MCP Server

tech.vauban/pay-mcp MCP Server

tech.vauban/pay-mcp

Registry

What is the tech.vauban/pay-mcp MCP server?

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

How to install tech.vauban/pay-mcp

Copy-paste configuration for popular MCP clients.

transport: stdio

Config generated by PluginBench — verify against the source before use.

Environment / auth

STARKNET_RPC_URL
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
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
secret
Private key for that account. Optional; never required to try the tools.
PAY_MCP_STANDARD_X402_PAYEES
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
Standard x402 path: cap on one payment in atomic units (default 0.1 STRK).
PAY_MCP_STANDARD_X402_ACCOUNT_ADDRESS
Standard x402 path: a signer of its own (falls back to PAY_MCP_SEPOLIA_*).
PAY_MCP_STANDARD_X402_PRIVATE_KEY
secret
Private key for that account. Optional.

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

{
  "mcpServers": {
    "pay-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@vauban-pay/mcp"
      ],
      "env": {
        "STARKNET_RPC_URL": "<YOUR_STARKNET_RPC_URL>",
        "PAY_MCP_SEPOLIA_ACCOUNT_ADDRESS": "<YOUR_PAY_MCP_SEPOLIA_ACCOUNT_ADDRESS>",
        "PAY_MCP_SEPOLIA_PRIVATE_KEY": "<YOUR_PAY_MCP_SEPOLIA_PRIVATE_KEY>",
        "PAY_MCP_STANDARD_X402_PAYEES": "<YOUR_PAY_MCP_STANDARD_X402_PAYEES>",
        "PAY_MCP_STANDARD_X402_MAX_WEI": "<YOUR_PAY_MCP_STANDARD_X402_MAX_WEI>",
        "PAY_MCP_STANDARD_X402_ACCOUNT_ADDRESS": "<YOUR_PAY_MCP_STANDARD_X402_ACCOUNT_ADDRESS>",
        "PAY_MCP_STANDARD_X402_PRIVATE_KEY": "<YOUR_PAY_MCP_STANDARD_X402_PRIVATE_KEY>"
      }
    }
  }
}

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