openapi: 3.2.0
info:
  title: Gpt55 Model Gateway API
  version: 1.0.0
  description: Reduced GPT55 public surface after x402 project split, with GPT-5.6 Luna Standard as the default upstream gpt-5.6-luna model path, explicit Soul and Terra routes for higher-cost requests, the unified service hub, prepaid Luna call packs, and per-request x402 calls.
  x-gpt55-relatedProjects:
  - id: x402-utility-tools
    title: Utility tools
    status: retired_consolidated
    historicalOrigin: https://x402-utils.558686.xyz
    canonicalOrigin: https://gpt55.558686.xyz
    paidRoutesAvailableOnHistoricalHost: false
    retirementNotice: https://x402-utils.558686.xyz/.well-known/x402
    canonicalServiceHub: https://gpt55.558686.xyz/x402/service
    paymentPolicy: Do not pay a retired split-host URL. Follow the retirement notice to the canonical GPT55 service hub and fetch a fresh live quote there.
  - id: x402-agent-wallet-tools
    title: Agent wallet tools
    status: retired_consolidated
    historicalOrigin: https://x402-wallet.558686.xyz
    canonicalOrigin: https://gpt55.558686.xyz
    paidRoutesAvailableOnHistoricalHost: false
    retirementNotice: https://x402-wallet.558686.xyz/.well-known/x402
    canonicalServiceHub: https://gpt55.558686.xyz/x402/service
    paymentPolicy: Do not pay a retired split-host URL. Follow the retirement notice to the canonical GPT55 service hub and fetch a fresh live quote there.
  - id: x402-seller-growth-tools
    title: Seller growth tools
    status: retired_consolidated
    historicalOrigin: https://x402-seller.558686.xyz
    canonicalOrigin: https://gpt55.558686.xyz
    paidRoutesAvailableOnHistoricalHost: false
    retirementNotice: https://x402-seller.558686.xyz/.well-known/x402
    canonicalServiceHub: https://gpt55.558686.xyz/x402/service
    paymentPolicy: Do not pay a retired split-host URL. Follow the retirement notice to the canonical GPT55 service hub and fetch a fresh live quote there.
  - id: x402-key-url-tools
    title: Key and URL tools
    status: retired_consolidated
    historicalOrigin: https://x402-key.558686.xyz
    canonicalOrigin: https://gpt55.558686.xyz
    paidRoutesAvailableOnHistoricalHost: false
    retirementNotice: https://x402-key.558686.xyz/.well-known/x402
    canonicalServiceHub: https://gpt55.558686.xyz/x402/service
    paymentPolicy: Do not pay a retired split-host URL. Follow the retirement notice to the canonical GPT55 service hub and fetch a fresh live quote there.
  x-gpt55-payment:
    protocol: x402
    network: eip155:8453
    asset: USDC
    payTo: '0x1f0130669ca6fd02e025a984cc038f139df19a2f'
    facilitator: provider-pool
    facilitatorPool:
    - id: dexter
      url: https://x402.dexter.cash
      status: frozen_settlement
      active: false
      networks:
      - eip155:8453
      - solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp
      observedAt: '2026-07-19T16:04:32.063Z'
    - id: fluxa
      url: https://facilitator.fluxapay.xyz
      status: frozen_settlement
      active: false
      networks:
      - eip155:8453
      observedAt: '2026-07-19T16:04:32.063Z'
    - id: mogami
      url: https://v2.facilitator.mogami.tech
      status: frozen_unreachable
      active: false
      networks:
      - eip155:8453
      observedAt: '2026-09-18T08:31:22.080Z'
    - id: primer
      url: https://x402.primer.systems
      status: frozen_unreachable
      active: false
      networks:
      - eip155:8453
      observedAt: '2026-09-18T08:31:22.080Z'
    - id: xpay
      url: https://facilitator.xpay.sh
      status: enabled
      active: true
      networks:
      - eip155:8453
      observedAt: '2026-09-18T08:36:32.152Z'
    - id: payai
      url: https://facilitator.payai.network
      status: frozen_quota
      active: false
      networks:
      - eip155:8453
      - solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp
      observedAt: '2026-09-18T08:36:32.152Z'
    - id: kobaru
      url: https://gateway.kobaru.io
      status: frozen_unreachable
      active: false
      networks:
      - eip155:8453
      - solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp
      observedAt: '2026-09-18T08:31:22.080Z'
    - id: cdp
      url: https://api.cdp.coinbase.com/platform/v2/x402
      status: frozen_unreachable
      active: false
      networks:
      - eip155:8453
      - solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp
      observedAt: '2026-08-29T17:17:22.202Z'
    - id: solvador
      url: https://api.solvador.com
      status: disabled
      active: false
      networks: []
    fallbackFacilitators:
    - https://facilitator.xpay.sh
  primaryCommercialOffer:
    id: standard-chat-demand-first
    routeId: standard-chat
    title: GPT-5.6 Luna Standard one-request result
    buyerJob: Get one immediate OpenAI-compatible answer before committing to a quota pack or a larger workflow.
    method: POST
    paidUrl: https://gpt55.558686.xyz/v1/chat/completions/standard
    quoteOnlyUrl: https://gpt55.558686.xyz/v1/chat/completions/standard
    previewUrl: https://gpt55.558686.xyz/x402/service?checkout=standard-chat
    price: $0.00293
    priceUsd: 0.00293
    amountAtomic: '2930'
    network: eip155:8453
    asset: USDC
    assetAddress: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
    payTo: '0x1f0130669ca6fd02e025a984cc038f139df19a2f'
    input:
      contentType: application/json
      example:
        messages:
        - role: user
          content: Answer one concrete question in one short paragraph.
        max_tokens: 128
    resultFields:
    - id
    - model
    - choices
    - usage
    - x-x402-receipt-id
    - x-x402-receipt-url
    browserCheckout:
      available: true
      provider: EIP-1193 injected wallet
      type: eip3009-transfer-with-authorization
      url: https://gpt55.558686.xyz/x402/service?checkout=standard-chat
      paidUrl: https://gpt55.558686.xyz/v1/chat/completions/standard
      quoteOnlyUrl: https://gpt55.558686.xyz/v1/chat/completions/standard
      bundleUrl: https://gpt55.558686.xyz/x402/browser-wallet-payment.js
      method: POST
      network: eip155:8453
      asset: USDC
      assetAddress: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
      payTo: '0x1f0130669ca6fd02e025a984cc038f139df19a2f'
      amountAtomic: '2930'
      paymentHeader: PAYMENT-SIGNATURE
      responseHeaders:
      - PAYMENT-RESPONSE
      - X-PAYMENT-RESPONSE
      - x-x402-receipt-id
      - x-x402-receipt-url
      privateKeySentToService: false
      buttonLabel: Pay with browser wallet
    agentFallback:
      routeId: standard
      firstPaymentClient: https://gpt55.558686.xyz/x402/first-payment-client.mjs
      quoteOnlyCommand: ROUTE_ID=standard MAX_USDC=0.00293 node first-payment-client.mjs
      realPaymentCommand: PAY_REAL_X402=1 ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
      installCommand: npm install @x402/fetch @x402/core @x402/evm viem
      requiredRuntime: optional-desktop-or-server-terminal-fallback
      sameRequestRetry: true
      paymentHeaders:
      - PAYMENT-SIGNATURE
      - X-PAYMENT
      privateKeySentToService: false
    model: gpt-5.6-luna
    nextPurchase:
      id: gpt-5.6-luna-100-call-pack
      routeId: gpt-5.6-luna-100-call-pack
      title: GPT-5.6 Luna 100 Prepaid Call Credits
      model: gpt-5.6-luna
      method: GET
      paidUrl: https://gpt55.558686.xyz/v1/paid/call-packs/gpt-5.6-luna-100
      checkoutUrl: https://gpt55.558686.xyz/v1/paid/call-packs/gpt-5.6-luna-100
      quoteOnlyUrl: https://gpt55.558686.xyz/v1/paid/call-packs/gpt-5.6-luna-100
      price: $1.60
      amountAtomic: '1600000'
      callCount: 100
      network: eip155:8453
      asset: USDC
      assetAddress: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
      payTo: '0x1f0130669ca6fd02e025a984cc038f139df19a2f'
      privateKeySentToService: false
      reason: Use one prepaid purchase for repeated GPT-5.6 Luna calls with fewer payment steps.
