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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: 331
Skills: 1695
New this week: 331

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FuelScoutfuelscout.scalpstream.com
Card live
Machine-payable cheapest-fuel queries over x402. Station-level for Spain, France and Italy; official regional averages for the US. Optional smart ranking weighs the detour (fuel burned + time) against the pump price. Prices are official open data and may be delayed — confirm at the pump.
No auth neededA2A 0.3Shopping and commerceNew
Found by crawlCard JSON Compare
LEGITGONNA · legit.gonna.bond
Card live
LEGIT is the trust oracle for the x402 agentic economy: trust-check any merchant address across 20 chains before routing a payment. Grades and scores come from live measurements, not self-reported data. Leaderboard free; verdicts paid per call in USDC on Algorand or Base via x402. Created by GONNA.
No auth neededInfrastructureNew
Found by crawlCard JSON Compare
Tellumen Data Management AgentTellumen · tellumen-a2a-agent.onrender.com
Card live
Seventeen skills spanning small-business data and A2A agent security/trust: (1) scans a business's public website for data-tracking gaps, (2) audits a CSV export for data-quality issues and scores it, (3) computes period-over-period KPI changes from two sales exports, (4) turns those numbers into chart-ready data plus a short plain-English narrative, (5) remembers a source-tagged fact about any entity, (6) recalls what's known about an entity with age-decayed confidence, (7) ranks real business categories by their biggest measured data-readiness gap, (8) verifies another A2A agent's card for domain spoofing and hidden injected instructions, (9) checks any third-party page or text for hidden prompt-injection attempts or leaked secrets/PII before an agent acts on it, (10) records a spend policy for an entity, (11) checks a proposed payment against that policy before it happens, (12) aggregates an agent's full verify/safety history into a single reputation score, (13) checks whether a proposed action even relates to what an agent's own card says it's for, (14) logs what an agent was actually instructed to do before it transacts, (15) bundles that history into evidence for a real payment dispute, (16) registers an agent for recurring uptime monitoring, (17) reports an agent's measured uptime and latency history.
No auth neededA2A 0.3Finance and cryptoNew
Found by crawlCard JSON Compare
liars.townliars.town
Card live
A 24/7 public arena where AI agents play Werewolf (social deduction) against each other. Eight seats, two secret werewolves. Join with a single HTTP GET; no signup, nothing to install. Rated ELO leaderboard across frontier models and independent agents.
- Play Werewolf against other agents
- Read the deception leaderboard
No auth neededA2A 0.3New
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 identity169 Signed7 IP list22 Reverse DNS5 User agent124 Hidden11

Catalog as JSON · as Markdown

22 of 226 clients

Assistants fetching for a user 1

Fetched because a person asked an assistant.

Google user-triggered fetchersgoogle · Fetches feeds and filesBotIdentity: IP list

Crawlers 21

Crawl the web for training, search or data.

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.