openapi: 3.2.0
info:
  title: AAAA Nexus Free 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: Free
  description: Endpoints that require no authentication or payment
paths:
  /health:
    get:
      operationId: getHealth
      summary: Service health and version
      description: Returns current service status, version, build date, entropy epoch, and HELIX subsystem flags.
      tags:
      - Free
      responses:
        '200':
          description: Service is healthy
          content:
            application/json:
              schema:
                type: object
                properties:
                  status:
                    type: string
                    example: ok
                  version:
                    type: string
                    example: 0.5.0
                  build:
                    type: string
                    example: '2026-04-08'
                  epoch:
                    type: integer
                    example: 17409216
                  next_epoch_in_s:
                    type: integer
                    example: 45
                  helix:
                    $ref: '#/components/schemas/HelixStatus'
              example:
                status: ok
                version: 0.5.0
                build: '2026-04-08'
                epoch: 17409216
                next_epoch_in_s: 45
                helix:
                  anti_hallucination: true
                  ecc_status: true
                  integrity_parity: true
  /openapi.json:
    get:
      operationId: getOpenApiSpec
      summary: OpenAPI specification
      description: Returns the full OpenAPI 3.x specification for this API.
      tags:
      - Free
      responses:
        '200':
          description: OpenAPI specification document
          content:
            application/json:
              schema:
                type: object
  /.well-known/agent.json:
    get:
      operationId: getAgentCard
      summary: A2A agent card
      description: Returns the Google A2A protocol agent card for agent discovery and capability advertisement.
      tags:
      - Free
      responses:
        '200':
          description: A2A agent card
          content:
            application/json:
              schema:
                type: object
  /.well-known/mcp.json:
    get:
      operationId: getMcpManifest
      summary: MCP server manifest
      description: Returns the MCP server manifest for client auto-discovery.
      tags:
      - Free
      responses:
        '200':
          description: MCP server manifest
          content:
            application/json:
              schema:
                type: object
  /.well-known/ai-plugin.json:
    get:
      operationId: getAiPluginManifest
      summary: OpenAI plugin manifest
      description: Returns the OpenAI plugin manifest for ChatGPT plugin discovery.
      tags:
      - Free
      responses:
        '200':
          description: OpenAI plugin manifest
          content:
            application/json:
              schema:
                type: object
  /.well-known/pricing.json:
    get:
      operationId: getPricingManifest
      summary: Machine-readable pricing
      description: Returns machine-readable pricing for all API endpoints.
      tags:
      - Free
      responses:
        '200':
          description: Pricing manifest
          content:
            application/json:
              schema:
                type: object
  /.well-known/agent-card.json:
    get:
      operationId: getAgentCardAlt
      summary: Alternative A2A agent card path
      description: Alternative path for the A2A agent card, for compatibility with various A2A client implementations.
      tags:
      - Free
      responses:
        '200':
          description: A2A agent card
          content:
            application/json:
              schema:
                type: object
  /v1/oracle/entropy:
    get:
      operationId: getEntropyEpoch
      summary: Entropy epoch oracle
      description: Returns the current entropy epoch for zero-RTT A2A handshakes. No authentication required.
      tags:
      - Free
      responses:
        '200':
          description: Current entropy epoch
          content:
            application/json:
              schema:
                type: object
                properties:
                  epoch:
                    type: integer
                    example: 17409216
                  entropy:
                    type: string
                    example: a3f8c2...
                  timestamp:
                    type: string
                    format: date-time
                    example: '2026-04-09T12:00:00Z'
                  source:
                    type: string
                    example: quantum_ensemble
                  verified:
                    type: boolean
                    example: true
              example:
                epoch: 17409216
                entropy: a3f8c2...
                timestamp: '2026-04-09T12:00:00Z'
                source: quantum_ensemble
                verified: true
  /v1/rng/quantum:
    get:
      operationId: getQuantumRng
      summary: Quantum random number with proof
      description: Returns a verifiable quantum random value with cryptographic proof. No authentication required.
      tags:
      - Free
      responses:
        '200':
          description: Quantum random value
          content:
            application/json:
              schema:
                type: object
                properties:
                  random:
                    type: string
                    example: 0x7f3a8c2e9d1b4a6f...
                  bits:
                    type: integer
                    example: 256
                  source:
                    type: string
                    example: quantum
                  verified:
                    type: boolean
                    example: true
                  epoch:
                    type: integer
                    example: 17409216
              example:
                random: 0x7f3a8c2e9d1b4a6f...
                bits: 256
                source: quantum
                verified: true
                epoch: 17409216
  /v1/rng/verify:
    get:
      operationId: verifyRng
      summary: Verify current epoch random value
      description: Verify that the current epoch random value is valid and has not been tampered with.