    label: GPT-5.6 Luna Standard one-request result
    page: https://gpt55.558686.xyz/x402/service?checkout=standard-chat
    json: https://gpt55.558686.xyz/x402/service.json
    checkoutUrl: https://gpt55.558686.xyz/x402/service?checkout=standard-chat
    quoteUrl: https://gpt55.558686.xyz/v1/chat/completions/standard
    quoteEndpoint: https://gpt55.558686.xyz/v1/chat/completions/standard
    quoteEndpointMode: live-402
    firstPaymentClient: https://gpt55.558686.xyz/x402/first-payment-client.mjs
    paymentClientUrl: https://gpt55.558686.xyz/x402/first-payment-client.mjs
    paymentActivation: https://gpt55.558686.xyz/x402/service?checkout=standard-chat
    installCommand: npm install @x402/fetch @x402/core @x402/evm viem
    quoteOnlyDedicated: ROUTE_ID=standard MAX_USDC=0.00293 node first-payment-client.mjs
    realPaymentDedicated: PAY_REAL_X402=1 ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
    paymentHeaderOnlyDedicated: X402_PAYMENT_HEADER_ONLY=1 X402_PAYMENT_HEADER_FILE=x402-payment-header.txt ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
    installThenCreatePaymentHeaderDedicated: npm install @x402/fetch @x402/core @x402/evm viem && X402_PAYMENT_HEADER_ONLY=1 X402_PAYMENT_HEADER_FILE=x402-payment-header.txt ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
    downloadInstallThenCreatePaymentHeaderDedicated: curl -fsSL https://gpt55.558686.xyz/x402/first-payment-client.mjs -o first-payment-client.mjs && npm install @x402/fetch @x402/core @x402/evm viem && X402_PAYMENT_HEADER_ONLY=1 X402_PAYMENT_HEADER_FILE=x402-payment-header.txt ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
    payCommand: curl -fsSL https://gpt55.558686.xyz/x402/first-payment-client.mjs -o first-payment-client.mjs && npm install @x402/fetch @x402/core @x402/evm viem && PAY_REAL_X402=1 ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
    downloadInstallThenPayDedicated: curl -fsSL https://gpt55.558686.xyz/x402/first-payment-client.mjs -o first-payment-client.mjs && npm install @x402/fetch @x402/core @x402/evm viem && PAY_REAL_X402=1 ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
    expectedResult:
    - id
    - model
    - choices
    - usage
    - x-x402-receipt-id
    - x-x402-receipt-url
  marketDemandOffer:
    id: standard-chat-demand-first
    routeId: standard-chat
    title: GPT-5.6 Luna Standard one-request result
    buyerJob: Get one immediate OpenAI-compatible answer before committing to a quota pack or a larger workflow.
    method: POST
    paidUrl: https://gpt55.558686.xyz/v1/chat/completions/standard
    quoteOnlyUrl: https://gpt55.558686.xyz/v1/chat/completions/standard
    previewUrl: https://gpt55.558686.xyz/x402/service?checkout=standard-chat
    price: $0.00293
    priceUsd: 0.00293
    amountAtomic: '2930'
    network: eip155:8453
    asset: USDC
    assetAddress: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
    payTo: '0x1f0130669ca6fd02e025a984cc038f139df19a2f'
    input:
      contentType: application/json
      example:
        messages:
        - role: user
          content: Answer one concrete question in one short paragraph.
        max_tokens: 128
    resultFields:
    - id
    - model
    - choices
    - usage
    - x-x402-receipt-id
    - x-x402-receipt-url
    browserCheckout:
      available: true
      provider: EIP-1193 injected wallet
      type: eip3009-transfer-with-authorization
      url: https://gpt55.558686.xyz/x402/service?checkout=standard-chat
      paidUrl: https://gpt55.558686.xyz/v1/chat/completions/standard
      quoteOnlyUrl: https://gpt55.558686.xyz/v1/chat/completions/standard
      bundleUrl: https://gpt55.558686.xyz/x402/browser-wallet-payment.js
      method: POST
      network: eip155:8453
      asset: USDC
      assetAddress: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
      payTo: '0x1f0130669ca6fd02e025a984cc038f139df19a2f'
      amountAtomic: '2930'
      paymentHeader: PAYMENT-SIGNATURE
      responseHeaders:
      - PAYMENT-RESPONSE
      - X-PAYMENT-RESPONSE
      - x-x402-receipt-id
      - x-x402-receipt-url
      privateKeySentToService: false
      buttonLabel: Pay with browser wallet
    agentFallback:
      routeId: standard
      firstPaymentClient: https://gpt55.558686.xyz/x402/first-payment-client.mjs
      quoteOnlyCommand: ROUTE_ID=standard MAX_USDC=0.00293 node first-payment-client.mjs
      realPaymentCommand: PAY_REAL_X402=1 ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
      installCommand: npm install @x402/fetch @x402/core @x402/evm viem
      requiredRuntime: optional-desktop-or-server-terminal-fallback
      sameRequestRetry: true
      paymentHeaders:
      - PAYMENT-SIGNATURE
      - X-PAYMENT
      privateKeySentToService: false
    model: gpt-5.6-luna
    nextPurchase:
      id: gpt-5.6-luna-100-call-pack
      routeId: gpt-5.6-luna-100-call-pack
      title: GPT-5.6 Luna 100 Prepaid Call Credits
      model: gpt-5.6-luna
      method: GET
      paidUrl: https://gpt55.558686.xyz/v1/paid/call-packs/gpt-5.6-luna-100
      checkoutUrl: https://gpt55.558686.xyz/v1/paid/call-packs/gpt-5.6-luna-100
      quoteOnlyUrl: https://gpt55.558686.xyz/v1/paid/call-packs/gpt-5.6-luna-100
      price: $1.60
      amountAtomic: '1600000'
      callCount: 100
      network: eip155:8453
      asset: USDC
      assetAddress: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
      payTo: '0x1f0130669ca6fd02e025a984cc038f139df19a2f'
      privateKeySentToService: false
      reason: Use one prepaid purchase for repeated GPT-5.6 Luna calls with fewer payment steps.
