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jwt-tools-mcp

v1.0.1

Published

Decode and verify JSON Web Tokens locally. No network and no key.

Vulnerabilities

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Links

Git

Maintainers

mrfentmenmrfentmen

Keywords

mcpjwttokensauthsecurity

Readme

JWT Tools MCP

Decode and verify JSON Web Tokens on the local machine. No network, no key, the token never leaves the machine.

This file is self contained. It reads public data only and never writes to the machine. All output is bounded and honest about what could not be fetched.

Tools

  • decode Decode header and payload.
  • verify Verify the signature.

Usage

npm install
npm run build
node dist/index.js

Verification uses HMAC-SHA256 with a secret you provide. The token is processed entirely locally.

Premium tools

These tools need a license key:

  • list_signing_keys
  • describe_issuer

Buy a key at https://mcp-marketplace.io/server/io-github-mrfentmen-jwt-tools-mcp and set it in your MCP client config:

"env": { "MCP_LICENSE_KEY": "mcp_live_..." }

The key is checked against MCP Marketplace, cached for 24 hours, and keeps working offline once one check has succeeded. Every other tool on this server stays free.