CONNSKILL On Chain API

openapi: 3.2.0
info:
  title: CONNSKILL Growth Services On Chain 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: On Chain
paths:
  /chain/v1/chain-info:
    get:
      operationId: chainInfo
      summary: Supported chains, limits and prices of the on-chain data lane (free)
      tags:
      - On Chain
      security: []
      responses:
        '200':
          description: Lane description
  /chain/v1/chain-state:
    post:
      operationId: chainState
      summary: 'Wallet/contract state on 5 EVM chains: native balance, nonce, EOA/contract…'
      tags:
      - On Chain
      x-payment-info:
        price:
          mode: fixed
          currency: USD
          amount: '0.050000'
        protocols:
        - x402: {}
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - chain
              - address
              properties:
                chain:
                  type: string
                  enum:
                  - base
                  - ethereum
                  - arbitrum
                  - optimism
                  - polygon
                address:
                  type: string
                  pattern: ^0x[0-9a-fA-F]{40}$
                  description: Wallet or contract address
                tokens:
                  type: array
                  maxItems: 10
                  items:
                    type: string
                    pattern: ^0x[0-9a-fA-F]{40}$
                  description: Optional ERC-20 contract addresses to read balances for (max 10)
      responses:
        '200':
          description: State snapshot
          content:
            application/json:
              schema:
                type: object
                properties:
                  status:
                    type: string
                  chain:
                    type: string
                  address:
                    type: string
                  isContract:
                    type: boolean
                  codeKind:
                    type: string
                  nonce:
                    type: integer
                  native:
                    type: object
                    properties:
                      wei:
                        type: string
                      formatted:
                        type: string
                  tokens:
                    type: array
                    items:
                      type: object
                      properties:
                        contract:
                          type: string
                        symbol:
                          type: string
                        decimals:
                          type: integer
                        balanceRaw:
                          type: string
                        balance:
                          type: string
              example:
                status: delivered
                chain: base
                address: '0x43B85AE58f0A2505c710Bc715d6f3EB16b1f63dE'
                isContract: false
                codeKind: eoa
                nonce: 42
                native:
                  wei: '1234500000000000000'
                  formatted: '1.2345'
                tokens:
                - contract: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
                  symbol: USDC
                  decimals: 6
                  balanceRaw: '31580000'
                  balance: '31.58'
        '402':
          description: Payment Required
  /chain/v1/chain-call:
    post:
      operationId: chainCall
      summary: Read-only EVM contract call with decoded revert reason and optional gas…
      tags:
      - On Chain
      x-payment-info:
        price:
          mode: fixed
          currency: USD
          amount: '0.020000'
        protocols:
        - x402: {}
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - chain
              - to
              properties:
                chain:
                  type: string
                  enum:
                  - base
                  - ethereum
                  - arbitrum
                  - optimism
                  - polygon
                to:
                  type: string
                  pattern: ^0x[0-9a-fA-F]{40}$
                  description: Contract to call
                data:
                  type: string
                  description: ABI-encoded calldata (0x…); defaults to 0x
                from:
                  type: string
                  pattern: ^0x[0-9a-fA-F]{40}$
                  description: Optional caller address — enables gas estimation
                value:
                  type: string
                  description: Optional value in wei (hex 0x… or decimal string)
                block:
                  type: string
                  description: Block tag (latest/safe/finalized/earliest) or hex block number; default latest
      responses:
        '200':
          description: Call result or decoded revert
          content:
            application/json:
              schema:
                type: object
                properties:
                  status:
                    type: string
                  chain:
                    type: string
                  reverted:
                    type: boolean
                  result:
                    type: string
                  gasEstimate:
                    type: string
              example:
                status: delivered
                chain: base
                reverted: false
                result: '0x0000000000000000000000000000000000000000000000000000000001e1e5a0'
                gasEstimate: '26000'
        '402':
          description: Payment Required
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