    label: GPT-5.6 Luna Standard one-request result
    page: https://gpt55.558686.xyz/x402/service?checkout=standard-chat
    json: https://gpt55.558686.xyz/x402/service.json
    checkoutUrl: https://gpt55.558686.xyz/x402/service?checkout=standard-chat
    quoteUrl: https://gpt55.558686.xyz/v1/chat/completions/standard
    quoteEndpoint: https://gpt55.558686.xyz/v1/chat/completions/standard
    quoteEndpointMode: live-402
    firstPaymentClient: https://gpt55.558686.xyz/x402/first-payment-client.mjs
    paymentClientUrl: https://gpt55.558686.xyz/x402/first-payment-client.mjs
    paymentActivation: https://gpt55.558686.xyz/x402/service?checkout=standard-chat
    installCommand: npm install @x402/fetch @x402/core @x402/evm viem
    quoteOnlyDedicated: ROUTE_ID=standard MAX_USDC=0.00293 node first-payment-client.mjs
    realPaymentDedicated: PAY_REAL_X402=1 ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
    paymentHeaderOnlyDedicated: X402_PAYMENT_HEADER_ONLY=1 X402_PAYMENT_HEADER_FILE=x402-payment-header.txt ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
    installThenCreatePaymentHeaderDedicated: npm install @x402/fetch @x402/core @x402/evm viem && X402_PAYMENT_HEADER_ONLY=1 X402_PAYMENT_HEADER_FILE=x402-payment-header.txt ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
    downloadInstallThenCreatePaymentHeaderDedicated: curl -fsSL https://gpt55.558686.xyz/x402/first-payment-client.mjs -o first-payment-client.mjs && npm install @x402/fetch @x402/core @x402/evm viem && X402_PAYMENT_HEADER_ONLY=1 X402_PAYMENT_HEADER_FILE=x402-payment-header.txt ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
    payCommand: curl -fsSL https://gpt55.558686.xyz/x402/first-payment-client.mjs -o first-payment-client.mjs && npm install @x402/fetch @x402/core @x402/evm viem && PAY_REAL_X402=1 ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
    downloadInstallThenPayDedicated: curl -fsSL https://gpt55.558686.xyz/x402/first-payment-client.mjs -o first-payment-client.mjs && npm install @x402/fetch @x402/core @x402/evm viem && PAY_REAL_X402=1 ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
    expectedResult:
    - id
    - model
    - choices
    - usage
    - x-x402-receipt-id
    - x-x402-receipt-url
  recommendedFirstPurchase:
    id: standard-chat-demand-first
    routeId: standard-chat
    title: GPT-5.6 Luna Standard one-request result
    buyerJob: Get one immediate OpenAI-compatible answer before committing to a quota pack or a larger workflow.
    method: POST
    paidUrl: https://gpt55.558686.xyz/v1/chat/completions/standard
    quoteOnlyUrl: https://gpt55.558686.xyz/v1/chat/completions/standard
    previewUrl: https://gpt55.558686.xyz/x402/service?checkout=standard-chat
    price: $0.00293
    priceUsd: 0.00293
    amountAtomic: '2930'
    network: eip155:8453
    asset: USDC
    assetAddress: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
    payTo: '0x1f0130669ca6fd02e025a984cc038f139df19a2f'
    input:
      contentType: application/json
      example:
        messages:
        - role: user
          content: Answer one concrete question in one short paragraph.
        max_tokens: 128
    resultFields:
    - id
    - model
    - choices
    - usage
    - x-x402-receipt-id
    - x-x402-receipt-url
    browserCheckout:
      available: true
      provider: EIP-1193 injected wallet
      type: eip3009-transfer-with-authorization
      url: https://gpt55.558686.xyz/x402/service?checkout=standard-chat
      paidUrl: https://gpt55.558686.xyz/v1/chat/completions/standard
      quoteOnlyUrl: https://gpt55.558686.xyz/v1/chat/completions/standard
      bundleUrl: https://gpt55.558686.xyz/x402/browser-wallet-payment.js
      method: POST
      network: eip155:8453
      asset: USDC
      assetAddress: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
      payTo: '0x1f0130669ca6fd02e025a984cc038f139df19a2f'
      amountAtomic: '2930'
      paymentHeader: PAYMENT-SIGNATURE
      responseHeaders:
      - PAYMENT-RESPONSE
      - X-PAYMENT-RESPONSE
      - x-x402-receipt-id
      - x-x402-receipt-url
      privateKeySentToService: false
      buttonLabel: Pay with browser wallet
    agentFallback:
      routeId: standard
      firstPaymentClient: https://gpt55.558686.xyz/x402/first-payment-client.mjs
      quoteOnlyCommand: ROUTE_ID=standard MAX_USDC=0.00293 node first-payment-client.mjs
      realPaymentCommand: PAY_REAL_X402=1 ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
      installCommand: npm install @x402/fetch @x402/core @x402/evm viem
      requiredRuntime: optional-desktop-or-server-terminal-fallback
      sameRequestRetry: true
      paymentHeaders:
      - PAYMENT-SIGNATURE
      - X-PAYMENT
      privateKeySentToService: false
    model: gpt-5.6-luna
    nextPurchase:
      id: gpt-5.6-luna-100-call-pack
      routeId: gpt-5.6-luna-100-call-pack
      title: GPT-5.6 Luna 100 Prepaid Call Credits
      model: gpt-5.6-luna
      method: GET
      paidUrl: https://gpt55.558686.xyz/v1/paid/call-packs/gpt-5.6-luna-100
      checkoutUrl: https://gpt55.558686.xyz/v1/paid/call-packs/gpt-5.6-luna-100
      quoteOnlyUrl: https://gpt55.558686.xyz/v1/paid/call-packs/gpt-5.6-luna-100
      price: $1.60
      amountAtomic: '1600000'
      callCount: 100
      network: eip155:8453
      asset: USDC
      assetAddress: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
      payTo: '0x1f0130669ca6fd02e025a984cc038f139df19a2f'
      privateKeySentToService: false
      reason: Use one prepaid purchase for repeated GPT-5.6 Luna calls with fewer payment steps.
    label: GPT-5.6 Luna Standard one-request result
    page: https://gpt55.558686.xyz/x402/service?checkout=standard-chat
    json: https://gpt55.558686.xyz/x402/service.json
    checkoutUrl: https://gpt55.558686.xyz/x402/service?checkout=standard-chat
    quoteUrl: https://gpt55.558686.xyz/v1/chat/completions/standard
    quoteEndpoint: https://gpt55.558686.xyz/v1/chat/completions/standard
    quoteEndpointMode: live-402
    firstPaymentClient: https://gpt55.558686.xyz/x402/first-payment-client.mjs
    paymentClientUrl: https://gpt55.558686.xyz/x402/first-payment-client.mjs
    paymentActivation: https://gpt55.558686.xyz/x402/service?checkout=standard-chat
    installCommand: npm install @x402/fetch @x402/core @x402/evm viem
    quoteOnlyDedicated: ROUTE_ID=standard MAX_USDC=0.00293 node first-payment-client.mjs
    realPaymentDedicated: PAY_REAL_X402=1 ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
    paymentHeaderOnlyDedicated: X402_PAYMENT_HEADER_ONLY=1 X402_PAYMENT_HEADER_FILE=x402-payment-header.txt ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
    installThenCreatePaymentHeaderDedicated: npm install @x402/fetch @x402/core @x402/evm viem && X402_PAYMENT_HEADER_ONLY=1 X402_PAYMENT_HEADER_FILE=x402-payment-header.txt ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
    downloadInstallThenCreatePaymentHeaderDedicated: curl -fsSL https://gpt55.558686.xyz/x402/first-payment-client.mjs -o first-payment-client.mjs && npm install @x402/fetch @x402/core @x402/evm viem && X402_PAYMENT_HEADER_ONLY=1 X402_PAYMENT_HEADER_FILE=x402-payment-header.txt ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
    payCommand: curl -fsSL https://gpt55.558686.xyz/x402/first-payment-client.mjs -o first-payment-client.mjs && npm install @x402/fetch @x402/core @x402/evm viem && PAY_REAL_X402=1 ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
    downloadInstallThenPayDedicated: curl -fsSL https://gpt55.558686.xyz/x402/first-payment-client.mjs -o first-payment-client.mjs && npm install @x402/fetch @x402/core @x402/evm viem && PAY_REAL_X402=1 ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
    expectedResult:
    - id
    - model
    - choices
    - usage
    - x-x402-receipt-id
    - x-x402-receipt-url
  x-demand-first-offer:
    id: standard-chat-demand-first
    routeId: standard-chat
    title: GPT-5.6 Luna Standard one-request result
    buyerJob: Get one immediate OpenAI-compatible answer before committing to a quota pack or a larger workflow.
