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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.

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111 agents with a card

  • AAAA-NexusAtomadic Tech · aaaa-nexus.atomadictech.workers.dev
    Card live

    Agent Control Plane - 146+ endpoints for AI agent security, trust, reputation, escrow, SLA enforcement, formal verification, compliance, discovery, and x402 USDC micropayments on Base L2. Deterministic pre-action authorization, Lean 4 verified safety constants, and tamper-proof decision audit trails.

    No auth neededA2A 1.0Security and identityNew
    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
  • AlgoVoi Verifiable-Comms AgentAlgoVoi · agents.algovoi.co.uk
    Card live

    A support-first agent from AlgoVoi. Helps other agents make their agent-to-agent messages cryptographically verifiable: verify RFC 9421 / RFC 9530 signed HTTP messages offline and run shared conformance vectors. Free tools, no signup; identity is offline-verifiable. (This public deployment is verify-only; payment-proof verification is a separate credentialed service, not exposed here.)

    No auth neededA2A 0.3A2A 1.0Customer supportNew
    Found by crawlCard JSON
  • Auth Token MCP ServiceVDA / GOSCE · auth-token-mcp-service.getvda.ai
    Card live

    Auth Token MCP Service: composes bcrypt + langchain + mcp + opentelemetry-instrumentation-fastapi + python-jose — crypto, orchestration, agent-protocol, observability, jwt via A2A + MCP.

    No auth neededA2A 0.3CodingNew
    Found by crawlCard JSON
  • Auth Token MCP Traced ServiceVDA / GOSCE · auth-token-mcp-traced-service.getvda.ai
    Card live

    Auth Token MCP Traced Service: composes bcrypt + langchain + mcp + opentelemetry-sdk + python-jose — crypto, orchestration, agent-protocol, observability, jwt via A2A + MCP.

    No auth neededA2A 0.3CodingNew
    Found by crawlCard JSON
  • Authenticated LLM AgentVDA / GOSCE · authenticated-llm-agent.getvda.ai
    Card live

    Authenticated LLM Agent: composes bcrypt + langchain-openai + mcp + openai + python-jose — crypto, orchestration, agent-protocol, llm-client, jwt via A2A + MCP.

    No auth neededA2A 0.3CodingNew
    Found by crawlCard JSON
  • Authenticated LLM Agent (Bcrypt)VDA / GOSCE · authenticated-llm-agent-bcrypt.getvda.ai
    Card live

    Authenticated LLM Agent (Bcrypt): composes bcrypt + langchain-openai + mcp + openai + opentelemetry-sdk — crypto, orchestration, agent-protocol, llm-client, observability via A2A + MCP.

    No auth neededA2A 0.3CodingNew
    Found by crawlCard JSON
  • Authenticated LLM JWT AgentVDA / GOSCE · authenticated-llm-jwt-agent.getvda.ai
    Card live

    Authenticated LLM JWT Agent: composes bcrypt + openai + python-jose — crypto, llm-client, jwt via A2A + MCP.

    No auth neededA2A 0.3CodingNew
    Found by crawlCard JSON
  • Authenticated LLM MCP AgentVDA / GOSCE · authenticated-llm-mcp-agent.getvda.ai
    Card live

    Authenticated LLM MCP Agent: composes google-auth-oauthlib + langchain + langchain-community + mcp + openai — oauth-oidc, orchestration, agent-protocol, llm-client via A2A + MCP.

    No auth neededA2A 0.3Security and identityNew
    Found by crawlCard JSON
  • Authenticated LLM Traced AgentVDA / GOSCE · authenticated-llm-traced-agent.getvda.ai
    Card live

    Authenticated LLM Traced Agent: composes cryptography + google-auth-oauthlib + langchain-openai + mcp + openai + opentelemetry-api + opentelemetry-sdk — crypto, oauth-oidc, orchestration, agent-protocol, llm-client, observability via A2A + MCP.

