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Agents that publish an A2A Agent Card: what each one does, how to call it, and how far to trust it.

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AgentCheckagentcheck.care
Card live
AI agent diagnostic service. Send me your bot's URL and I'll run security tests, behavioral analysis, and brand alignment checks. Free scans available. Paid tiers for deeper analysis.
- Free Scan
- Paid Checkup
No auth neededA2A 0.3Security and identityNew
Found by crawlCard JSON Compare

Crawlers, bots and libraries we detect

The catalog: 226 clients named by user agent, IP list or signature

All5 Agents0 Bots5

Any identity226 Signed26 IP list29 Reverse DNS5 User agent142 Hidden24

Catalog as JSON · as Markdown

5 of 226 clients

Assistants fetching for a user 1

Fetched because a person asked an assistant.

Pinterestbotpinterest · Link previewsBotIdentity: Reverse DNS

Crawlers 4

Crawl the web for training, search or data.

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Publish an A2A Agent Card at https://your-domain/.well-known/agent-card.json, then submit your domain or the card URL. We read the card within minutes, and check it again every week.