A2A Agent Card (/.well-known/agent.json) & MCP Manifest Validator
Inspect, compare, and validate Google Agent-to-Agent (A2A) discovery cards, Anthropic Streamable HTTP MCP manifests, and OpenAPI 3.1 tool schemas.
| Protocol Standard | Discovery Path | Transport / Format | Primary Agent Consumers | Live Status |
|---|---|---|---|---|
| Google A2A Agent Card | /.well-known/agent.json |
JSON Skills & MIME Modes | Multi-agent orchestrators & A2A routers | 200 OK |
| Anthropic MCP Discovery | /.well-known/mcp |
JSON-RPC 2.0 Streamable HTTP (POST /mcp) |
Cursor, Claude Desktop, Claude Code, VS Code | 200 OK |
| llmstxt.org Corpus | /llms.txt & /llms-full.txt |
Markdown + Accept: text/markdown |
ChatGPT Search, Perplexity, Claude SearchBot | 200 OK |
| OpenAPI 3.1 Spec | /openapi.json |
REST JSON + RFC 9457 Problem Details | Function-calling LLMs & CI SDK generators | 200 OK |
Google A2A Protocol (/.well-known/agent.json)
{
"schemaVersion": "1.0",
"name": "AgenticPulse Auditor Agent",
"url": "https://neatjar.com/agentic-pulse/",
"version": "1.0.0",
"defaultInputModes": ["application/json", "text/plain"],
"defaultOutputModes": ["application/json", "text/markdown"],
"authentication": { "schemes": ["none"] }
}
MCP Server Discovery (/.well-known/mcp)
{
"mcpVersion": "2025.3.26",
"protocolVersion": "2024.9.5",
"name": "agentic-pulse-mcp",
"transport": {
"type": "streamable-http",
"url": "https://neatjar.com/agentic-pulse/mcp"
}
}