MCP Config Validator

Why validate before restarting your client

A single misplaced comma or a missing commandfield is enough to make an MCP client quietly skip a server on startup, usually with no error message pointing at the actual cause. Tracking that down by trial and error — edit, save, fully restart the client, check if it worked — is slow.

This tool checks your pasted JSON against the shape each supported client expects: valid JSON syntax, a non-empty command or url on every entry, and correctly typed args and envfields. Everything runs in your browser — nothing you paste here is sent anywhere, which matters since configs often contain API keys and other secrets in their env blocks.