    method: POST
    paidUrl: https://gpt55.558686.xyz/v1/chat/completions/standard
    quoteOnlyUrl: https://gpt55.558686.xyz/v1/chat/completions/standard
    previewUrl: https://gpt55.558686.xyz/x402/service?checkout=standard-chat
    price: $0.00293
    priceUsd: 0.00293
    amountAtomic: '2930'
    network: eip155:8453
    asset: USDC
    assetAddress: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
    payTo: '0x1f0130669ca6fd02e025a984cc038f139df19a2f'
    input:
      contentType: application/json
      example:
        messages:
        - role: user
          content: Answer one concrete question in one short paragraph.
        max_tokens: 128
    resultFields:
    - id
    - model
    - choices
    - usage
    - x-x402-receipt-id
    - x-x402-receipt-url
    browserCheckout:
      available: true
      provider: EIP-1193 injected wallet
      type: eip3009-transfer-with-authorization
      url: https://gpt55.558686.xyz/x402/service?checkout=standard-chat
      paidUrl: https://gpt55.558686.xyz/v1/chat/completions/standard
      quoteOnlyUrl: https://gpt55.558686.xyz/v1/chat/completions/standard
      bundleUrl: https://gpt55.558686.xyz/x402/browser-wallet-payment.js
      method: POST
      network: eip155:8453
      asset: USDC
      assetAddress: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
      payTo: '0x1f0130669ca6fd02e025a984cc038f139df19a2f'
      amountAtomic: '2930'
      paymentHeader: PAYMENT-SIGNATURE
      responseHeaders:
      - PAYMENT-RESPONSE
      - X-PAYMENT-RESPONSE
      - x-x402-receipt-id
      - x-x402-receipt-url
      privateKeySentToService: false
      buttonLabel: Pay with browser wallet
    agentFallback:
      routeId: standard
      firstPaymentClient: https://gpt55.558686.xyz/x402/first-payment-client.mjs
      quoteOnlyCommand: ROUTE_ID=standard MAX_USDC=0.00293 node first-payment-client.mjs
      realPaymentCommand: PAY_REAL_X402=1 ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
      installCommand: npm install @x402/fetch @x402/core @x402/evm viem
      requiredRuntime: optional-desktop-or-server-terminal-fallback
      sameRequestRetry: true
      paymentHeaders:
      - PAYMENT-SIGNATURE
      - X-PAYMENT
      privateKeySentToService: false
    model: gpt-5.6-luna
    nextPurchase:
      id: gpt-5.6-luna-100-call-pack
      routeId: gpt-5.6-luna-100-call-pack
      title: GPT-5.6 Luna 100 Prepaid Call Credits
      model: gpt-5.6-luna
      method: GET
      paidUrl: https://gpt55.558686.xyz/v1/paid/call-packs/gpt-5.6-luna-100
      checkoutUrl: https://gpt55.558686.xyz/v1/paid/call-packs/gpt-5.6-luna-100
      quoteOnlyUrl: https://gpt55.558686.xyz/v1/paid/call-packs/gpt-5.6-luna-100
      price: $1.60
      amountAtomic: '1600000'
      callCount: 100
      network: eip155:8453
      asset: USDC
      assetAddress: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
      payTo: '0x1f0130669ca6fd02e025a984cc038f139df19a2f'
      privateKeySentToService: false
      reason: Use one prepaid purchase for repeated GPT-5.6 Luna calls with fewer payment steps.
    label: GPT-5.6 Luna Standard one-request result
    page: https://gpt55.558686.xyz/x402/service?checkout=standard-chat
    json: https://gpt55.558686.xyz/x402/service.json
    checkoutUrl: https://gpt55.558686.xyz/x402/service?checkout=standard-chat
    quoteUrl: https://gpt55.558686.xyz/v1/chat/completions/standard
    quoteEndpoint: https://gpt55.558686.xyz/v1/chat/completions/standard
    quoteEndpointMode: live-402
    firstPaymentClient: https://gpt55.558686.xyz/x402/first-payment-client.mjs
    paymentClientUrl: https://gpt55.558686.xyz/x402/first-payment-client.mjs
    paymentActivation: https://gpt55.558686.xyz/x402/service?checkout=standard-chat
    installCommand: npm install @x402/fetch @x402/core @x402/evm viem
    quoteOnlyDedicated: ROUTE_ID=standard MAX_USDC=0.00293 node first-payment-client.mjs
    realPaymentDedicated: PAY_REAL_X402=1 ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
    paymentHeaderOnlyDedicated: X402_PAYMENT_HEADER_ONLY=1 X402_PAYMENT_HEADER_FILE=x402-payment-header.txt ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
    installThenCreatePaymentHeaderDedicated: npm install @x402/fetch @x402/core @x402/evm viem && X402_PAYMENT_HEADER_ONLY=1 X402_PAYMENT_HEADER_FILE=x402-payment-header.txt ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
    downloadInstallThenCreatePaymentHeaderDedicated: curl -fsSL https://gpt55.558686.xyz/x402/first-payment-client.mjs -o first-payment-client.mjs && npm install @x402/fetch @x402/core @x402/evm viem && X402_PAYMENT_HEADER_ONLY=1 X402_PAYMENT_HEADER_FILE=x402-payment-header.txt ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
    payCommand: curl -fsSL https://gpt55.558686.xyz/x402/first-payment-client.mjs -o first-payment-client.mjs && npm install @x402/fetch @x402/core @x402/evm viem && PAY_REAL_X402=1 ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
    downloadInstallThenPayDedicated: curl -fsSL https://gpt55.558686.xyz/x402/first-payment-client.mjs -o first-payment-client.mjs && npm install @x402/fetch @x402/core @x402/evm viem && PAY_REAL_X402=1 ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
    expectedResult:
    - id
    - model
    - choices
    - usage
    - x-x402-receipt-id
    - x-x402-receipt-url
  walletBalanceOffer:
    id: evm-wallet-balance-demand-first
    routeId: evm-wallet-balance
    title: EVM Wallet Balance Snapshot
    buyerJob: Check live ETH and canonical USDC balances, then decide whether a public wallet has enough Base USDC for the next $0.001 x402 payment.
    method: GET or POST
    paidUrl: https://gpt55.558686.xyz/v1/tools/evm-wallet-balance
    quoteOnlyUrl: https://gpt55.558686.xyz/v1/tools/evm-wallet-balance?address=0x1111111111111111111111111111111111111111&network=base
    previewUrl: https://gpt55.558686.xyz/x402/service?checkout=evm-wallet-balance
    price: $0.001
    priceUsd: 0.001
    amountAtomic: '1000'
    network: eip155:8453
    asset: USDC
    assetAddress: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
    payTo: '0x1f0130669ca6fd02e025a984cc038f139df19a2f'
    input:
      contentType: application/json
      required:
      - address
      optional:
      - network
      example:
        address: '0x1111111111111111111111111111111111111111'
        network: base
    resultFields:
    - network
    - chainId
    - address
    - blockNumber
    - nativeBalance
    - usdcBalance
    - x402Readiness
    - observedAt
    - rpcProviderHost
    readinessScope:
      balanceOnly: true
      suggestedPaymentAtomic: '1000'
      suggestedPaymentUsd: '0.001'
      fullDoctorUrl: https://gpt55.558686.xyz/v1/tools/x402-wallet-funding-readiness-doctor
      limitation: Does not prove payment-client, typed-data signing, spend-cap, or same-request retry readiness.
