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OpenAPI Specification

openapi: 3.2.0
info:
  title: Crypto Data Wallet Auth API
  description: 'Real-time crypto market intelligence API. Built for AI agents: gasless USDC payments via x402 protocol, one-call onboarding, and 180+ endpoints for prices, derivatives, funding, and sentiment.'
  version: '2026-10-28'
servers:
- url: https://cryptodataapi.com
tags:
- name: Wallet Auth
  description: Wallet-signature login — challenge, verify, session.
paths:
  /api/v1/wallet/challenge:
    post:
      tags:
      - Wallet Auth
      summary: Create Challenge
      description: 'Issue an EIP-4361 (Sign-In with Ethereum) challenge for a wallet address.


        Sign `message` verbatim with personal_sign (EIP-191) and send the signature

        plus `nonce` to /wallet/verify before `expires_at`. The nonce is single-use.'
      operationId: create_challenge_api_v1_wallet_challenge_post
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ChallengeRequest'
        required: true
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ChallengeResponse'
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
  /api/v1/wallet/verify:
    post:
      tags:
      - Wallet Auth
      summary: Verify Signature
      description: Verify an EIP-191 signature and return/create an API key.
      operationId: verify_signature_api_v1_wallet_verify_post
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/VerifyRequest'
        required: true
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/VerifyResponse'
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
  /api/v1/wallet/session:
    get:
      tags:
      - Wallet Auth
      summary: Get Session
      description: Get wallet session info for the current API key.
      operationId: get_session_api_v1_wallet_session_get
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
      security:
      - APIKeyHeader: []
components:
  schemas:
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
    ValidationError:
      properties:
        loc:
          items:
            anyOf:
            - type: string
            - type: integer
          type: array
          title: Location
        msg:
          type: string
          title: Message
        type:
          type: string
          title: Error Type
        input:
          title: Input
        ctx:
          type: object
          title: Context
      type: object
      required:
      - loc
      - msg
      - type
      title: ValidationError
    VerifyRequest:
      properties:
        wallet_address:
          type: string
          pattern: ^0x[a-fA-F0-9]{40}$
          title: Wallet Address
        signature:
          type: string
          title: Signature
        nonce:
          type: string
          title: Nonce
        message:
          title: Message
          type:
          - string
          - 'null'
      type: object
      required:
      - wallet_address
      - signature
      - nonce
      title: VerifyRequest
    ChallengeResponse:
      properties:
        message:
          type: string
          title: Message
        nonce:
          type: string
          title: Nonce
        expires_at:
          title: Expires At
          type:
          - string
          - 'null'
          format: date-time
      type: object
      required:
      - message
      - nonce
      title: ChallengeResponse
    ChallengeRequest:
      properties:
        wallet_address:
          type: string
          pattern: ^0x[a-fA-F0-9]{40}$
          title: Wallet Address
        chain_id:
          title: Chain Id
          type:
          - integer
          - 'null'
      type: object
      required:
      - wallet_address
      title: ChallengeRequest
    VerifyResponse:
      properties:
        api_key:
          type: string
          title: Api Key
        tier:
          type: string
          title: Tier
        expires_at:
          title: Expires At
          type:
          - string
          - 'null'
          format: date-time
      type: object
      required:
      - api_key
      - tier
      title: VerifyResponse
  securitySchemes:
    APIKeyHeader:
      type: apiKey
      in: header
      name: X-API-Key