How do I install pay-mcp?

Pick a client above and copy the generated config. Cursor and VS Code also have a deep link when the server can run locally or remotely.

No. Registry-listed is not the same as vendor-official. Read the methodology for the difference.

How is the trust score calculated?

This listing scores 50 (Fair). The formula is published on the methodology page.

MCPpedia

pay-mcp MCP Server — Install for Claude, Cursor & VS Code | MCPpedia

pay-mcp MCP Server

x402 tools for MCP clients: pay exact/Starknet or STARK-receipt 402s, verify, JCS-hash. No account.

Tools Versions Alternatives

Registry

50Fair

Install

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "vauban-pay-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@vauban-pay/mcp@0.7.1"
      ],
      "env": {
        "STARKNET_RPC_URL": "",
        "PAY_MCP_SEPOLIA_ACCOUNT_ADDRESS": "",
        "PAY_MCP_SEPOLIA_PRIVATE_KEY": "YOUR_PAY_MCP_SEPOLIA_PRIVATE_KEY",
        "PAY_MCP_STANDARD_X402_PAYEES": "",
        "PAY_MCP_STANDARD_X402_MAX_WEI": "",
        "PAY_MCP_STANDARD_X402_ACCOUNT_ADDRESS": "",
        "PAY_MCP_STANDARD_X402_PRIVATE_KEY": "YOUR_PAY_MCP_STANDARD_X402_PRIVATE_KEY"
      }
    }
  }
}

Install guide

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Environment

Name	Required	Notes
STARKNET_RPC_URL	No	Starknet Sepolia RPC endpoint for the two chain-reading tools. Optional; defaults to a public node not operated by Vauban.
PAY_MCP_SEPOLIA_ACCOUNT_ADDRESS	No	Starknet Sepolia account address enabling make_payment chain mode. Optional; without it make_payment returns a hash-only pending result with no network call.
PAY_MCP_SEPOLIA_PRIVATE_KEY	No	Private key for that account. Optional; never required to try the tools. Secret.
PAY_MCP_STANDARD_X402_PAYEES	No	Standard x402 path: comma-separated payTo addresses pay_for_resource may pay, or * for any. Empty pays nobody (fail closed).
PAY_MCP_STANDARD_X402_MAX_WEI	No	Standard x402 path: cap on one payment in atomic units (default 0.1 STRK).
PAY_MCP_STANDARD_X402_ACCOUNT_ADDRESS	No	Standard x402 path: a signer of its own (falls back to PAY_MCP_SEPOLIA_*).
PAY_MCP_STANDARD_X402_PRIVATE_KEY	No	Private key for that account. Optional. Secret.

pay-mcp MCP Server

Install

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