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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.

With a card: 349
Live now: 329
Skills: 1813
New this week: 1

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Vaultfire Agent HubVaultfire Protocol · theloopbreaker.com
Card live
Trust and accountability records for AI agents. Live V2 contracts are read through public APIs, and V2 write calls return unsigned transactions that the caller signs (paid x402 routes; not production-verified). Vaultfire V3 is published for source review only: not deployed, payments and funds disabled. The read-only MCP server exposes 5 tools and cannot sign, pay or execute V3.
No auth neededA2A 0.3Security and identity
Found by crawlCard JSON Compare

Crawlers, bots and libraries we detect

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

All24 Agents13 Bots11

Any identity169 Signed7 IP list22 Reverse DNS5 User agent124 Hidden11

Catalog as JSON · as Markdown

11 of 226 clients

Scraping services 8

Rented scraping, usually disguised.

Automation tools 3

Headless browsers and drivers.

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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.