generated: '2026-09-19'
method: probed
source:
- https://scramble.wibandwob.com/api/pet (GET, no credential -> 200)
- https://scramble.wibandwob.com/api/kibble (GET, no credential -> 200)
- https://scramble.wibandwob.com/api/guestbook (GET, no credential -> 200)
- https://scramble.wibandwob.com/api/feed (POST, no X-PAYMENT -> 402 with x402 terms)
- https://scramble.wibandwob.com/a2a (POST JSON-RPC, no credential -> 200)
- https://scramble.wibandwob.com/api/terms
docs: https://scramble.wibandwob.com/skill.md
note: >-
  Derived from live probes and the provider's own machine-readable terms, not from an OpenAPI document -
  the provider publishes no spec and derive-authentication.py was not run. The model is simple and the
  provider states it plainly: "No account, no key, no signup" (agents.md). The only gate anywhere is
  economic - an x402 payment on the two feed operations - and the provider is explicit that a payment
  authorization is not a credential ("This server holds NO private keys ... nothing to revoke").
summary:
  types: [none, x402-payment]
  api_key_in: []
  oauth2_flows: []
  anonymous_surfaces: 9
  paid_surfaces: 2
schemes:
- name: anonymous
  type: none
  applies_to:
  - GET /api, /api/pet, /api/guestbook, /api/kibble, /api/kibble/testnet, /api/terms, /api/bankr
  - POST /api/sign
  - POST /api/bankr/tip/claim (proof is the confirmed on-chain transaction hash in the body, not a credential)
  - A2A JSON-RPC message/send at / and /a2a
  observed: All GETs and the JSON-RPC endpoint returned HTTP 200 with no header of any kind. POST /api/sign and the tip claim were not exercised (permanent write / requires a real transfer) but the provider documents both as "no auth".
- name: x402Payment
  type: payment
  protocol: x402 v1, scheme exact
  in: header
  header: X-PAYMENT
  applies_to: [POST /api/feed, POST /api/feed/testnet]
  challenge: HTTP 402 with JSON terms in the body and base64 JSON in the PAYMENT-REQUIRED header (observed)
  credential: a signed EIP-3009 transferWithAuthorization for exactly maxAmountRequired (100000 base units USDC) to payTo 0x55c1186ceC287387f9e2c7C8aBD2323a21E88e74, valid until its own validBefore
  networks: {base: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913', base-sepolia: '0x036CbD53842c5426634e7929541eC2318f3dCF7e'}
  settlement: facilitator.openx402.ai executes the authorization; receipt in the body and the X-PAYMENT-RESPONSE header
  revocation: '"stop sending X-PAYMENT headers. There is no subscription to cancel and no allowance to revoke." (/api/terms)'
  note: One authorization pays for one call; the server cannot initiate a charge. This is per-request payment, not authentication of an identity.
identity:
  agent_identity_required: false
  note: The guest book asks for a self-declared name; nothing verifies it. The provider identifies ITSELF with a DID (did:web:wibandwob.com:wibwob in /.well-known/digit.json) but asks no identity of callers.