Agent Card Health Check
https://agent-card-health-check.kadopi.workers.dev/mcp ↗
Description
Free no-storage MCP that checks A2A Agent Card connection readiness for authorized targets.
What our measurements say
Agent Card Health Check is a remote MCP server published at agent-card-health-check.kadopi.workers.dev. It has been probed 6 times since 9/14/2026. It answered in 6 of them (100.0%), a near-uninterrupted record. Median response time is 623 ms, a delay an agent will notice. It offers a narrow, focused set of 1 tools. On the protocol side it speaks the 2026-07-28 stateless spec.
Agent readability score
Can an LLM agent pick the right tool here — names, descriptions and parameter clarity are assessed.
Agent readability score
Strengths
- Tool name explicitly indicates its diagnostic purpose.
- Parameters clearly mark required/optional fields.
Weaknesses
- Description is in Japanese, reducing accessibility for English-speaking agents.
- Parameter schema lacks detailed property definitions (e.g., agentCard object structure).
- No documentation of error conditions or constraints.
diagnose_agent_card— Description uses Japanese, limiting usability for non-Japanese agents.diagnose_agent_card— Parameter types (e.g., agentCard object) lack detailed schema definitions.
Verdict
Event narrative
Risk: low
Advice
Schema compliance
tools/list structure, inputSchema validity, and a functional smoke test — the components of the 0-100 score.
- tools/list schema valid
- inputSchema is valid JSON Schema
- Smoke test not run this round
- Cold-start: cold 45ms → warm 41ms (penalty 4ms)
Tools
Tools the server advertised in the latest measurement — measured, not catalog-claimed.
diagnose_agent_card所有または接続を明示許可されたA2Aエージェントについて、Agent Card宣言と非更新の実接続結果を照合します。
agentCardobjectrequiredauthorizedTargetUrlstringrequiredauthorizationobject
Availability history
Event log
Derived by comparing consecutive probes — changes in era, protocol version, build and reachability.
- Added to watch — era: Dual-era
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[](https://mcpmetrics.io/servers/io-github-kadopi-agent-card-health-check)<a href="https://mcpmetrics.io/servers/io-github-kadopi-agent-card-health-check"><img src="https://mcpmetrics.io/badge/io.github.kadopi/agent-card-health-check/era.svg" alt="mcpmetrics"></a>You are seeing the last 7 days. Sign up for the full history. Which check failed and why is in the dashboard.
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