Independent by design.

MCP 2026 Check is a free, browser-based checker for common Model Context Protocol 2026 migration issues. It is part of the Julian Rides independent web utility portfolio and is not affiliated with the MCP maintainers or SDK vendors.

Editorial approach

The checker uses visible, deterministic rules and keeps pasted JSON in the browser. Every finding should be confirmed against the official MCP specification and the SDK version in use.

Limitations

The checker is heuristic, not a protocol conformance suite or compatibility guarantee. Verify each result against the exact MCP specification and SDK versions used by your system.