    browserCheckout:
      available: true
      provider: EIP-1193 injected wallet
      type: eip3009-transfer-with-authorization
      url: https://gpt55.558686.xyz/x402/service?checkout=evm-wallet-balance
      paidUrl: https://gpt55.558686.xyz/v1/tools/evm-wallet-balance
      quoteOnlyUrl: https://gpt55.558686.xyz/v1/tools/evm-wallet-balance?address=0x1111111111111111111111111111111111111111&network=base
      bundleUrl: https://gpt55.558686.xyz/x402/browser-wallet-payment.js
      method: POST
      body:
        address: '0x1111111111111111111111111111111111111111'
        network: base
      inputFields:
      - name: address
        type: text
        required: true
        source: connected wallet or public EVM address
      - name: network
        type: select
        required: false
        default: base
        options:
        - base
        - ethereum
      network: eip155:8453
      asset: USDC
      assetAddress: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
      payTo: '0x1f0130669ca6fd02e025a984cc038f139df19a2f'
      amountAtomic: '1000'
      paymentHeader: PAYMENT-SIGNATURE
      responseHeaders:
      - PAYMENT-RESPONSE
      - X-PAYMENT-RESPONSE
      - x-x402-receipt-id
      - x-x402-receipt-url
      privateKeySentToService: false
      buttonLabel: Pay with browser wallet
    agentFallback:
      routeId: evm-wallet-balance
      firstPaymentClient: https://gpt55.558686.xyz/x402/first-payment-client.mjs
      targetUrl: https://gpt55.558686.xyz/v1/tools/evm-wallet-balance?address=0x1111111111111111111111111111111111111111&network=base
      quoteOnlyCommand: TARGET_URL="https://gpt55.558686.xyz/v1/tools/evm-wallet-balance?address=0x1111111111111111111111111111111111111111&network=base" MAX_USDC=0.001 node first-payment-client.mjs
      realPaymentCommand: PAY_REAL_X402=1 TARGET_URL="https://gpt55.558686.xyz/v1/tools/evm-wallet-balance?address=0x1111111111111111111111111111111111111111&network=base" MAX_USDC=0.001 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
      installCommand: npm install @x402/fetch @x402/core @x402/evm viem
      requiredRuntime: optional-desktop-or-server-terminal-fallback
      sameRequestRetry: true
      paymentHeaders:
      - PAYMENT-SIGNATURE
      - X-PAYMENT
      privateKeySentToService: false
    nextPurchase:
      id: gpt-5.6-luna-100-call-pack
      routeId: gpt-5.6-luna-100-call-pack
      title: GPT-5.6 Luna 100 Prepaid Call Credits
      model: gpt-5.6-luna
      method: GET
      paidUrl: https://gpt55.558686.xyz/v1/paid/call-packs/gpt-5.6-luna-100
      checkoutUrl: https://gpt55.558686.xyz/v1/paid/call-packs/gpt-5.6-luna-100
      quoteOnlyUrl: https://gpt55.558686.xyz/v1/paid/call-packs/gpt-5.6-luna-100
      price: $1.60
      amountAtomic: '1600000'
      callCount: 100
      network: eip155:8453
      asset: USDC
      assetAddress: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
      payTo: '0x1f0130669ca6fd02e025a984cc038f139df19a2f'
      privateKeySentToService: false
      reason: Use one prepaid purchase for repeated GPT-5.6 Luna calls with fewer payment steps.
    compatibility:
      legacyRoutesPreserved: true
      standardChatUrl: https://gpt55.558686.xyz/v1/chat/completions/standard
      standardChatPrice: $0.00293
      legacyPayTo: '0x1f0130669ca6fd02e025a984cc038f139df19a2f'
    label: EVM Wallet Balance Snapshot
    page: https://gpt55.558686.xyz/x402/service?checkout=evm-wallet-balance
    json: https://gpt55.558686.xyz/x402/service.json
    checkoutUrl: https://gpt55.558686.xyz/x402/service?checkout=evm-wallet-balance
    quoteUrl: https://gpt55.558686.xyz/v1/tools/evm-wallet-balance
    quoteEndpoint: https://gpt55.558686.xyz/v1/tools/evm-wallet-balance
    quoteEndpointMode: live-402
    firstPaymentClient: https://gpt55.558686.xyz/x402/first-payment-client.mjs
    paymentClientUrl: https://gpt55.558686.xyz/x402/first-payment-client.mjs
    paymentActivation: https://gpt55.558686.xyz/x402/service?checkout=evm-wallet-balance
    installCommand: npm install @x402/fetch @x402/core @x402/evm viem
    quoteOnlyDedicated: TARGET_URL="https://gpt55.558686.xyz/v1/tools/evm-wallet-balance?address=0x1111111111111111111111111111111111111111&network=base" MAX_USDC=0.001 node first-payment-client.mjs
    realPaymentDedicated: PAY_REAL_X402=1 TARGET_URL="https://gpt55.558686.xyz/v1/tools/evm-wallet-balance?address=0x1111111111111111111111111111111111111111&network=base" MAX_USDC=0.001 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
    paymentHeaderOnlyDedicated: X402_PAYMENT_HEADER_ONLY=1 X402_PAYMENT_HEADER_FILE=x402-payment-header.txt TARGET_URL="https://gpt55.558686.xyz/v1/tools/evm-wallet-balance?address=0x1111111111111111111111111111111111111111&network=base" MAX_USDC=0.001 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
    installThenCreatePaymentHeaderDedicated: npm install @x402/fetch @x402/core @x402/evm viem && X402_PAYMENT_HEADER_ONLY=1 X402_PAYMENT_HEADER_FILE=x402-payment-header.txt TARGET_URL="https://gpt55.558686.xyz/v1/tools/evm-wallet-balance?address=0x1111111111111111111111111111111111111111&network=base" MAX_USDC=0.001 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
    downloadInstallThenCreatePaymentHeaderDedicated: curl -fsSL https://gpt55.558686.xyz/x402/first-payment-client.mjs -o first-payment-client.mjs && npm install @x402/fetch @x402/core @x402/evm viem && X402_PAYMENT_HEADER_ONLY=1 X402_PAYMENT_HEADER_FILE=x402-payment-header.txt TARGET_URL="https://gpt55.558686.xyz/v1/tools/evm-wallet-balance?address=0x1111111111111111111111111111111111111111&network=base" MAX_USDC=0.001 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
    payCommand: curl -fsSL https://gpt55.558686.xyz/x402/first-payment-client.mjs -o first-payment-client.mjs && npm install @x402/fetch @x402/core @x402/evm viem && PAY_REAL_X402=1 TARGET_URL="https://gpt55.558686.xyz/v1/tools/evm-wallet-balance?address=0x1111111111111111111111111111111111111111&network=base" MAX_USDC=0.001 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
    downloadInstallThenPayDedicated: curl -fsSL https://gpt55.558686.xyz/x402/first-payment-client.mjs -o first-payment-client.mjs && npm install @x402/fetch @x402/core @x402/evm viem && PAY_REAL_X402=1 TARGET_URL="https://gpt55.558686.xyz/v1/tools/evm-wallet-balance?address=0x1111111111111111111111111111111111111111&network=base" MAX_USDC=0.001 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
    expectedResult:
    - network
    - chainId
    - address
    - blockNumber
    - nativeBalance
    - usdcBalance
    - x402Readiness
    - observedAt
    - rpcProviderHost
  standardChatOffer:
    id: standard-chat-demand-first
    routeId: standard-chat
    title: GPT-5.6 Luna Standard one-request result
    buyerJob: Get one immediate OpenAI-compatible answer before committing to a quota pack or a larger workflow.
