generated: '2026-09-11'
method: searched
source: >-
  https://anchor-x402.com/llms.txt, https://anchor-x402.com/demos/, https://anchor-x402.com/ai.txt,
  https://api.anchor-x402.com/docs, and live probes
sandbox_present: true
shape: free-preview-and-demo (no test network, no test keys)
test_network: false
test_credentials: false
note: >-
  There is no testnet, no test-mode key prefix and no fixture wallet, because there is no key and no account
  to have a test version of. Every call settles on mainnet with real USDC or JPYC. What exists instead is a
  set of genuinely free rehearsal surfaces that let a developer or an agent see exactly what a call costs
  and what it returns before spending anything.
surfaces:
- name: 402 challenge as a free price quote
  url: https://api.anchor-x402.com/v1/{service}
  free: true
  verified: '2026-09-11'
  detail: >-
    An unpaid request to any paid route returns the full x402 challenge - exact amount per rail, the payTo
    address, the input JSON Schema and a worked output example under extensions.bazaar. This is the closest
    thing to a dry run the API offers and it costs nothing.
  evidence:
    url: https://api.anchor-x402.com/v1/price/token
    status: 402
- name: Swagger UI
  url: https://api.anchor-x402.com/docs
  free: true
  verified: '2026-09-11'
  detail: Interactive try-it console over the full OpenAPI. Calls hit the live paid API.
- name: ReDoc
  url: https://api.anchor-x402.com/redoc
  free: true
  verified: '2026-09-11'
- name: Hosted chatbot free demo mode
  url: https://chat.anchor-x402.com
  free: true
  verified: '2026-09-11'
  detail: >-
    The hosted Claude agent offers free demo output for each of the 18 services via the "/demo <name>"
    command, with no payment and no wallet connected. The provider calls this the canonical demo surface and
    the recommended path for non-developers.
- name: Demos page
  url: https://anchor-x402.com/demos/
  free: true
  verified: '2026-09-11'
  detail: Worked demo output per service on the marketing site.
- name: MCP tools/list
  url: https://api.anchor-x402.com/mcp
  free: true
  verified: '2026-09-11'
  detail: >-
    tools/list, server/discover and initialize are free and anonymous, so an MCP client can enumerate all
    18 tools with real input schemas before any wallet is connected.
- name: A2A door
  url: https://api.anchor-x402.com/v1/a2a
  free: true
  verified: '2026-09-11'
  detail: >-
    Free in its entirety. peer/quote returns the price and payable URL for a skill without moving money;
    the provider states the endpoint "never moves money".
- name: Free verification endpoint
  url: https://api.anchor-x402.com/v1/attest/verify
  free: true
  detail: Re-verifies a previously anchored attestation at no charge.
- name: Self-host
  url: https://github.com/hypeprinter007-stack/anchor-x402
  free: true
  license: MIT
  detail: >-
    The whole service is MIT-licensed with a template.yaml SAM stack and a .env.example, so a reviewer can
    deploy a private instance instead of using a sandbox. The provider frames this as the audit path:
    "fork it, audit it, deploy your own".
guides:
- name: Pay an x402 API from Node.js
  url: https://anchor-x402.com/guides/pay-x402-api-node/
  status: 200
  detail: Complete ~30-line client that works against any endpoint here.
- name: Accept x402 payments in Python
  url: https://anchor-x402.com/guides/accept-x402-payments-python/
  status: 200
  detail: The FastAPI server pattern this service runs.
cheapest_real_call_usd: 0.001
gap: >-
  A developer cannot exercise the paid path at all without funding a mainnet wallet. At $0.001 the barrier
  is financial only in the narrowest sense, but it is still a wallet, a bridge and a mainnet transaction
  before the first successful call - which is a meaningfully higher first-run cost than an API key, and the
  provider ships no testnet rail to remove it.