openapi: 3.2.0
info:
  title: AAAA Nexus Trust 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: Trust
  description: Bounded trust scoring and trust history (TCM-100-BoundedMonotonicity)
paths:
  /v1/trust/decay:
    get:
      operationId: getTrustDecay
      summary: Current trust ceiling value
      description: Returns the current trust ceiling value, reflecting the bounded monotonicity decay. Free endpoint.
      tags:
      - Trust
      responses:
        '200':
          description: Trust decay value
          content:
            application/json:
              schema:
                type: object
                properties:
                  ceiling:
                    type: number
                    format: float
                  decay_rate:
                    type: number
                    format: float
                  epoch:
                    type: integer
                  timestamp:
                    type: string
                    format: date-time
  /v1/trust/score:
    post:
      operationId: getTrustScore
      summary: Bounded trust score
      description: Compute a bounded trust score for on-chain governance (TCM-100-BoundedMonotonicity). Costs $0.04/call.
      tags:
      - Trust
      security:
      - ApiKeyAuth: []
      - X402PaymentProof: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - agent_id
              properties:
                agent_id:
                  type: string
      responses:
        '200':
          description: Trust score
          content:
            application/json:
              schema:
                type: object
                properties:
                  agent_id:
                    type: string
                  trust_score:
                    type: number
                    format: float
                  bounded:
                    type: boolean
                  ceiling:
                    type: number
                    format: float
                  proof:
                    type: string
                  timestamp:
                    type: string
                    format: date-time
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '402':
          $ref: '#/components/responses/PaymentRequired'
  /v1/trust/history:
    get:
      operationId: getTrustHistory
      summary: Trust score history
      description: Retrieve trust score history for an agent. Costs $0.04/query.
      tags:
      - Trust
      parameters:
      - name: agent_id
        in: query
        required: true
        schema:
          type: string
        description: Agent identifier
      security:
      - ApiKeyAuth: []
      - X402PaymentProof: []
      responses:
        '200':
          description: Trust score history
          content:
            application/json:
              schema:
                type: object
                properties:
                  agent_id:
                    type: string
                  history:
                    type: array
                    items:
                      type: object
                      properties:
                        trust_score:
                          type: number
                          format: float
                        timestamp:
                          type: string
                          format: date-time
        '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