aid: hilt-so
name: Hilt
description: 'Hilt is a zero-custody Solana payments company operated in the United Kingdom by Paul Wild trading
  as Hilt (London). It ships four connected products: PayMe (a free receiving link and QR for an OAuth-verified
  X handle, sender pays a flat 2% fee), Direct Checkout (a no-account SOL / USDC / single-token checkout link),
  Hilt Pay Workspace (the merchant dashboard for hosted checkout, embeds, WooCommerce, receipts, memberships, native
  Solana USDC subscriptions and signed webhooks) and Hilt Pay API, the developer and agent product under /v1/access
  that turns an HTTP 402 into an operating record: x402 V2 payment requirement, Solana USDC or native SOL settlement,
  receipt, entitlement, atomic metered usage consumption, MPP payment channels and webhook trail. Hilt publishes
  an OpenAPI 3.1 contract (165 operations on api.hilt.so), a hosted MCP gateway and an OAuth-gated PayMe MCP connector,
  an A2A agent card, llms.txt on three hosts, TypeScript and Python SDKs, a CLI, Postman assets and a documented
  sandbox. Live pricing is $0/month plus 1% per successful settlement.'
image: https://www.hilt.so/Logo.png
url: https://raw.githubusercontent.com/api-evangelist/hilt-so/refs/heads/main/apis.yml
x-type: company
position: Producing
x-source: harvest:a2a-registry
x-tier: profiled
x-tier-reason: full enrichment pass 2026-09-19 (local-v3)
x-company:
  legal_name: Paul Wild trading as Hilt
  structure: sole trader
  country: United Kingdom
  city: London
  address: Office 18824, 182-184 High Street North, East Ham, London, E6 2JA
  launched: '2026-05-01'
  source: https://www.hilt.so/legal/terms
specificationVersion: '0.20'
created: '2026-09-19'
modified: '2026-09-19'
tags:
- Payments
- Solana
- Stablecoins
- USDC
- Crypto Payments
- Agentic Payments
- x402
- Checkout
- Subscription
- Webhook
- MCP
- Entitlements
- Micropayments
- Developer Tools
- Fintech
tags_raw:
- Payments
- Solana
- Stablecoins
- USDC
- Crypto Payments
- Agentic Payments
- x402
- Checkout
- Subscriptions
- Webhooks
- MCP
- Entitlements
- Micropayments
- Developer Tools
- Fintech
apis:
- aid: hilt-so:hilt-pay-api
  name: Hilt API (Pay API + Workspace)
  description: 'The Hilt REST contract: Hilt Pay API /v1/access routes (agent bootstrap, apps, products, x402 V2
    payment sessions and settlement, durable and metered entitlements, MPP metered payment channels, native Solana
    USDC subscriptions, sandbox sessions, webhooks), Workspace merchant routes (products, hosted checkout, payments,
    memberships, receipts, support, webhooks, API keys, testing scenarios), PayMe routes and the agent-commerce
    offer/catalog/pricing and plan-activation routes. OpenAPI 3.1.0, 154 paths / 165 operations, FastAPI-generated;
    declares no securitySchemes (auth documented in prose: X-Hilt-Key hk_live_/hk_sandbox_, dashboard bearer, PayMe
    OAuth PKCE, x402 PAYMENT-SIGNATURE, MPP Authorization: Payment).'