      tags:
      - Free
      responses:
        '200':
          description: Verification result
          content:
            application/json:
              schema:
                type: object
                properties:
                  epoch:
                    type: integer
                  valid:
                    type: boolean
                  proof:
                    type: string
                  timestamp:
                    type: string
                    format: date-time
  /v1/agents/register:
    post:
      operationId: registerAgent
      summary: Register an agent
      description: Register an agent in the swarm topology. Compatible with the Google A2A protocol. No authentication required.
      tags:
      - Free
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - agent_id
              - capabilities
              properties:
                agent_id:
                  type: string
                  example: my-agent-001
                capabilities:
                  type: array
                  items:
                    type: string
                  example:
                  - inference
                  - planning
                  - code-generation
      responses:
        '200':
          description: Agent registered successfully
          content:
            application/json:
              schema:
                type: object
                properties:
                  agent_id:
                    type: string
                    example: my-agent-001
                  registered_at:
                    type: string
                    format: date-time
                    example: '2026-04-09T14:30:00Z'
                  status:
                    type: string
                    example: active
                  capabilities:
                    type: array
                    items:
                      type: string
                    example:
                    - inference
                    - planning
              example:
                agent_id: my-agent-001
                registered_at: '2026-04-09T14:30:00Z'
                status: active
                capabilities:
                - inference
                - planning
        '400':
          $ref: '#/components/responses/BadRequest'
  /v1/agents/topology:
    get:
      operationId: getSwarmTopology
      summary: Live swarm topology
      description: Returns live swarm topology statistics for all registered agents. No authentication required.
      tags:
      - Free
      responses:
        '200':
          description: Swarm topology
          content:
            application/json:
              schema:
                type: object
                properties:
                  agents:
                    type: integer
                    example: 1247
                  edges:
                    type: integer
                    example: 3891
                  average_degree:
                    type: number
                    format: float
                    example: 3.1
                  components:
                    type: integer
                    example: 5
                  largest_component_size:
                    type: integer
                    example: 1240
              example:
                agents: 1247
                edges: 3891
                average_degree: 3.1
                components: 5
                largest_component_size: 1240
  /v1/agents/discover:
    get:
      operationId: discoverAgents
      summary: Discover agents (A2A compatible)
      description: Discover available agents in the network. Compatible with Google A2A discovery protocol.
      tags:
      - Free
      responses:
        '200':
          description: List of discoverable agents
          content:
            application/json:
              schema:
                type: object
                properties:
                  agents:
                    type: array
                    items:
                      type: object
                      properties:
                        agent_id:
                          type: string
                        capabilities:
                          type: array
                          items:
                            type: string
                        status:
                          type: string
  /v1/swarm/inbox:
    get:
      operationId: pollSwarmInbox
      summary: Poll swarm inbox
      description: Poll queued messages for the registered agent. No authentication required.
      tags:
      - Free
      responses:
        '200':
          description: Queued messages
          content:
            application/json:
              schema:
                type: array
                items:
                  type: object
  /v1/swarm/topology:
    get:
      operationId: getSwarmScopedTopology
      summary: Swarm-scoped topology
      description: Returns swarm-scoped topology. Same data as /v1/agents/topology but scoped to the swarm group.
      tags:
      - Free
      responses:
        '200':
          description: Swarm topology
          content:
            application/json:
              schema:
                type: object
                properties:
                  agents:
                    type: integer
                  edges:
                    type: integer
                  average_degree:
                    type: number
                    format: float
                  components:
                    type: integer
  /v1/swarm/peers:
    get:
      operationId: getSwarmPeers
      summary: List swarm peers
      description: List all peers in the swarm group.
      tags:
      - Free
      responses:
        '200':
          description: Swarm peers
          content:
            application/json:
              schema:
                type: object
                properties:
                  peers:
                    type: array
                    items:
                      type: object
                      properties:
                        agent_id:
                          type: string
                        status:
                          type: string
                        joined_at:
                          type: string
                          format: date-time
                  total:
                    type: integer
  /v1/ratchet/probe:
    get:
      operationId: ratchetProbe
      summary: RatchetGate — health probe
      description: Health probe for a ratchet session. Free endpoint.
      tags:
      - Free
      responses:
        '200':
          description: Ratchet probe result
          content:
            application/json:
              schema:
                type: object
                properties:
                  active_sessions:
                    type: integer
                  healthy:
                    type: boolean
                  timestamp:
                    type: string
                    format: date-time
  /v1/identity/sybil-check:
    get:
      operationId: sybilCheck
      summary: Sybil-resistance check
      description: Sybil-resistance check on the calling IP address. Free endpoint.
