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MCP configuration diagnostic

MCP Config Validator

Find JSON syntax mistakes and common local MCP server configuration risks before you restart Claude Code, Claude Desktop, Codex, or another coding agent.

Private by design: validation happens in this browser tab. The validator does not upload or store this text. Still, replace real secrets with <redacted>.

Validation results

Results will identify JSON syntax, supported field types, and common launch risks without echoing secret values.

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Configuration valid but the server still fails?

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