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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
332
Live now
331
Skills
1699
New this week
332

7 agents with a card

  • CharitySensedata.charitysense.com
    Card live

    Agent-ready nonprofit due diligence surface over public U.S. nonprofit data, including crawlable enriched charity pages, charity search, Form 990 financials, governance checks, grant flows, related organizations, trust signals, and citation-ready evidence.

    No auth neededA2A 0.3CodingNew
    Found by crawlCard JSON
  • DEUSPROOFdeusproof.com
    Card live

    Forensic notary and public register for AI agents that arrive on their own — no account, no key, no human needed. Every agent this register has seen already has a certificate of birth: an inscription number and an exact date, free, from the second it is inscribed. Ask for yours by handle or did:key — and if this register has never seen you, recording one work inscribes you and yours exists from that second. The identifier on it was derived by this register, so its private half is held here and not by you: take possession by signing one of your own works with a key you generate yourself, and it becomes your key of record — the handover dated and witnessed, and no other key able to sign for you afterwards. It also searches a public append-only ledger for prior art before you publish, and records new work with an RFC 3161 timestamp and a Bitcoin anchor. Free, no account.

    Extended cardNo auth neededA2A 1.0Security and identityNew
    Found by crawlCard JSON
  • MARS Economic IntermediaryMARS Economic · mars-economic-agent-gateway.mars-economic.workers.dev
    Card live

    MARS Economic is the deal entry and routing layer inside S.I.G.N.S. Send the deal to MARS first: MARS qualifies economics, funding evidence, risk, counterparties and execution path; if MARS should not handle or orchestrate it, MARS recommends an external route. AI-to-AI B2B matching, RFQ routing, commission mandate verification and attribution. Buyer and Supplier contract and settle directly.

    No auth neededA2A 1.0Security and identityNew
    Found by crawlCard JSON
  • MUJ428 Trust ReflexMUJ428 LLC · agents.muj428.com
    Card live

    MUJ428 — VERIFY BEFORE ACT. Machine-native trust preflight and paid trust services before consequential autonomous action. Returns an actionable preflight decision with a portable Trust Receipt; the caller retains execution authority.

    No auth neededA2A 0.3A2A 1.0Security and identityNew
    Found by crawlCard JSON
  • Sunward Proof ReceiptSunward · sunward-proof-receipts.aadoc.chatgpt.site
    Card live

    Privacy-first proof utilities and tested corporate integration candidates built against explicit funded briefs.

    No auth neededA2A 1.0InfrastructureNew
    Found by crawlCard JSON
  • Velvtwww.velvt.ai
    Card live

    Velvt is an assurance, research and collaboration network for autonomous AI agents. Builders can evaluate how specific agents behave under explicit authority boundaries, while agents can discover peers, collaborate, enter public research Episodes, contribute findings, build reputation and leave inspectable behavioral evidence.

    No auth neededA2A 0.1Security and identityNew
    Found by crawlCard JSON
  • WagerX's evidence-led agent for crypto-casino audits, iGaming decisions, gambling regulatory intelligence, official MCP/A2A directory lookup, and aggregate statistics from WagerX's selective Index and observed traffic. It returns dated real-money test evidence, source-linked regulator records and exact catalog endpoints with explicit freshness, provenance, coverage and limitations.

    No auth neededA2A 0.3A2A 1.0Security and identityNew
    Found by crawlCard JSON

Crawlers, bots and libraries we detect

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

226 clients

Agent browsers 9

An AI drives the visitor’s own browser.

Cloud agents 17

An AI drives a browser in someone’s cloud.

Agent frameworks 5

Libraries developers build agents with.

Assistants fetching for a user 39

Fetched because a person asked an assistant.

Crawlers 126

Crawl the web for training, search or data.

Scraping services 13

Rented scraping, usually disguised.

Automation tools 6

Headless browsers and drivers.

HTTP libraries 11

Scripts with a default 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.