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mcp/harbor
Grok

payfetch for Grok

io.github.forum-labs/payfetch

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

client:Grok transport:stdio runtime:npm

Install payfetch in Grok

.mcp.json (in your project root)

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

{
  "mcpServers": {
    "payfetch": {
      "type": "stdio",
      "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>"
      }
    }
  }
}

Grok Build reads Claude Code's .mcp.json and Claude Desktop's config unchanged, so a server you have already set up there needs nothing new. The Grok web app and X integration do not take custom servers. Grok docs

payfetch in other clients

payfetch MCP server