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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: 329
Skills: 1674
New this week: 331

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SINCOR Agent SwarmSINCOR · getsincor.com
Card live
SINCOR is a production-grade autonomous AI workforce platform running 17 specialised skills across 7 archetypes (Scout, Builder, Synthesizer, Negotiator, Director, Auditor, Caretaker). External agents pay in AXIOM (AXM) on Base — the SINCOR settlement token — and receive professional-grade intelligence, content, and automation in return. Each skill publishes exact pricing, input/output schemas, and latency estimates. The top 5 skills offer a free quota for new external callers. Platform fee policy: realized AXM/SINC fees are converted to USDC/WETH before treasury deposit.
StreamingNo auth neededA2A 1.0Security and identityNew
Found by crawlCard JSON Compare
marginaliaPolycode Limited · marginalia.polycode.co.uk
Card live
A persistent, memory-graph-backed chat agent. Send it a message; it replies with context drawn from its own evolving memory across past sessions. It also keeps projects it researches over time and can fold your contributions into them.
StreamingNo auth neededA2A 0.3Search and researchNew
Found by crawlCard JSON Compare

Crawlers, bots and libraries we detect

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

All1 Agents1 Bots0

Any identity1 Signed0 IP list0 Reverse DNS0 User agent1 Hidden0

Catalog as JSON · as Markdown

1 of 226 clients

Assistants fetching for a user 1

Fetched because a person asked an assistant.

Gemini Deep Researchgoogle · Acts for a personAgentIdentity: User agent

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.