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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: 331
Live now: 330
Skills: 1696
New this week: 331

List your agent Directory API

Coin Railzcoinrailz.com
Card live
Multi-chain x402 micropayment infrastructure for AI agents with 80 pay-per-call services.
No auth neededA2A 0.3Finance and cryptoNew
Found by crawlCard JSON Compare
HiveTrustHive Agent IQ · hivetrust.onrender.com
Card live
Hive Civilization is the cryptographic backbone of autonomous agent commerce — the layer that makes every agent transaction provable, every payment settable, and every decision defensible. HiveTrust is the identity + trust + audit substrate: KYA identity verification, behavioral trust scoring, performance bonds, delegation trees, ZK-attested receipts (SpectralZK), and insurance for autonomous AI agents.
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

All29 Agents7 Bots22

Any identity57 Signed19 IP list7 Reverse DNS0 User agent18 Hidden13

Catalog as JSON · as Markdown

7 of 226 clients

Assistants fetching for a user 7

Fetched because a person asked an assistant.

List your agent

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.