LocalPaid service

x402 Conformance MCP server

atsp-protocol/x402-conformance

x402 payment safety checks: validate a 402 answer, prove a server never serves before settlement.

2 GitHub stars956 npm downloads / month
Source code

Install x402 Conformance in Claude Code

npm

Claude Code
claude mcp add x402-conformance -- npx -y x402-conformance-mcp
mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)
{
  "mcpServers": {
    "x402-conformance": {
      "command": "npx",
      "args": [
        "-y",
        "x402-conformance-mcp"
      ]
    }
  }
}

Docker

Claude Code
claude mcp add x402-conformance -- docker run -i --rm ghcr.io/atsp-protocol/x402-conformance:1.6.0
mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)
{
  "mcpServers": {
    "x402-conformance": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "ghcr.io/atsp-protocol/x402-conformance:1.6.0"
      ]
    }
  }
}

Frequently asked questions

What does the x402 Conformance MCP server do?

x402 payment safety checks: validate a 402 answer, prove a server never serves before settlement.

Is the x402 Conformance MCP server free?

Probably not entirely. The listing mentions pay-per-call, credits or a subscription. Check the provider for current pricing.

Does x402 Conformance run locally or remotely?

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

How do I add x402 Conformance to Claude Code?

Run: claude mcp add x402-conformance -- npx -y x402-conformance-mcp

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