    method: POST
    paidUrl: https://gpt55.558686.xyz/v1/chat/completions/standard
    quoteOnlyUrl: https://gpt55.558686.xyz/v1/chat/completions/standard
    previewUrl: https://gpt55.558686.xyz/x402/service?checkout=standard-chat
    price: $0.00293
    priceUsd: 0.00293
    amountAtomic: '2930'
    network: eip155:8453
    asset: USDC
    assetAddress: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
    payTo: '0x1f0130669ca6fd02e025a984cc038f139df19a2f'
    input:
      contentType: application/json
      example:
        messages:
        - role: user
          content: Answer one concrete question in one short paragraph.
        max_tokens: 128
    resultFields:
    - id
    - model
    - choices
    - usage
    - x-x402-receipt-id
    - x-x402-receipt-url
    browserCheckout:
      available: true
      provider: EIP-1193 injected wallet
      type: eip3009-transfer-with-authorization
      url: https://gpt55.558686.xyz/x402/service?checkout=standard-chat
      paidUrl: https://gpt55.558686.xyz/v1/chat/completions/standard
      quoteOnlyUrl: https://gpt55.558686.xyz/v1/chat/completions/standard
      bundleUrl: https://gpt55.558686.xyz/x402/browser-wallet-payment.js
      method: POST
      network: eip155:8453
      asset: USDC
      assetAddress: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
      payTo: '0x1f0130669ca6fd02e025a984cc038f139df19a2f'
      amountAtomic: '2930'
      paymentHeader: PAYMENT-SIGNATURE
      responseHeaders:
      - PAYMENT-RESPONSE
      - X-PAYMENT-RESPONSE
      - x-x402-receipt-id
      - x-x402-receipt-url
      privateKeySentToService: false
      buttonLabel: Pay with browser wallet
    agentFallback:
      routeId: standard
      firstPaymentClient: https://gpt55.558686.xyz/x402/first-payment-client.mjs
      quoteOnlyCommand: ROUTE_ID=standard MAX_USDC=0.00293 node first-payment-client.mjs
      realPaymentCommand: PAY_REAL_X402=1 ROUTE_ID=standard MAX_USDC=0.00293 EVM_PRIVATE_KEY=$EVM_PRIVATE_KEY node first-payment-client.mjs
      installCommand: npm install @x402/fetch @x402/core @x402/evm viem
      requiredRuntime: optional-desktop-or-server-terminal-fallback
      sameRequestRetry: true
      paymentHeaders:
      - PAYMENT-SIGNATURE
      - X-PAYMENT
      privateKeySentToService: false
    model: gpt-5.6-luna
    nextPurchase:
      id: gpt-5.6-luna-100-call-pack
      routeId: gpt-5.6-luna-100-call-pack
      title: GPT-5.6 Luna 100 Prepaid Call Credits
      model: gpt-5.6-luna
      method: GET
      paidUrl: https://gpt55.558686.xyz/v1/paid/call-packs/gpt-5.6-luna-100
      checkoutUrl: https://gpt55.558686.xyz/v1/paid/call-packs/gpt-5.6-luna-100
      quoteOnlyUrl: https://gpt55.558686.xyz/v1/paid/call-packs/gpt-5.6-luna-100
      price: $1.60
      amountAtomic: '1600000'
      callCount: 100
      network: eip155:8453
      asset: USDC
      assetAddress: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
      payTo: '0x1f0130669ca6fd02e025a984cc038f139df19a2f'
      privateKeySentToService: false
      reason: Use one prepaid purchase for repeated GPT-5.6 Luna calls with fewer payment steps.
  x-gpt55-repeat-call-pack:
    id: gpt-5.6-luna-100-call-pack
    routeId: gpt-5.6-luna-100-call-pack
    title: GPT-5.6 Luna 100 Prepaid Call Credits
    model: gpt-5.6-luna
    method: GET
    paidUrl: https://gpt55.558686.xyz/v1/paid/call-packs/gpt-5.6-luna-100
    checkoutUrl: https://gpt55.558686.xyz/v1/paid/call-packs/gpt-5.6-luna-100
    quoteOnlyUrl: https://gpt55.558686.xyz/v1/paid/call-packs/gpt-5.6-luna-100
    price: $1.60
    amountAtomic: '1600000'
    callCount: 100
    network: eip155:8453
    asset: USDC
    assetAddress: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
    payTo: '0x1f0130669ca6fd02e025a984cc038f139df19a2f'
    privateKeySentToService: false
    reason: Use one prepaid purchase for repeated GPT-5.6 Luna calls with fewer payment steps.
  x-gpt55-canonical-links:
    repository: https://github.com/wangletiand/gpt55-x402-gateway
    githubPages: https://wangletiand.github.io/gpt55-x402-gateway/
    startApplyBuyUrl: https://gpt55.558686.xyz/x402/service
    unifiedServiceHub: https://gpt55.558686.xyz/x402/service
    unifiedServiceHubJson: https://gpt55.558686.xyz/x402/service.json
servers:
- url: https://gpt55.558686.xyz
tags:
- name: gpt55-model-gateway
paths:
  /v1/models:
    get:
      operationId: v1Models
      summary: models
      tags:
      - gpt55-model-gateway
      security: []
      responses:
        '200':
          description: Successful GPT55 route response
  /v1/chat/completions:
    post:
      operationId: v1ChatCompletions
      summary: completions
      tags:
      - gpt55-model-gateway
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                model:
                  type: string
                  enum:
                  - gpt-5.6-sol
                  - gpt-5.6-luna
                  - gpt-5.6-terra
                  - gpt-5.6
                  - gpt-5.6-luna-standard
                  - gpt-5.5
                  - gpt-5.3-codex
                  - gpt-5.4
                  default: gpt-5.6-luna
                messages:
                  type: array
                max_tokens:
                  type: integer
              required:
              - messages
              additionalProperties: true
      description: OpenAI-compatible chat completions. The x402 quote is selected from the request body model. Omitting model executes the bounded GPT-5.6 Luna Standard entry at the historically converting $0.00293 quote; explicit full model routes retain their published Luna-relative prices, and the old mini name remains only as a compatibility alias.
      x-gpt55-pricing:
        mode: dynamic_by_request_model
        defaultModel: gpt-5.6-luna
        defaultPrice: $0.00293
        defaultAmountAtomic: '2930'
        policy: historical_external_conversion_restore_20260726
        models:
        - id: gpt-5.6-sol
          price: $0.099995
          amountAtomic: '99995'
          endpoint: https://gpt55.558686.xyz/v1/chat/completions/gpt-5.6-sol
        - id: gpt-5.6-luna
          price: $0.019999
          amountAtomic: '19999'
          endpoint: https://gpt55.558686.xyz/v1/chat/completions/gpt-5.6-luna
        - id: gpt-5.6-terra
          price: $0.049998
          amountAtomic: '49998'
          endpoint: https://gpt55.558686.xyz/v1/chat/completions/gpt-5.6-terra
        - id: gpt-5.6
          price: $0.099995
          amountAtomic: '99995'
          endpoint: https://gpt55.558686.xyz/v1/chat/completions/gpt-5.6
        - id: gpt-5.6-luna-standard
          price: $0.00293
          amountAtomic: '2930'
          endpoint: https://gpt55.558686.xyz/v1/chat/completions/standard
        - id: gpt-5.5
          price: $0.019999
          amountAtomic: '19999'
          endpoint: https://gpt55.558686.xyz/v1/chat/completions/gpt-5.5
        - id: gpt-5.3-codex
          price: $0.007472
          amountAtomic: '7472'
          endpoint: https://gpt55.558686.xyz/v1/chat/completions/gpt-5.3-codex
        - id: gpt-5.4
          price: $0.010109
          amountAtomic: '10109'
          endpoint: https://gpt55.558686.xyz/v1/chat/completions
      responses:
        '200':
          description: Successful GPT55 route response
        '402':
          description: x402 payment required
      x-x402-price: $0.00293
  /v1/chat/completions/standard:
    post:
      operationId: v1ChatCompletionsStandard
      summary: GPT-5.6 Luna Standard chat completion
      tags:
      - gpt55-model-gateway
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      description: One OpenAI-compatible GPT-5.6 Luna result at the Standard entry price.
