KnownFix MCP Connection Kit

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Connection snippets

HTTP request details

POST

Content-Type: application/json
Accept: application/json, text/event-stream

Protocol example: 2025-06-18. Client configuration schemas vary; JSON-RPC bodies are not configuration files. Requests are not sent by this page.

Check JSON configuration

Configuration stays in this browser. It is not saved or uploaded. This is a structure check, not a live connection or security audit.

Worked examples and expected results

Synthetic fixtures checked against this tool's current local logic. They are not live connection or delivery tests.

When to investigate further

Structure passed, connection failed
Separate schema validation from transport, authorization and initialization evidence. A passing local check does not contact the server.
Which configuration format applies?
Use the format documented for your client. The generic remote example and the VS Code example are not interchangeable.
Read the companion guide: MCP Connection Troubleshooting: Config, Transport and Initialization