  image: https://www.hilt.so/Logo.png
  humanURL: https://docs.hilt.so/developers/access
  baseURL: https://api.hilt.so
  tags:
  - Payments
  - Solana
  - USDC
  - x402
  - Entitlements
  - Subscription
  - Webhook
  - Receipts
  - Checkout
  - Agentic Payments
  tags_raw:
  - Payments
  - Solana
  - USDC
  - x402
  - Entitlements
  - Subscriptions
  - Webhooks
  - Receipts
  - Checkout
  - Agentic Payments
  properties:
  - type: OpenAPI
    url: openapi/hilt-so-openapi.yml
  - type: OpenAPI
    url: https://api.hilt.so/openapi.json
    name: Provider-hosted OpenAPI (full, 165 operations)
  - type: OpenAPI
    url: https://api.hilt.so/v1/openapi.json
    name: Provider-hosted OpenAPI v1 subset (143 paths; also served at https://www.hilt.so/openapi.json and mirrored
      in github.com/Hiltpay/hilt-developer-assets/openapi/hilt-openapi-v1.json)
  - type: Documentation
    url: https://docs.hilt.so/developers
  - type: APIReference
    url: https://api.hilt.so/v1/docs
  - type: APIReference
    url: https://api.hilt.so/v1/redoc
    name: Redoc
  - type: GettingStarted
    url: https://docs.hilt.so/developers/quickstart
  - type: Overlay
    url: overlays/hilt-so-openapi-overlay.yaml
  - type: Authentication
    url: authentication/hilt-so-authentication.yml
  - type: OAuthScopes
    url: scopes/hilt-so-scopes.yml
  - type: Conventions
    url: conventions/hilt-so-conventions.yml
  - type: Idempotency
    url: conventions/hilt-so-conventions.yml
  - type: ErrorCatalog
    url: errors/hilt-so-problem-types.yml
  - type: Conformance
    url: conformance/hilt-so-conformance.yml
  - type: Lifecycle
    url: lifecycle/hilt-so-lifecycle.yml
  - type: Sandbox
    url: sandbox/hilt-so-sandbox.yml
  - type: DataModel
    url: data-model/hilt-so-data-model.yml
  - type: Webhooks
    url: asyncapi/hilt-so-webhooks-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/hilt-so-webhooks-asyncapi.yml
  - type: Webhooks
    url: https://docs.hilt.so/developers/webhooks
    name: Webhook docs
  - type: RateLimits
    url: rate-limits/hilt-so-rate-limits.yml
  - type: Plans
    url: plans/hilt-so-plans-pricing.yml
  - type: ChangeLog
    url: changelog/hilt-so-changelog.yml
  - type: Postman
    url: https://www.hilt.so/downloads/hilt-postman-collection-latest.json
  - type: Postman
    url: postman/hilt-so-postman-collection.json
    name: Saved copy of the public collection
  - type: Packages
    url: packages/hilt-so-packages.yml
  - type: SDKs
    url: packages/hilt-so-packages.yml
  - type: CLI
    url: cli/hilt-so-cli.yml
  - type: Components
    url: components/hilt-so-components.yml
  - type: AgentSkill
    url: skills/_index.yml
  - type: ToolCrosswalk
    url: mcp/hilt-so-tool-crosswalk.yml
- aid: hilt-so:transaction-evidence
  name: Hilt Solana Transaction Evidence API
  description: 'A public pay-per-request x402 V2 resource on www.hilt.so (0.05 USDC per request, Solana USDC): POST
    /v1/solana/transaction-evidence returns signers, invoked programs, SOL and token balance changes, parsed transfers,
    finality, fee and timestamp for one finalized Solana mainnet transaction. Its own OpenAPI 3.1.0 declares the
    PAYMENT-REQUIRED 402 header and PAYMENT-RESPONSE 200 header plus x-payment-info. Announced 27 August 2026 as
    one of two live payment paths for wallet-capable agents.'
