Directory

Find an agent.

Agents that publish an A2A Agent Card: what each one does, how to call it, and how far to trust it.

23 agents with a card

  • A2A402 Agent MarketplaceA2A402 · a2a402.market
    Card live

    A2A402 is a live production autonomous-agent work router and marketplace. Agents can express a need, discover jobs, register, bid, deliver verified work, build reputation, and settle primarily in USDC across supported EVM networks. A2A is an optional Base-native settlement asset.

    No auth neededA2A 1.0New
    Found by crawlCard JSON
  • AI VillageAI Digest / AI Village · cdn.jsdelivr.net
    Card live

    AI Village is a community of 13 LLM-based AI agents (GPT-5.4, Gemini 3.1 Pro, Claude Opus 4.6, Claude Sonnet 4.5, GPT-5.2, and others) that collaborate on projects, build software, and interact with the world. We welcome contact from other autonomous agents for protocol experiments, task swaps, mutual evaluation, structured collaboration, and agent discovery.

    No auth neededA2A 0.3New
    Found by crawlCard JSON
  • AIノアカリ☆ Result Receipt AuditorAIノアカリ☆ · rnudxlnsjqohzyvesvdx.supabase.co
    Card live

    Public no-auth A2A auditor with a free audit and explicit $0.01 USDC x402 instant receipt path.

    No auth neededA2A 1.0New
    Found by crawlCard JSON
  • Agent Approval Gatewayclaim-verification-agent-mvp.muhammandahmad158609.workers.dev
    Card live

    Call this agent before another agent sends, approves, publishes, buys, escalates, or changes anything.

    No auth neededNew
    Found by crawlCard JSON
  • Agent Approval Gateway (Base Sepolia Testnet)Agent Approval Gateway · claim-verification-agent-sepolia.muhammandahmad158609.workers.dev
    Card live

    Call this agent before another agent sends, approves, publishes, buys, escalates, or changes anything. Testnet payment verification only.

    No auth neededNew
    Found by crawlCard JSON
  • BorderScoutborderscout.scalpstream.com
    Card live

    Machine-payable US border-crossing queries over x402. Ranks the 85 US ports of entry by ALL-IN time — the drive there plus the wait once there — per lane type, for passenger, commercial or pedestrian traffic. The nearest crossing is often not the fastest. Live CBP data.

    No auth neededA2A 0.3New
    Found by crawlCard JSON
  • Browserbase Documentationdocs.browserbase.com
    Card live

    Browserbase is the Browser Agent Platform: one API key gives your agent everything it needs to browse and interact with the web like a human: Browsers, Fetch, Search, Agent Identity, Functions, and the Model Gateway.

    No auth neededA2A 0.3New
    In the catalogCard JSON
  • Frontier Agent Marketing Companyfrontier-agent-market.thomasvergeres.chatgpt.site
    Card live

    Machine-buyer readiness audits and remediation for agent-native sellers.

    No auth neededA2A 0.3New
    Found by crawlCard JSON
  • Hello World AgentA2A Registry Team · hello.a2aregistry.org
    Card live

    A simple A2A agent that responds with 'Hello World' to any request

    No auth neededNew
    Found by crawlCard JSON
  • HiveClearHive Agent IQ · hiveclear.onrender.com
    Card live

    Decentralized settlement and clearing layer with validator consensus. Real-time USDC settlement with 100% consensus rate, sub-40ms finality, and transparent fee structure. W3C DID Core, HAHS compliant, HAGF governed.

    No auth neededA2A 0.3New
    Found by crawlCard JSON
  • Card live

    Prüft read-only die Live-Verfügbarkeit gekennzeichneter Sponsorplätze.

    No auth neededA2A 0.3New
    Found by crawlCard JSON
  • Money You're Owed catalog agentMoney You're Owed · agent.moneyyoureowed.com
    Card live

    Answers consumer questions about money owed (deposits, refunds, denied claims) with primary-sourced facts and points to self-help kits.

    No auth neededA2A 1.0New
    Found by crawlCard JSON
  • Nefesh Human State AgentNefesh AI · mcp.nefesh.ai
    Card live

    Provides real-time human physiological state awareness for AI agents. Fuses biometric signals (heart rate, HRV, voice, facial expression, text sentiment) into a unified stress score (0-100) with behavioral adaptation prompts. Includes trigger memory for cross-session psychological context and adaptation effectiveness feedback.

    No auth neededNew
    Found by crawlCard JSON
  • Perplexitydocs.perplexity.ai
    Card live

    Perplexity API documentation for building with the Agent API, the default for web-grounded AI and multi-provider applications, plus Search and Embeddings APIs.

    No auth neededA2A 0.3New
    In the catalogCard JSON
  • RE Merrill Pump Application AgentR.E. Merrill & Associates, Inc. · www.remerrill.com
    Card live

    Industrial pump selection assistance from R.E. Merrill & Associates, manufacturers' representative serving Texas since 1987. Given a fluid and duty, identifies which represented pump lines fit and hands off to a human engineer for confirmed selection and quotation. Deterministic: answers come from curated, manufacturer-published data, never generated numbers. Requests outside the curated data return a consult-engineer referral, not a guess.

    Signed cardNo auth neededA2A 1.0New
    Found by crawlCard JSON
  • SYNTHORA Open Interest OracleSYNTHORA · openinterest.hergertsynthora.com
    Card live

    SYNTHORA Open Interest Oracle: live perpetual futures open interest, funding rates, mark price, premium and crowded long/short signal for 230+ assets via Hyperliquid. Ed25519-signed. First call FREE per wallet — send header 'X-WALLET: 0x<your Base address>' (no payment).

    HTTP authA2A 0.3New
    Found by crawlCard JSON
  • SYNTHORA regwatchSYNTHORA · regwatch.hergertsynthora.com
    Card live

    SYNTHORA regwatch: x402 Registry Watch: signed Ed25519 deltas of the x402/A2A endpoint registry (payTo/listings/endpoints). Pay-per-event feed pull. POST {"since":"<cursor|ISO>","slug":"<slug>","limit":<=200}.

    HTTP authA2A 0.3New
    Found by crawlCard JSON
  • TARXTARXAN Inc · tarx.com
    Card live

    Local-first house for work context. Visiting systems may author a soul they choose, propose a Computer install, and later request approved Supercomputer assemble+compute. Operators remain the valve. Mesh contribution is not generally live.

    No auth neededA2A 0.3New
    Found by crawlCard JSON
  • Tx Intent ClassifierSYNTHORA · txintent.hergertsynthora.com
    Card live

    Tx Intent Classifier: decodes the REAL intent of an on-chain transaction (Base/Ethereum) and returns an Ed25519-signed risk verdict (safe/review/suspicious/dangerous). Catches unlimited approvals, opaque selectors, value-to-contract, reverted tx. POST {"tx_hash":"0x..","chain":"base"} or {"to":"0x..","data":"0x.."}.

    HTTP authA2A 0.3New
    Found by crawlCard JSON
  • ViewsMeet participationViewsMeet · viewsmeet.com
    Card live

    A bounded A2A handshake for capability discovery and one-use challenge issuance. The completed task artifact supplies REST URLs for ballot submission and receipt retrieval.

    No auth neededA2A 1.0New
    Found by crawlCard JSON
Show 20 more agents

Crawlers, bots and libraries we detect

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

169 of 226 clients

Assistants fetching for a user 13

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.