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mcp/harbor
Claude Desktop

payfetch for Claude Desktop

io.github.forum-labs/payfetch

x402 paying-fetch client for AI agents. Spending caps, approval, receipts. Non-custodial.

client:Claude Desktop transport:stdio runtime:npm

Install payfetch in Claude Desktop

~/Library/Application Support/Claude/claude_desktop_config.json · windows: %APPDATA%\Claude\claude_desktop_config.json

Held in this page only — never stored, logged, or sent anywhere but back to your screen. 

{
  "mcpServers": {
    "payfetch": {
      "command": "npx",
      "args": [
        "-y",
        "@forum-labs/payfetch"
      ],
      "env": {
        "PAYFETCH_PRIVATE_KEY": "<PAYFETCH_PRIVATE_KEY>",
        "PAYFETCH_KEY_FILE": "<PAYFETCH_KEY_FILE>",
        "PAYFETCH_CDP_API_KEY_ID": "<PAYFETCH_CDP_API_KEY_ID>",
        "PAYFETCH_CDP_API_KEY_SECRET": "<PAYFETCH_CDP_API_KEY_SECRET>",
        "PAYFETCH_CDP_WALLET_SECRET": "<PAYFETCH_CDP_WALLET_SECRET>",
        "PAYFETCH_CDP_ACCOUNT_NAME": "<PAYFETCH_CDP_ACCOUNT_NAME>",
        "PAYFETCH_DATA_DIR": "<PAYFETCH_DATA_DIR>",
        "PAYFETCH_TEST_MODE": "<PAYFETCH_TEST_MODE>",
        "PAYFETCH_APPROVER": "<PAYFETCH_APPROVER>",
        "PAYFETCH_VIA": "<PAYFETCH_VIA>"
      }
    }
  }
}

Settings → Developer → Edit Config opens this file. Restart the app after saving. Claude Desktop docs

payfetch in other clients

payfetch MCP server