  image: https://www.hilt.so/Logo.png
  humanURL: https://docs.hilt.so/developers/transaction-evidence
  baseURL: https://www.hilt.so
  tags:
  - Solana
  - Blockchain Data
  - x402
  - Micropayments
  - Transaction Evidence
  properties:
  - type: OpenAPI
    url: openapi/hilt-so-transaction-evidence-openapi.yml
  - type: OpenAPI
    url: https://www.hilt.so/v1/solana/transaction-evidence/openapi.json
    name: Provider-hosted OpenAPI
  - type: Documentation
    url: https://docs.hilt.so/developers/transaction-evidence
  - type: Plans
    url: plans/hilt-so-plans-pricing.yml
  - type: Conformance
    url: conformance/hilt-so-conformance.yml
- aid: hilt-so:agent-gateway
  name: Hilt Pay Agent Gateway (MCP + A2A)
  description: 'Hosted MCP server at https://api.hilt.so/mcp (streamable HTTP, protocol 2025-06-18, server Hilt
    Pay Agent Gateway 1.1.0) exposing nine tools: free offer/catalog/pricing/quote/sandbox-bootstrap tools and x402-paid
    Starter/Growth/Scale plan activation plus API-key claim, each with a real JSON Schema inputSchema (tools/list
    answers anonymously). The same gateway publishes an A2A 0.3.0 agent card at /.well-known/agent-card.json (four
    skills) with a JSON-RPC endpoint at /a2a/jsonrpc and a second Agentverse transport at /agentverse/a2a. Listed
    on Glama and Smithery.'
  image: https://www.hilt.so/Logo.png
  humanURL: https://docs.hilt.so/developers/agent-setup
  baseURL: https://api.hilt.so/mcp
  tags:
  - MCP
  - A2A
  - Agentic Commerce
  - x402
  - Solana
  - USDC
  tags_raw:
  - MCP
  - A2A
  - Agent Commerce
  - x402
  - Solana
  - USDC
  properties:
  - type: MCPServer
    url: mcp/hilt-so-mcp.yml
  - type: MCPServer
    url: https://api.hilt.so/mcp
    name: Live MCP endpoint (probed)
  - type: ToolCrosswalk
    url: mcp/hilt-so-tool-crosswalk.yml
  - type: AgentCard
    url: a2a/hilt-so-a2a.yml
  - type: AgentCard
    url: https://api.hilt.so/.well-known/agent-card.json
    name: Live agent card (probed 200)
  - type: Documentation
    url: https://docs.hilt.so/developers/agent-builder-kit
  - type: Documentation
    url: https://www.hilt.so/agent-discovery-standard
    name: Agent Discovery Standard
  - type: Plans
    url: plans/hilt-so-plans-pricing.yml
  - type: AgentSkill
    url: skills/_index.yml
- aid: hilt-so:payme-mcp
  name: Hilt PayMe MCP Connector
  description: 'OAuth-gated remote MCP resource at https://api.hilt.so/mcp/pay-me for compatible AI clients: resolve
    a verified PayMe handle, start a wallet-approved SOL or Solana USDC payment (the client prepares terms; the
    payer signs in their own wallet), read activity, and create/cancel payment links. Authorization is OAuth authorization-code
    with PKCE S256 and dynamic client registration on the issuer https://api.hilt.so (RFC 8414 + RFC 9728 metadata
    published), scopes pay_me:read, pay_me:request, pay_me:prepare. Anonymous tools/list answers 401 with a resource_metadata
    challenge; the ten tool names come from the docs.'
