Atomadic Tech

Atomadic Tech Protocol API

Protocol discovery endpoints: MCP and A2A agent card

GitHub OpenAPI

Operations 6

GET /.well-known/agent.json A2A agent card #
GET /.well-known/mcp.json MCP server manifest #
GET /.well-known/ai-plugin.json OpenAI plugin manifest #
GET /.well-known/agent-card.json Alternative A2A agent card path #
POST /mcp MCP server endpoint #
POST /a2a A2A agent-to-agent endpoint #

Documentation

📖
Documentation
https://atomadic.tech/quickstart
📖
APIReference
https://atomadic.tech/openapi.json

Specifications

⚙
OpenAPI
https://raw.githubusercontent.com/api-evangelist/atomadic-tech/refs/heads/main/openapi/atomadic-tech-protocol-api-openapi.yml

Other Resources

🔗
ErrorCatalog
https://raw.githubusercontent.com/api-evangelist/atomadic-tech/refs/heads/main/errors/atomadic-tech-problem-types.yml
🔗
DataModel
https://raw.githubusercontent.com/api-evangelist/atomadic-tech/refs/heads/main/data-model/atomadic-tech-data-model.yml
🔗
AgentCard
https://raw.githubusercontent.com/api-evangelist/atomadic-tech/refs/heads/main/a2a/atomadic-tech-a2a.yml

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This API 
curl "https://apis.io/api/v1/apis/atomadic-tech:atomadic-tech-protocol-api"
All apis 
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

atomadic-tech-protocol-api-openapi.yml Raw ↑ 
openapi: 3.2.0
info:
  title: AAAA Nexus Protocol 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: Protocol
  description: 'Protocol discovery endpoints: MCP and A2A agent card'
paths:
  /.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:
      - Protocol
      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:
      - Protocol
      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:
      - Protocol
      responses:
        '200':
          description: OpenAI plugin 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:
      - Protocol
      responses:
        '200':
          description: A2A agent card
          content:
            application/json:
              schema:
                type: object
  /mcp:
    post:
      operationId: mcpEndpoint
      summary: MCP server endpoint
      description: 'Model Context Protocol (MCP) endpoint. Available tools: health, metrics, oracle_entropy, oracle_hallucination, ratchetgate_session, ratchetgate_register, ratchetgate_advance, inference, inference_stream.'
      tags:
      - Protocol
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
      responses:
        '200':
          description: MCP response
          content:
            application/json:
              schema:
                type: object
  /a2a:
    post:
      operationId: a2aEndpoint
      summary: A2A agent-to-agent endpoint
      description: 'Google Agent-to-Agent (A2A) protocol endpoint. Supports methods: message/send, tasks/get.'
      tags:
      - Protocol
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - jsonrpc
              - method
              - id
              properties:
                jsonrpc:
                  type: string
                  enum:
                  - '2.0'
                method:
                  type: string
                  enum:
                  - message/send
                  - tasks/get
                params:
                  type: object
                id:
                  type: string
            example:
              jsonrpc: '2.0'
              method: message/send
              params:
                message:
                  role: user
                  parts:
                  - type: text
                    text: Check health
              id: '1'
      responses:
        '200':
          description: A2A JSON-RPC response
          content:
            application/json:
              schema:
                type: object
                properties:
                  jsonrpc:
                    type: string
                  result:
                    type: object
                  id:
                    type: string
components:
  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