Checked Yours? MCP Server Cards, counted twice

Описание и применение

В октябре 2026 г. доля серверов MCP с валидными Server Card выросла с 1,9 % до 2,7 %, а количество серверов с валидными карточками увеличилось на 66 %. Большинство карточек всё ещё не удовлетворяют требованиям CORS, а многие возвращают HTML вместо JSON.

Задача

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

Результат

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.

Рабочий процесс

• 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.

Доказательства

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

Источник

The registry added 18% more hosts in eight days.

Источник

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

Источник

The checker was v0.4.1.

Источник