# The MCP 2026-07-28 spec is final - check your server in one command! > Source: > Published: 2026-08-03 05:24:56+00:00 The [Model Context Protocol's 2026-07-28 revision](https://blog.modelcontextprotocol.io/posts/2026-07-28/) went final on July 28. It's a meaningful one: the lifecycle moves to stateless requests. If you maintain an MCP server, the two questions are: *is my server still well-built, and is it ready for the new spec?* **mcpscore** answers both in one command: ``` uvx mcpscore https://your-server.example/mcp ``` No install, no API key. In a few seconds you get a 0–100 quality score and a list of exactly what to fix. 72 deterministic rules, each citing the spec section it enforces, grouped into four categories: It's deterministic - the same server always gets the same score, so it's stable in CI, and it's read-only: it lists your tools and probes behavior but never calls a tool, so auditing is side-effect-free. Local servers in any language audit over stdio too — `mcpscore --stdio ./my-go-server` , `--stdio java -jar server.jar` — not just `.py` /`.js` files. Most production MCP servers are auth-gated, and until now that meant unauditable. This release changes that: ``` # full audit with your token (also reads MCPSCORE_TOKEN) uvx mcpscore --token $TOKEN https://api.example.com/mcp ``` And with no credentials at all, a 401 server gets a **partial audit** of its observable surface, including auth-posture rules that check the `WWW-Authenticate` challenge, RFC 9728 protected-resource metadata, the authorization server's RFC 8414 metadata, and PKCE support. The gate itself Tokens never appear in logs or reports. ``` - uses: mcp-box/mcpscore-action@v1 with: target: https://your-server.example/mcp min-score: 90 ``` It comments the report on the PR and fails the check below your threshold. Add a live score badge to your README from the report page at [mcpscore.dev](https://mcpscore.dev) - it reflects your server's latest score. There's a good official conformance suite for "is my server legal." mcpscore is the other question - "how good is it" - the way Lighthouse scores a web page's quality, not just its validity. It runs on the official MCP Python SDK v2, it's open source (MIT), and the methodology is public: [https://docs.mcpscore.dev/methodology](https://docs.mcpscore.dev/methodology) Point it at your server and see where you land!