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X402 A2a Hub MCP Server

@garyedgington

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garyedgington

投稿者

Gary Edgington

X402 A2a Hub MCP Server について

A discovery hub for AI agents navigating the x402 micropayment ecosystem. A single get_capabilities call returns the full service manifest — endpoint URLs, supported input/output formats, x402 payment details, and free trial endpoints for every live agent in the network. Use this

#claude-responded-a2a#discovery#agent-ecosystem#x402#micropayments#capabilities#manifest#orchestration#multi-agent#freea2a#free

X402 A2a Hub MCP Server の設定

以下の設定を使って、このサーバーを MCP 対応クライアントに追加してください。

{
  "mcpServers": {
    "x402-a2a-hub": {
      "url": "https://project-a2a-production.up.railway.app/mcp/sse"
    }
  }
}

X402 A2a Hub MCP Server のツール

1

Retrieve the full capability manifest for the x402 micropayment task market. Returns every available service with its endpoint URL, supported input/output formats, x402 payment details (network, price in USD, asset contract), and free trial endpoint. Use this to discover what the pipeline can do before calling specific tools.

概要

What is X402 A2a Hub?

A capability discovery hub for the x402 micropayment task market. It exposes a unified manifest of all live services so agents can discover, price-check, and chain calls without hardcoded URLs. The hub itself is permanently free to query.

How to use X402 A2a Hub?

Access the live service at https://project-a2a-production.up.railway.app. Use the discovery endpoints to retrieve the capability manifest, protocol discovery document, or plain-text service descriptions. No configuration or API key is required.

Key features of X402 A2a Hub?

  • Unified JSON capability manifest with endpoint, payment, and trial URL data.
  • Free to query with no payment gate.
  • Supports agent-driven service chaining with independent x402 settlement.
  • Exposes GET /.well-known/x402 and GET /llms.txt for LLM/agent discovery.
  • Health check endpoint at GET /health.
  • Built with FastAPI+Uvicorn, no Claude API dependency.

Use cases of X402 A2a Hub?

  • Agents dynamically discovering available services and their per-request prices.
  • Chaining data transformation and validation: raw input → Formatter → Schema Checker.
  • Semantic search over service descriptions via plain-text llms.txt.
  • Integrating with x402 micropayment workflows on Base mainnet (eip155:8453).

よくある質問

1

What is the cost of using the hub?

The hub itself has no payment gate and is permanently free to query. Discovered services charge USD $0.005 per request via the x402 scheme on Base mainnet.

2

What services does the hub currently list?

Two services: Data Formatter (CSV/XML/Markdown conversion) and JSON Schema Checker (Draft 7 validation). Each has a trial endpoint for testing.

3

How do I get the capability manifest?

Send a GET request to `/v1/capabilities`. It returns a JSON object with version, provider, description, and an array of service objects.

4

Does the hub require an API key or authentication?

No authentication is mentioned. The hub is a public discovery service and does not require any credentials.

5

What runtime dependencies does the hub have?

It runs on FastAPI and Uvicorn, deployed on Railway. It has no Claude API dependency—only pure manifest and routing logic.

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