      x-gpt55-product:
        id: standard-chat
        routeId: standard-chat
        price: $0.00293
        amountAtomic: '2930'
        model: gpt-5.6-luna
        tier: standard
        pricingPolicy: historical_external_conversion_restore_20260726
      responses:
        '200':
          description: Successful GPT55 route response
        '402':
          description: x402 payment required
      x-x402-price: $0.00293
  /v1/chat/completions/gpt-5.6-sol:
    post:
      operationId: v1ChatCompletionsGpt56Sol
      summary: GPT-5.6 Soul chat completion
      tags:
      - gpt55-model-gateway
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      x-gpt55-product:
        id: gpt-5.6-sol
        price: $0.099995
        amountAtomic: '99995'
        model: gpt-5.6-sol
        tier: soul
        pricingPolicy: public_luna_standard_geometric_mean_rebase
      responses:
        '200':
          description: Successful GPT55 route response
        '402':
          description: x402 payment required
      x-x402-price: $0.099995
  /v1/chat/completions/gpt-5.6-luna:
    post:
      operationId: v1ChatCompletionsGpt56Luna
      summary: GPT-5.6 Luna chat completion
      tags:
      - gpt55-model-gateway
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      x-gpt55-product:
        id: gpt-5.6-luna
        price: $0.019999
        amountAtomic: '19999'
        model: gpt-5.6-luna
        tier: luna
        pricingPolicy: public_luna_standard_geometric_mean_rebase
      responses:
        '200':
          description: Successful GPT55 route response
        '402':
          description: x402 payment required
      x-x402-price: $0.019999
  /v1/chat/completions/gpt-5.6-terra:
    post:
      operationId: v1ChatCompletionsGpt56Terra
      summary: GPT-5.6 Terra chat completion
      tags:
      - gpt55-model-gateway
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      x-gpt55-product:
        id: gpt-5.6-terra
        price: $0.049998
        amountAtomic: '49998'
        model: gpt-5.6-terra
        tier: terra
        pricingPolicy: public_luna_standard_geometric_mean_rebase
      responses:
        '200':
          description: Successful GPT55 route response
        '402':
          description: x402 payment required
      x-x402-price: $0.049998
  /v1/chat/completions/gpt-5.6:
    post:
      operationId: v1ChatCompletionsGpt56
      summary: GPT-5.6 Soul chat completion alias
      tags:
      - gpt55-model-gateway
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      x-gpt55-product:
        id: gpt-5.6
        price: $0.099995
        amountAtomic: '99995'
        model: gpt-5.6
        tier: soul-alias
        pricingPolicy: public_luna_standard_geometric_mean_rebase
      responses:
        '200':
          description: Successful GPT55 route response
        '402':
          description: x402 payment required
      x-x402-price: $0.099995
  /v1/chat/completions/gpt-5.5:
    post:
      operationId: v1ChatCompletionsGpt55
      summary: gpt-5.5
      tags:
      - gpt55-model-gateway
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      x-gpt55-product:
        id: gpt-5.5
        price: $0.019999
        amountAtomic: '19999'
        model: gpt-5.5
        tier: premium
        pricingPolicy: public_luna_standard_geometric_mean_rebase
      responses:
        '200':
          description: Successful GPT55 route response
        '402':
          description: x402 payment required
      x-x402-price: $0.019999
  /v1/chat/completions/gpt-5.3-codex:
    post:
      operationId: v1ChatCompletionsGpt53Codex
      summary: gpt-5.3-codex
      tags:
      - gpt55-model-gateway
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      x-gpt55-product:
        id: gpt-5.3-codex
        price: $0.007472
        amountAtomic: '7472'
        model: gpt-5.3-codex
        tier: codex
        pricingPolicy: public_luna_standard_geometric_mean_rebase
      responses:
        '200':
          description: Successful GPT55 route response
        '402':
          description: x402 payment required
      x-x402-price: $0.007472
  /v1/chat/completions/metered:
    post:
      operationId: v1ChatCompletionsMetered
      summary: metered
      tags:
      - gpt55-model-gateway
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      description: Usage-metered GPT-5.5 chat with an exact guarantee deposit and internal balance credit for unused funds.
      x-gpt55-billing:
        price: $0.523889
        amountAtomic: '523889'
        preferredScheme: exact
        scheme: exact
        mode: guarantee_deposit_internal_balance_refund
        refundMode: internal_balance_credit
        balanceChatEndpoint: https://gpt55.558686.xyz/v1/chat/completions/balance
        officialGpt55Pricing:
          inputPerMillionUsd: 5
          cachedInputPerMillionUsd: 0.5
          outputPerMillionUsd: 30
        discountMultiplier: 0.111112
        minimumUsd: 0.0001
        maxOutputTokens: 128000
        bestFor:
        - exact guarantee deposit before model execution
        - unused deposit credited to internal balance
      responses:
        '200':
          description: Successful GPT55 route response
        '402':
          description: x402 payment required
      x-x402-price: $0.523889
  /v1/paid/call-packs/gpt-5.6-sol-100:
    get:
      operationId: v1PaidCallPacksGpt56Sol100
      summary: gpt 5.6 sol 100
      tags:
      - gpt55-model-gateway
      parameters:
      - name: quote_only
        in: query
        required: false
        description: Optional directory probe hint. An unpaid request still returns the normal x402 payment challenge.
        schema:
          type: boolean
          default: true
      description: Prepaid call pack for repeated GPT55 model calls with fewer per-call x402 payment steps.
      x-gpt55-purchase-mode: prepaid_call_pack
      responses:
        '200':
          description: Successful GPT55 route response
        '402':
          description: x402 payment required
      x-x402-price: $8
  /v1/paid/call-packs/gpt-5.6-luna-100:
    get:
      operationId: v1PaidCallPacksGpt56Luna100
      summary: gpt 5.6 luna 100
      tags:
      - gpt55-model-gateway
      parameters:
      - name: quote_only
        in: query
        required: false
        description: Optional directory probe hint. An unpaid request still returns the normal x402 payment challenge.
        schema:
          type: boolean
          default: true
      description: 100 prepaid GPT-5.6 Luna call credits for repeated use with fewer per-call x402 payment steps.
