x402 Discovery MCP

The x402 ecosystem's biggest friction point has been supply-side: getting an API behind x402 payments requires understanding EIP-712 headers, facilitator registration, and settlement logic. ScoutGate removes all of it. It is available as a remote MCP endpoint.

Teams that want a hosted endpoint instead of running a local process. The project is written in Python.

VERIFIED ACTIVE

LAST COMMIT 2026-03-11 · ★ 4 · #831 OF 848 MAINTAINED OTHER · VERIFIED 2026-08-25

MIT · Python servers · how we verify → /methodology

01 · Install x402 Discovery MCP

before you install - you'll need

The README does not document required environment variables for a basic install.

Claude Code

claude mcp add rplryan-x402-discovery-mcp --transport sse https://x402-scout-relay.onrender.com/sse

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "rplryan-x402-discovery-mcp": {
      "url": "https://x402-scout-relay.onrender.com/sse"
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

https://x402-scout-relay.onrender.com/sse

transport: sse

endpoint NOT responding · probed 2026-08-25

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as remote - your agent's requests go to x402-scout-relay.onrender.com

license MIT - declared in the repository

registry namespace io.github.rplryan is GitHub-verified and matches the repo owner

03 · What x402 Discovery MCP can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Latest releases

v1.0.0-demo · 2026-03-02

Promotional demo video and screenshots for the x402 Service Discovery MCP server (claude.ai Connectors submission).

v1.2.0 · 2026-03-01

x402 Service Discovery MCP v1.2.0 · What’s New · Streamable HTTP MCP endpoint at - compatible with Claude Connectors and remote MCP clients · EdDSA-signed attestations via GET /v1/attest/:serviceId - JWT attestations…

v1.0.0 · 2026-02-26

x402 Service Discovery MCP Server v1.0.0 · Discover, evaluate, and route across 251+ x402-enabled payment services. The community discovery layer for the x402 agentic economy. · 6 MCP Tools · | Tool | Cost |…

04 · Who maintains x402 Discovery MCP

x402 Discovery MCP is maintained by rplryan. It's the only MCP server we track from this author; the repo dates to Feb 2026.

05 · Facts

repository: github.com/rplryan/x402-discovery-mcp
website: https://x402scout.com/
category: other - ranked #831 of 848 actively-maintained other servers as of 2026-08-25.
registry: io.github.rplryan/x402-discovery-mcp (active, first published 2026-02-26 · 6 versions)

06 · x402 Discovery MCP FAQ

What is x402 Discovery MCP?

Is x402 Discovery MCP still maintained?

Yes - as of 2026-08-25, its last commit was 2026-03-11. We re-verify nightly.

How do I install x402 Discovery MCP?

Run `claude mcp add rplryan-x402-discovery-mcp --transport sse https://x402-scout-relay.onrender.com/sse`. The README does not document required environment variables for a basic install. You can also paste the ready-made client config above.

07 · Alternatives to x402 Discovery MCP

Alternatives to x402 Discovery MCP

Maintained other servers if x402 Discovery MCP isn't the fit.

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