It sounds like a House of Cards. Is it?

Описание и применение

Многие серверы MCP и агенты A2A не реализуют корректные цифровые визитки, что приводит к ненадёжному обнаружению. Автор проверил 50 серверов, нашёл только один корректный, выявил недостающие заголовки, исправил их и подтвердил соответствие спецификации SEP‑2127.

Задача

Many MCP servers and A2A agents lack or misimplement their digital business cards (Server Cards/Agent Cards), leading to unreliable discovery and connection.

Результат

The author demonstrated that a small sample of MCP servers largely lacked compliant Server Cards, identified specific header failures, corrected them, and verified compliance, illustrating the importance of checking and maintaining card validity.

Рабочий процесс

• Sample MCP Registry for public servers
• Request each server’s card at the spec‑reserved URL
• Validate card against SEP‑2127 required headers
• Identify missing headers
• Fix server configuration to include required headers
• Redeploy server
• Re‑validate card to ensure compliance

Доказательства

I took a sample of the official MCP Registry: about 50 servers with a public address. I asked each one for its card at the address the spec reserves for it.

Источник

One had one. And it was a good one: small and tidy, listed in the site's own AI Catalog, with an AGENTS.md for agents to read.

Источник

It failed two of the spec's required checks. Two headers a browser needs, to read the card and to ask politely whether it had changed, were both missing.

Источник

I fixed them and redeployed the same day. Checked again: no required failures.

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