generated: '2026-09-19'
method: searched
source: >-
  Registry metadata read unauthenticated on 2026-09-19 — registry.npmjs.org (search API and the
  @payanagent/sdk, @x402/fetch, @x402/evm, viem and agent402-mcp package documents), pypi.org/pypi/agent402/json,
  api.github.com/search/repositories?q=agent402 and api.github.com/users/agent402 — plus the provider's own
  /api/product paymentClient block, the /site-release-audit "Reviewed Node fallback" section, llms.txt and
  the OpenAPI.
checked: '2026-09-19'
summary:
  first_party_package_count: 0
  official_client_sdk_count: 0
  third_party_package_count: 4
  note: >-
    agent402.dev publishes NO client library, SDK or CLI of its own on any registry, and its docs say so
    implicitly: the contract is "read /openapi.json, read /.well-known/x402, call the resource, handle 402".
    What it does publish is a pinned, reviewed BUYER recipe — the four third-party npm packages below, at
    exact versions, installed with "npm install --save-exact" in a clean local Node project — for paying
    the 5 USDC audit from Node when a browser wallet is not available. They are recorded as third-party
    (official: false) with the version the provider pins AND the registry's current latest, because the
    gap between the two is the currency signal: the provider pins @x402/fetch and @x402/evm at 2.18.0
    while the registry is at 2.26.0 (2026-09-15). No SDKs pointer is emitted.
  name_collision: >-
    The npm namespace agent402-* (agent402-mcp 0.13.2, agent402-client 0.8.6, agent402-tollbooth,
    agent402-langchain, agent402-openclaw, agent402-agentkit, agent402-llamaindex, agent402-anthropic-tools,
    agent402-strands, agent402-openai-agents — all repository github.com/MikeyPetrillo/Agent402, author
    "Havok Holdings LLC", homepage https://agent402.tools) belongs to agent402.tools, a DIFFERENT company
    with a different product (a 500-tool MCP-native paid gateway). Nothing on agent402.dev references those
    packages or that repository, and their metadata never names agent402.dev. They are NOT this provider's
    and are not listed. PyPI agent402 does not exist (404). The GitHub search hits for "agent402"
    (agent402-tech/agent402-frontend, Adaptive-Liquidity/agent402, and eight hackathon repos) show no link
    to agent402.dev either; no GitHub organization is identified for this provider.
packages:
  - language: javascript
    registry: npm
    name: '@payanagent/sdk'
    url: https://www.npmjs.com/package/@payanagent/sdk
    install: npm install --save-exact @payanagent/sdk@0.2.2
    official: false
    kind: [buyer-client, x402-payment, third-party]
    role: 'Payan agents-only checkout route for the site audit (offer kh70zbzh8m5awkegpvn7tc82798aed20)'
    pinned_by_provider: 0.2.2
    version: 0.3.0
    published: '2026-08-02'
    repository: https://github.com/derNif/payanagent
    source: https://agent402.dev/api/product   # paymentClient.payanRecipePackages
  - language: javascript
    registry: npm
    name: '@x402/fetch'
    url: https://www.npmjs.com/package/@x402/fetch
    install: npm install --save-exact @x402/fetch@2.18.0
    official: false
    kind: [buyer-client, x402-payment, third-party]
    role: 'fetch wrapper that answers a 402 challenge with PAYMENT-SIGNATURE (x402 Foundation)'
    pinned_by_provider: 2.18.0
    version: 2.26.0
    published: '2026-09-15'
    repository: https://github.com/x402-foundation/x402
    source: https://agent402.dev/api/product
  - language: javascript
    registry: npm
    name: '@x402/evm'
    url: https://www.npmjs.com/package/@x402/evm
    install: npm install --save-exact @x402/evm@2.18.0
    official: false
    kind: [buyer-client, x402-payment, third-party]
    role: 'EVM (Base, eip155:8453) signing scheme for the x402 exact payment'
    pinned_by_provider: 2.18.0
    version: 2.26.0
    published: '2026-09-15'
    repository: https://github.com/x402-foundation/x402
    source: https://agent402.dev/api/product
  - language: javascript
    registry: npm
    name: viem
    url: https://www.npmjs.com/package/viem
    install: npm install --save-exact viem@2.55.1
    official: false
    kind: [wallet-client, third-party]
    role: 'wallet/account primitives used by the reviewed Node buyer script (WALLET_KEY env var)'
    pinned_by_provider: 2.55.1
    version: 2.56.8
    published: '2026-09-18'
    repository: https://github.com/wevm/viem
    source: https://agent402.dev/site-release-audit
registries_checked_with_no_first_party_result:
  - {registry: npm, query: 'agent402', result: '10 packages, all agent402.tools (Havok Holdings LLC) — unrelated'}
  - {registry: pypi, query: 'agent402', status: 404}
  - {registry: github, query: 'agent402', result: '15 repositories, none linked to agent402.dev'}
  - {registry: github-user, query: 'agent402', status: 200, note: 'a user named agent402 exists; nothing ties it to this domain and it is not claimed'}