Checked Yours? MCP Server Cards, counted twice

说明与用途

2026年10月，MCP服务器拥有有效Server Card的比例从1.9%升至2.7%，拥有有效卡的服务器数量增长了66%。大多数卡仍缺少必要的CORS头，且许多返回HTML而非JSON。

问题

Remote MCP servers rarely have valid Server Cards, limiting AI app connectivity.

结果

The share of hosts with a valid Server Card rose from 1.9% to 2.7% in eight days, and hosts with a valid card increased by 66%. Most cards still lack required CORS headers, and many serve HTML instead of JSON.

工作流

• Read entire MCP Registry and keep latest version of each server with a remote endpoint.
• For each endpoint, perform read‑only GET and OPTIONS requests as a client would.
• Count responses that return a Server Card JSON, validate schema, and check CORS headers.
• Repeat the same process eight days later to capture changes.
• Use the mcp-server-card-check tool to identify failures and provide fixes.
• Publish a shared test suite for future conformance.
• Encourage server operators to run the checker and fix reported issues.

证据

The share of hosts with a valid card rose from 1.9% to 2.7%.

来源

The registry added 18% more hosts in eight days.

来源

Hosts with a valid card went from 352 to 586, up 66%.

来源

The checker was v0.4.1.

来源