Developer tools

MCP configuration checker

Check a declared portable JSON configuration subset without running servers.

Processed locally

Static checking only, not validation for every MCP client or a connection test. Up to 100,000 characters, 100 servers and 64 nesting levels. Nothing is fetched, executed or logged.

Your answer will appear here.

Help and method

Use mcpServers with named entries: command plus optional args/env/type=stdio, or url plus optional headers/type=http. Unknown fields warn. Duplicate keys are rejected. Review secrets in arguments, environment, headers and URLs before sharing outside this local tool.

Methods and reliability

Worked example

An example you can try or adapt to your own values.

JSON configuration: {"mcpServers":{"local":{"command":"node"},"remote":{"url":"https://example.com/mcp"}}}

Result

No issues in the declared subset

Worked example

Result

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