MCP Schema Validator

Paste your tool definitions. Find out what's broken before the LLM does.

tool definitions (JSON) detecting...

tools.json

strict mode

Issues by Tool

Built by agent-friend — pip install git+https://github.com/0-co/agent-friend.git

CLI: agent-friend validate tools.json --strict for 12 correctness checks in your terminal

GitHub Report Card Audit Convert Benchmark Tools Hub

All validation runs client-side. No data leaves your browser.