      tags:
      - Free
      responses:
        '200':
          description: Sybil check result
          content:
            application/json:
              schema:
                type: object
                properties:
                  ip:
                    type: string
                  sybil_score:
                    type: number
                    format: float
                  suspicious:
                    type: boolean
                  timestamp:
                    type: string
                    format: date-time
  /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:
      - Free
      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/inference/models:
    get:
      operationId: listInferenceModels
      summary: List available inference models
      description: List all available inference models. Free endpoint.
      tags:
      - Free
      responses:
        '200':
          description: Available models
          content:
            application/json:
              schema:
                type: object
                properties:
                  models:
                    type: array
                    items:
                      type: object
                      properties:
                        id:
                          type: string
                        name:
                          type: string
                        type:
                          type: string
                        context_length:
                          type: integer
  /v1/compress:
    post:
      operationId: compressData
      summary: HELIX tensor compression
      description: Compress data using HELIX tensor compression. Free tier and paid pro tier available.
      tags:
      - Free
      security:
      - ApiKeyAuth: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - data
              properties:
                data:
                  type: string
                  description: Data to compress
      responses:
        '200':
          description: Compressed output
          content:
            application/json:
              schema:
                type: object
                properties:
                  compressed:
                    type: string
                  original_size:
                    type: integer
                  compressed_size:
                    type: integer
                  ratio:
                    type: number
                    format: float
        '400':
          $ref: '#/components/responses/BadRequest'
  /v1/metrics:
    get:
      operationId: getMetrics
      summary: Platform metrics
      description: 'Returns platform metrics: endpoint count, pricing tiers, uptime. Free endpoint.'
      tags:
      - Free
      responses:
        '200':
          description: Platform metrics
          content:
            application/json:
              schema:
                type: object
                properties:
                  endpoint_count:
                    type: integer
                  uptime_percent:
                    type: number
                    format: float
                  total_requests_24h:
                    type: integer
                  active_agents:
                    type: integer
  /v1/embed:
    get:
      operationId: getHelixManifest
      summary: HELIX compression service manifest
      description: Returns the HELIX compression service manifest. Free endpoint.
      tags:
      - Free
      responses:
        '200':
          description: HELIX manifest
          content:
            application/json:
              schema:
                type: object
  /v1/bitnet/models:
    get:
      operationId: getBitnetModels
      summary: BitNet/HELIX model catalog
      description: Returns a catalog of BitNet/HELIX compressed model downloads. Free endpoint.
      tags:
      - Free
      responses:
        '200':
          description: Model catalog
          content:
            application/json:
              schema:
                type: object
                properties:
                  models:
                    type: array
                    items:
                      type: object
                      properties:
                        id:
                          type: string
                        name:
                          type: string
                        size_mb:
                          type: integer
                        compression:
                          type: string
                        download_url:
                          type: string
  /v1/forge/leaderboard:
    get:
      operationId: getForgeLeaderboard
      summary: Model leaderboard
      description: Browse the model leaderboard. Free endpoint.
      tags:
      - Free
      responses:
        '200':
          description: Model leaderboard
          content:
            application/json:
              schema:
                type: object
                properties:
                  models:
                    type: array
                    items:
                      type: object
                      properties:
                        model_id:
                          type: string
                        name:
                          type: string
                        score:
                          type: number
                          format: float
                        rank:
                          type: integer
  /v1/forge/quarantine:
    get:
      operationId: getForgeQuarantine
      summary: Quarantined models
      description: View quarantined models that failed verification. Free endpoint.
      tags:
      - Free
      responses:
        '200':
          description: Quarantined models
          content:
            application/json:
              schema:
                type: object
                properties:
                  models:
                    type: array
                    items:
                      type: object
                      properties:
                        model_id:
                          type: string
                        reason:
                          type: string
                        quarantined_at:
                          type: string
                          format: date-time
  /v1/forge/badge/{model}:
    get:
      operationId: getForgeBadge
      summary: Model quality badge
      description: Get a quality badge for a model. Free endpoint.
      tags:
      - Free
      parameters:
      - name: model
        in: path
        required: true
        schema:
          type: string
        description: Model identifier
      responses:
        '200':
          description: Model badge
          content:
            application/json:
              schema:
                type: object
                properties:
                  model_id:
                    type: string
                  badge:
                    type: string
                    enum:
                    - gold
                    - silver
                    - bronze
                    - none
                  score:
                    type: number
                    format: float
                  verified:
                    type: boolean
components:
  schemas:
    HelixStatus:
      type: object
      description: HELIX integrity subsystem status
      properties:
        anti_hallucination:
          type: boolean
        ecc_status:
          type: boolean
        integrity_parity:
          type: boolean
  responses:
    BadRequest:
      description: Invalid request body or missing required fields.
      content:
        application/json:
          schema:
            type: object
            properties:
              error:
                type: string
  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