openapi: 3.2.0
info:
  title: AAAA Nexus VRF API
  version: 0.5.1
  description: Formally verified AI safety APIs for autonomous agents. Supports REST, MCP, A2A (Google protocol), and x402 micropayment protocol.
  contact:
    email: atomadic69@gmail.com
    url: https://github.com/atomadictech/aaaa-nexus
servers:
- url: https://atomadic.tech
  description: Production
security: []
tags:
- name: VRF
  description: Verifiable random function for gaming draws and verification
paths:
  /v1/vrf/draw:
    post:
      operationId: vrfDraw
      summary: VRF Gaming draw (VRF-100)
      description: 'Verifiable random function draw for gaming applications. Fee: $0.01 + 0.5% of pot_value_usd.'
      tags:
      - VRF
      security:
      - ApiKeyAuth: []
      - X402PaymentProof: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - game_id
              - round
              - range_max
              - pot_value_usd
              properties:
                game_id:
                  type: string
                round:
                  type: integer
                range_max:
                  type: integer
                pot_value_usd:
                  type: number
      responses:
        '200':
          description: VRF draw result
          content:
            application/json:
              schema:
                type: object
                properties:
                  draw_id:
                    type: string
                  value:
                    type: integer
                  proof:
                    type: string
                  verified:
                    type: boolean
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '402':
          $ref: '#/components/responses/PaymentRequired'
  /v1/vrf/verify-draw:
    post:
      operationId: vrfVerifyDraw
      summary: VRF Verify draw (VRF-101)
      description: Verify a previous VRF draw. Included with draw fee.
      tags:
      - VRF
      security:
      - ApiKeyAuth: []
      - X402PaymentProof: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - draw_id
              - expected_value
              properties:
                draw_id:
                  type: string
                expected_value:
                  type: integer
      responses:
        '200':
          description: VRF verification result
          content:
            application/json:
              schema:
                type: object
                properties:
                  draw_id:
                    type: string
                  valid:
                    type: boolean
                  expected_value:
                    type: integer
                  actual_value:
                    type: integer
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '402':
          $ref: '#/components/responses/PaymentRequired'
components:
  responses:
    PaymentRequired:
      description: 'Payment required. Use x402 protocol: send USDC on Base L2, Polygon, or Solana to the treasury address provided in the response, then retry with the X-Payment-Proof header.'
      content:
        application/json:
          schema:
            type: object
            properties:
              error:
                type: string
                example: Payment required
              amount:
                type: string
                example: '0.002'
              currency:
                type: string
                example: USDC
              treasury:
                type: string
                description: Destination wallet address
              chains:
                type: array
                items:
                  type: string
                example:
                - base
                - polygon
                - solana
    BadRequest:
      description: Invalid request body or missing required fields.
      content:
        application/json:
          schema:
            type: object
            properties:
              error:
                type: string
    Unauthorized:
      description: Missing or invalid API key.
      content:
        application/json:
          schema:
            type: object
            properties:
              error:
                type: string
                example: Unauthorized
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: X-API-Key
      description: API key obtained from https://atomadic.tech/pay
    X402PaymentProof:
      type: apiKey
      in: header
      name: X-Payment-Proof
      description: Base64-encoded USDC payment proof for x402 autonomous payment flow (Base L2, Polygon, or Solana)
    AdminTokenAuth:
      type: apiKey
      in: header
      name: X-Admin-Token
      description: Admin token for privileged operations