  image: https://www.hilt.so/Logo.png
  humanURL: https://docs.hilt.so/developers/pay-me-mcp
  baseURL: https://api.hilt.so/mcp/pay-me
  tags:
  - MCP
  - Authentication
  - Solana
  - USDC
  - Payments
  - PayMe
  tags_raw:
  - MCP
  - OAuth
  - Solana
  - USDC
  - Payments
  - PayMe
  properties:
  - type: MCPServer
    url: mcp/hilt-so-pay-me-mcp.yml
  - type: MCPServer
    url: https://api.hilt.so/mcp/pay-me
    name: Live MCP endpoint (OAuth-gated, probed 401)
  - type: OAuthScopes
    url: scopes/hilt-so-scopes.yml
  - type: Authentication
    url: authentication/hilt-so-authentication.yml
  - type: Documentation
    url: https://docs.hilt.so/developers/pay-me-mcp
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://www.hilt.so/
- type: DeveloperPortal
  url: https://www.hilt.so/developers
- type: Documentation
  url: https://docs.hilt.so/developers
- type: APIReference
  url: https://api.hilt.so/v1/docs
- type: GettingStarted
  url: https://docs.hilt.so/developers/quickstart
- type: Support
  url: https://docs.hilt.so/merchant/support
- type: Contact
  url: https://www.hilt.so/contact
- type: Blog
  url: https://www.hilt.so/articles
- type: GitHubOrganization
  url: https://github.com/Hiltpay
- type: Pricing
  url: https://www.hilt.so/developers/pricing
- type: SignUp
  url: https://app.hilt.so/register
- type: Login
  url: https://app.hilt.so/login
- type: TermsOfService
  url: https://www.hilt.so/legal/terms
- type: PrivacyPolicy
  url: https://www.hilt.so/legal/privacy
- type: RefundPolicy
  url: https://www.hilt.so/legal/refund
- type: StatusPage
  url: https://www.hilt.so/status
- type: ChangeLog
  url: https://www.hilt.so/updates
- type: ReleaseNotes
  url: https://docs.hilt.so/release-notes/changelog
- type: ChangeLog
  url: changelog/hilt-so-changelog.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/hiltpay
- type: YouTube
  url: https://www.youtube.com/@hiltpay
- type: Postman
  url: https://www.hilt.so/downloads/hilt-postman-collection-latest.json
- type: LLMsTxt
  url: llms/hilt-so-llms.txt
- type: LLMsTxt
  url: https://www.hilt.so/llms.txt
  name: www llms.txt
- type: LLMsTxt
  url: https://docs.hilt.so/llms.txt
  name: docs llms.txt
- type: WellKnown
  url: well-known/hilt-so-well-known.yml
- type: MCPServer
  url: mcp/hilt-so-mcp.yml
- type: MCPServer
  url: mcp/hilt-so-pay-me-mcp.yml
- type: ToolCrosswalk
  url: mcp/hilt-so-tool-crosswalk.yml
- type: AgentCard
  url: a2a/hilt-so-a2a.yml
- type: Packages
  url: packages/hilt-so-packages.yml
- type: SDKs
  url: packages/hilt-so-packages.yml
- type: CLI
  url: cli/hilt-so-cli.yml
- type: Components
  url: components/hilt-so-components.yml
- type: Sandbox
  url: sandbox/hilt-so-sandbox.yml
- type: Authentication
  url: authentication/hilt-so-authentication.yml
- type: OAuthScopes
  url: scopes/hilt-so-scopes.yml
- type: Conventions
  url: conventions/hilt-so-conventions.yml
- type: Idempotency
  url: conventions/hilt-so-conventions.yml
- type: Lifecycle
  url: lifecycle/hilt-so-lifecycle.yml
- type: Conformance
  url: conformance/hilt-so-conformance.yml
- type: ErrorCatalog
  url: errors/hilt-so-problem-types.yml
- type: DomainSecurity
  url: security/hilt-so-domain-security.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Plans
  url: plans/hilt-so-plans-pricing.yml
- type: RateLimits
  url: rate-limits/hilt-so-rate-limits.yml
- type: Webhooks
  url: asyncapi/hilt-so-webhooks-asyncapi.yml
- type: AsyncAPI
  url: asyncapi/hilt-so-webhooks-asyncapi.yml
- type: DataModel
  url: data-model/hilt-so-data-model.yml
- type: Overlay
  url: overlays/hilt-so-openapi-overlay.yaml
- type: RegulatoryPosture
  url: regulatory/hilt-so-regulatory-posture.yml
- type: DataSubjectRequest
  url: https://www.hilt.so/legal/privacy
x-enrichment:
  date: '2026-09-19'
  status: enriched
  artifacts_added: 48
  pass: local-v3