keygate

keygate

Monetize your MCP server: API keys, plans, usage metering, and rate limits for any server built on the official @modelcontextprotocol/sdk — fully local, no cloud account required.

import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
import { withKeygate, fileKeyStore } from "keygate";

const gated = withKeygate(server, {
  keyStore: fileKeyStore("./keygate-keys.json"),
  freeTools: ["search"],
  paidTools: { generate_report: { plan: "pro" } },
  limits: { pro: { unitsPerDay: 1000 } },
  upgradeUrl: "https://example.com/upgrade",
});

await gated.connect(new StdioServerTransport());

Create keys with the bundled CLI: npx keygate keys create --plan pro.

Full documentation: https://github.com/AliHaram/keygate