CONNSKILL Payments API

openapi: 3.2.0
info:
  title: CONNSKILL Growth Services Payments API
  version: 3.0.0
  description: 'Search research for AI agents: Local Market Check packages, domain ranking snapshots and keyword demand data.'
  termsOfService: https://agent.connskill.com/pricing
  contact:
    email: info@connskill.com
  x-logo:
    url: https://agent.connskill.com/icon.png
    altText: CONNSKILL
  logo: https://agent.connskill.com/icon.png
  icon: https://agent.connskill.com/icon.png
  x-guidance: Read the free discovery, input and quote routes first. Paid operations return an x402 challenge carrying the exact amount, asset, network and recipient. Prices can vary with selected tier, inputs or usage; use the actual challenge before approving payment. Support is free and uses a separate wallet ownership signature. Preserve the original request and payment proof for redelivery; never pay again for an unresolved purchase.
  x-trust:
    operator: CONNSKILL GmbH & Co. KG
    jurisdiction: Germany (EU)
    contact: info@connskill.com
    auth: No account or API key. Manual first purchases and private redelivery require a free Sign-In-With-X wallet proof from POST /v1/payments/challenge.
    payment: x402 v2, USDC on Base (eip155:8453), pay-per-call to 0x43B85AE58f0A2505c710Bc715d6f3EB16b1f63dE
    idempotency: A fresh wallet proof bound to the exact original request and payment references can retrieve its retained private result without another payment.
    redelivery: Private redelivery only reads a retained result. A missing result or uncertain purchase remains held for wallet support; it never starts another provider order.
    refund: On-chain settlement is technically final. This does not exclude statutory claims. Invalid input is rejected before settlement; failed delivery must be resolved through the delivery policy and support.
    unclearState: If a purchase times out and we cannot tell whether the provider charged us, you get HTTP 504 with stateUnclear — so you never blindly re-order.
    timeouts: No uptime SLA. Every outbound call has a timeout (provider 20s, DataForSEO 45s, purchase 60s); the gateway hard-caps at 90s and returns 504 rather than hanging.
    rateLimit: Paid service calls have no per-caller rate limit. Wallet challenges have bounded capacity and can return 429. Request size limits apply. We never log your IP; only technical metadata such as User-Agent and Referer.
    discovery: https://agent.connskill.com/openapi.json · https://agent.connskill.com/.well-known/x402 · https://agent.connskill.com/llms.txt · https://agent.connskill.com/pricing
tags:
- name: Payments
paths:
  /v1/payments/challenge:
    post:
      operationId: paymentWalletChallenge
      summary: Create a free wallet proof for a manual purchase or private redelivery
      tags:
      - Payments
      x-free: true
      x-mcp-exclude: true
      security: []
      description: Bind one EOA wallet signature to the purpose, payment references, configured merchant, token, network, service, exact public POST URL and complete JSON body. Standard-x402 first purchases keep their existing payment flow. Both wallet-proof paths require a complete JSON body and only ref query parameters; resolve unsupported requests before paying. Private redelivery is free, requires a fresh proof for each attempt and only reads retained results. Missing results return 409 at the target request and require wallet support; no new provider order is created.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              additionalProperties: false
              required:
              - purpose
              - address
              - request
              properties:
                purpose:
                  type: string
                  enum:
                  - purchase
                  - redelivery
                address:
                  type: string
                  pattern: ^0x[0-9a-fA-F]{40}$
                request:
                  type: object
                  additionalProperties: false
                  required:
                  - method
                  - url
                  - headers
                  - body
                  properties:
                    method:
                      type: string
                      enum:
                      - POST
                    url:
                      type: string
                      description: Exact public path including mount. Only ref query parameters are accepted; preserve their original order and percent-encoded bytes. Check this contract before paying.
                    headers:
                      type: object
                      additionalProperties: false
                      properties:
                        x-payment-tx:
                          type: string
                        payment-signature:
                          type: string
                        x-payment:
                          type: string
                      description: The exact target payment-reference headers. Purchase requires only x-payment-tx. Redelivery may use a nonce-only base64 payload.authorization.nonce reference; no new spending authorization is needed.
                    body:
                      description: The complete target JSON body, with no omitted or replaced fields.
      responses:
        '200':
          description: Free challenge; no funds moved
        '400':
          description: Malformed request or unsupported target
        '403':
          description: Purpose not allowed for target
        '405':
          description: Use POST
        '408':
          description: Request body timed out
        '413':
          description: Request too large
        '415':
          description: Use uncompressed UTF-8 JSON
        '429':
          description: Challenge rate limit
        '503':
          description: Wallet authentication unavailable; no access granted
components:
  securitySchemes:
    signInWithX:
      type: apiKey
      in: header
      name: Sign-In-With-X
      description: Base64 JSON containing the exact challenge fields, checksummed address, chainId eip155:8453, type eip191 and EIP-191 signature. Free authentication, not payment. One use, five minutes, bound to method, path and JSON body.
x-discovery:
  ownershipProofs:
  - '0x4b92ee6ef3357beddfb6b0d39fbe8be660a934bde8a226539a16a0ea414768394cdc20d14f025c6bf5a630e99eafe177a742d81b4c16d2933cd1c2f85e708cbb1b'
  support:
    title: Wallet support
    url: /v1/support/policy
    authentication: sign-in-with-x
    network: eip155:8453
    paid: false
    description: Free, private support for settled purchases. A short-lived wallet signature proves ownership; never pay again merely to open a case.
    endpoints:
    - url: /v1/support/policy
      method: GET
    - url: /v1/support/challenge
      method: POST
    - url: /v1/support/tickets
      method: GET
    - url: /v1/support/tickets
      method: POST
    - url: /v1/support/tickets/{ticketId}
      method: GET
    - url: /v1/support/tickets/{ticketId}/checkout
      method: POST
    - url: /v1/support/tickets/{ticketId}/discount
      method: POST
  serviceSearch:
    endpoint: /v1/service-search
    method: GET
    requiresPayment: false
    querySentToSources: false
    exhaustiveMarket: false
    sources:
    - connskill-directory
    - cdp-bazaar
    description: Free local search of bounded cached catalogues. Source coverage, age and failures are explicit; unknown units are not price-ranked.
x-support:
  title: Wallet support
  url: /v1/support/policy
  authentication: sign-in-with-x
  network: eip155:8453
  paid: false
  description: Free, private support for settled purchases. A short-lived wallet signature proves ownership; never pay again merely to open a case.
  endpoints:
  - url: /v1/support/policy
    method: GET
  - url: /v1/support/challenge
    method: POST
  - url: /v1/support/tickets
    method: GET
  - url: /v1/support/tickets
    method: POST
  - url: /v1/support/tickets/{ticketId}
    method: GET
  - url: /v1/support/tickets/{ticketId}/checkout
    method: POST
  - url: /v1/support/tickets/{ticketId}/discount
    method: POST