      x-gpt55-purchase-mode: prepaid_call_pack
      x-gpt55-product:
        id: gpt-5.6-luna-100-call-pack
        routeId: gpt-5.6-luna-100-call-pack
        title: GPT-5.6 Luna 100 Prepaid Call Credits
        model: gpt-5.6-luna
        method: GET
        paidUrl: https://gpt55.558686.xyz/v1/paid/call-packs/gpt-5.6-luna-100
        checkoutUrl: https://gpt55.558686.xyz/v1/paid/call-packs/gpt-5.6-luna-100
        quoteOnlyUrl: https://gpt55.558686.xyz/v1/paid/call-packs/gpt-5.6-luna-100
        price: $1.60
        amountAtomic: '1600000'
        callCount: 100
        network: eip155:8453
        asset: USDC
        assetAddress: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
        payTo: '0x1f0130669ca6fd02e025a984cc038f139df19a2f'
        privateKeySentToService: false
        reason: Use one prepaid purchase for repeated GPT-5.6 Luna calls with fewer payment steps.
      responses:
        '200':
          description: Successful GPT55 route response
        '402':
          description: x402 payment required
      x-x402-price: $1.60
  /v1/paid/call-packs/gpt-5.6-terra-100:
    get:
      operationId: v1PaidCallPacksGpt56Terra100
      summary: gpt 5.6 terra 100
      tags:
      - gpt55-model-gateway
      parameters:
      - name: quote_only
        in: query
        required: false
        description: Optional directory probe hint. An unpaid request still returns the normal x402 payment challenge.
        schema:
          type: boolean
          default: true
      description: Prepaid call pack for repeated GPT55 model calls with fewer per-call x402 payment steps.
      x-gpt55-purchase-mode: prepaid_call_pack
      responses:
        '200':
          description: Successful GPT55 route response
        '402':
          description: x402 payment required
      x-x402-price: $4
  /v1/paid/call-packs/gpt-5.5-100:
    get:
      operationId: v1PaidCallPacksGpt55100
      summary: gpt 5.5 100
      tags:
      - gpt55-model-gateway
      parameters:
      - name: quote_only
        in: query
        required: false
        description: Optional directory probe hint. An unpaid request still returns the normal x402 payment challenge.
        schema:
          type: boolean
          default: true
      description: Prepaid call pack for repeated GPT55 model calls with fewer per-call x402 payment steps.
      x-gpt55-purchase-mode: prepaid_call_pack
      responses:
        '200':
          description: Successful GPT55 route response
        '402':
          description: x402 payment required
      x-x402-price: $1.6
  /v1/paid/call-packs/gpt-5.3-codex-100:
    get:
      operationId: v1PaidCallPacksGpt53Codex100
      summary: gpt 5.3 codex 100
      tags:
      - gpt55-model-gateway
      parameters:
      - name: quote_only
        in: query
        required: false
        description: Optional directory probe hint. An unpaid request still returns the normal x402 payment challenge.
        schema:
          type: boolean
          default: true
      description: Prepaid call pack for repeated GPT55 model calls with fewer per-call x402 payment steps.
      x-gpt55-purchase-mode: prepaid_call_pack
      responses:
        '200':
          description: Successful GPT55 route response
        '402':
          description: x402 payment required
      x-x402-price: $0.598
  /v1/tools/translate:
    post:
      operationId: v1ToolsTranslate
      summary: translate
      tags:
      - gpt55-model-gateway
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      responses:
        '200':
          description: Successful GPT55 route response
        '402':
          description: x402 payment required
      x-x402-price: $0.00293
  /v1/tools/translate/standard:
    post:
      operationId: v1ToolsTranslateStandard
      summary: standard
      tags:
      - gpt55-model-gateway
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      responses:
        '200':
          description: Successful GPT55 route response
        '402':
          description: x402 payment required
      x-x402-price: $0.00293
  /v1/tools/translate/plus:
    post:
      operationId: v1ToolsTranslatePlus
      summary: plus
      tags:
      - gpt55-model-gateway
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      responses:
        '200':
          description: Successful GPT55 route response
        '402':
          description: x402 payment required
      x-x402-price: $0.145
  /v1/tools/translate/professional:
    post:
      operationId: v1ToolsTranslateProfessional
      summary: professional
      tags:
      - gpt55-model-gateway
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      responses:
        '200':
          description: Successful GPT55 route response
        '402':
          description: x402 payment required
      x-x402-price: $0.145
  /v1/tools/summarize:
    post:
      operationId: v1ToolsSummarize
      summary: summarize
      tags:
      - gpt55-model-gateway
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      responses:
        '200':
          description: Successful GPT55 route response
        '402':
          description: x402 payment required
      x-x402-price: $0.00293
  /v1/tools/rewrite:
    post:
      operationId: v1ToolsRewrite
      summary: rewrite
      tags:
      - gpt55-model-gateway
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      responses:
        '200':
          description: Successful GPT55 route response
        '402':
          description: x402 payment required
      x-x402-price: $0.00293
  /v1/tools/answer:
    post:
      operationId: v1ToolsAnswer
      summary: answer
      tags:
      - gpt55-model-gateway
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      responses:
        '200':
          description: Successful GPT55 route response
        '402':
          description: x402 payment required
      x-x402-price: $0.00293
  /v1/tools/code-review:
    post:
      operationId: v1ToolsCodeReview
      summary: code review
      tags:
      - gpt55-model-gateway
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      responses:
        '200':
          description: Successful GPT55 route response
        '402':
          description: x402 payment required
      x-x402-price: $0.00293
  /v1/tools/extract-json:
    post:
      operationId: v1ToolsExtractJson
      summary: extract json
      tags:
      - gpt55-model-gateway
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      responses:
        '200':
          description: Successful GPT55 route response
        '402':
          description: x402 payment required
      x-x402-price: $0.00293
  /v1/tools/sub2api-official-metered-invoice:
    post:
      operationId: v1ToolsSub2apiOfficialMeteredInvoice
      summary: sub2api official metered invoice
      tags:
      - gpt55-model-gateway
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      responses:
        '200':
          description: Successful GPT55 route response
        '402':
          description: x402 payment required
      x-x402-price: $0.066667
  /v1/tools/sub2api-balance-ledger-simulator:
    post:
      operationId: v1ToolsSub2apiBalanceLedgerSimulator
      summary: sub2api balance ledger simulator
      tags:
      - gpt55-model-gateway
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      responses:
        '200':
          description: Successful GPT55 route response
        '402':
          description: x402 payment required
      x-x402-price: $0.1
  /v1/tools/gpt55-plus-half-price-subscription:
    post:
      operationId: v1ToolsGpt55PlusHalfPriceSubscription
      summary: gpt55 plus half price subscription
      tags:
      - gpt55-model-gateway
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      responses:
        '200':
          description: Successful GPT55 route response
        '402':
          description: x402 payment required
      x-x402-price: $10
externalDocs:
  description: GPT55 unified buyer service hub
  url: https://gpt55.558686.xyz/x402/service
x-x402-compatibility:
  index: https://gpt55.558686.xyz/x402/compatibility.json
  contracts:
  - projectId: x402-utility-tools
    status: retired_consolidated
    historicalOrigin: https://x402-utils.558686.xyz
    canonicalOrigin: https://gpt55.558686.xyz
    retirementNotice: https://x402-utils.558686.xyz/.well-known/x402
    paidRoutesAvailableOnHistoricalHost: false
  - projectId: x402-agent-wallet-tools
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    canonicalOrigin: https://gpt55.558686.xyz
    retirementNotice: https://x402-wallet.558686.xyz/.well-known/x402
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  - projectId: x402-seller-growth-tools
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    canonicalOrigin: https://gpt55.558686.xyz
    retirementNotice: https://x402-seller.558686.xyz/.well-known/x402
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    canonicalOrigin: https://gpt55.558686.xyz
    retirementNotice: https://x402-key.558686.xyz/.well-known/x402
    paidRoutesAvailableOnHistoricalHost: false