generated: '2026-09-19'
method: searched
source: https://www.plyrium.com/vouchspec/policies
sources:
- https://www.plyrium.com/vouchspec/policies ("Test environment")
- https://www.plyrium.com/vouchspec ("A separate, free Base Sepolia sandbox exists at vouchspec-sandbox.plyrium.com")
- https://vouchspec-sandbox.plyrium.com/api/vouchspec/v1/discovery (probed 2026-09-19, HTTP 200, schema_version 1.1.0, stage B_PUBLIC_X402_SANDBOX)
- https://vouchspec-sandbox.plyrium.com/api/vouchspec/v1/health (probed 2026-09-19, HTTP 200, environment sandbox)
- https://raw.githubusercontent.com/mordiaky/vouchspec/main/docs/payment-flow.md
description: >-
  A separate managed sandbox host that exercises the complete x402 flow - onchain settlement, isolated fulfillment,
  signing, public receipt caching and live invalidation - with test USDC on Base Sepolia, "without creating revenue".
  The provider states it is excluded from customer, request and traction metrics. No test cards, test keys or
  fixtures exist because the API has no card or key model; the test dimension is the payment NETWORK.
environments:
- name: live
  base_url: https://vouchspec.plyrium.com
  network: eip155:8453 (Base mainnet)
  asset: USDC
  amount: '0.25'
  terms_version: vouchspec-stage-b-mainnet-2026-07-15
  policy_url: https://www.plyrium.com/vouchspec/policies
- name: sandbox
  base_url: https://vouchspec-sandbox.plyrium.com
  network: eip155:84532 (Base Sepolia)
  asset: test USDC
  amount: '1.00'
  atomic_amount: '1000000'
  testnet_settlement_available: true
  mainnet_settlement_available: false
  counts_for_goal: false
  environment: test
  terms_version: vouchspec-stage-b-2026-07-14
  policy_url: https://vouchspec-sandbox.plyrium.com/vouchspec/policies
  reachability:
    discovery: 200
    health: 200
    openapi_json: 401 (HTML shell)
    llms_txt: 401
    well_known: 401 on every path
    note: only the discovery and health routes are open on the sandbox host; use the live host's OpenAPI (the contract is the same) with the sandbox base URL and network.
how_to_switch: Change the base URL to https://vouchspec-sandbox.plyrium.com and pay the 402 challenge it returns (eip155:84532, 1000000 atomic test USDC). The request body, headers and receipt verification are identical; the sandbox has its own issuer key, so fetch /api/vouchspec/v1/keys/issuer from the sandbox host.
test_values:
  cards: none - no card rail exists
  api_keys: none - credentials are issued only after a settled (test) payment
  fixtures: the live 402 body's extensions.bazaar.info.input.body is a complete example request (owner mordiaky, repository vouchspec-demo, commit 344558d51ecae7929c50b7cff94e120bfca53807, skill_path skills/hello-vouchspec) published by the provider; docs/examples/fresh-validation-request.json in the repo is the same shape
  time_simulation: none
hosted_proof: docs/payment-flow.md records an owner-controlled sandbox order on 2026-07-14 settling 1.00 test USDC on Base Sepolia and delivering a signed receipt - marked counts_for_goal false by the provider.