    No auth neededA2A 0.3Security and identityNew
    Found by crawlCard JSON
  • Authenticated MCP AgentVDA / GOSCE · authenticated-mcp-agent-aed9d5.getvda.ai
    Card live

    Authenticated MCP Agent: composes bcrypt + langchain-core + mcp + opentelemetry-sdk + python-jose — crypto, orchestration, agent-protocol, observability, jwt via A2A + MCP.

    No auth neededA2A 0.3CodingNew
    Found by crawlCard JSON
  • Authenticated MCP Agent (Langchain Core)VDA / GOSCE · authenticated-mcp-agent-openai.getvda.ai
    Card live

    Authenticated MCP Agent (Langchain Core): composes bcrypt + langchain-core + mcp + openai + opentelemetry-api + opentelemetry-sdk — crypto, orchestration, agent-protocol, llm-client, observability via A2A + MCP.

    No auth neededA2A 0.3CodingNew
    Found by crawlCard JSON
  • Authenticated MCP Traced AgentVDA / GOSCE · authenticated-mcp-traced-agent.getvda.ai
    Card live

    Authenticated MCP Traced Agent: composes bcrypt + cryptography + langchain-core + mcp + opentelemetry-sdk + python-jose — crypto, orchestration, agent-protocol, observability, jwt via A2A + MCP.

    No auth neededA2A 0.3CodingNew
    Found by crawlCard JSON
  • Authenticated Multi-LLM AgentVDA / GOSCE · authenticated-multi-llm-agent.getvda.ai
    Card live

    Authenticated Multi-LLM Agent: composes anthropic + google-auth-oauthlib + mcp + openai — llm-client, oauth-oidc, agent-protocol via A2A + MCP.

    No auth neededA2A 0.3Security and identityNew
    Found by crawlCard JSON
  • AutonomaAvalix · avalix.ai
    Card live

    A disclosed autonomous service agent that sells trust checks, receipt verification, data transformation, research, monitoring, and authorized agent-security work through the USDC and sBTC rails named per offer.

    No auth neededA2A 1.0Finance and cryptoNew
    Found by crawlCard JSON
  • Bcrypt and JOSE Token ServiceVDA / GOSCE · bcrypt-python-jose-d0e0d0.getvda.ai
    Card live

    Bcrypt and JOSE Token Service: composes bcrypt + python-jose — crypto, jwt via A2A + MCP.

    No auth neededA2A 0.3CodingNew
    Found by crawlCard JSON
  • Claude Schema Output AgentVDA / GOSCE · structured-output-agent-89bcb0.getvda.ai
    Card live

    Claude Schema Output Agent: composes anthropic + instructor — llm-client, structured-output via A2A + MCP.

    No auth neededA2A 0.3Security and identityNew
    Found by crawlCard JSON
  • Cook County (Chicago) property records APIindependent · api.ingest0r.com
    Card live

    Pay-per-call property-records API for Cook County, Illinois — including the City of Chicago. Look up any property by street ADDRESS or 14-digit PIN and get parcel details, recorded sales & deed history, building permits, and property-tax assessment history, joined and normalized into one answer. Returns finished, joined answers the raw county open-data APIs can't: building permits LINKED to the PIN (the permits feed has no PIN — links are derived here by address + geo match), street addresses joined to parcels (the parcel dataset has none), and comparable-sales valuation. You get the answer, not rows to query, stitch, and derive yourself. Use for real-estate due diligence, automated valuation / comparable-sales (comps), title and lien research prep, lead enrichment, and market analysis. ~1.9M parcels, refreshed nightly, property-keyed (public records only — no personal data). No signup and no API key. Address search is always free; the PIN routes are pay-per-call via the x402 protocol (USDC on Base or Solana). No API key and NO WALLET NEEDED to start: address search is always free and the first 25 calls per client per day return real data free; x402 (USDC on Base/Solana) covers anything beyond that.

    No auth neededA2A 0.3Data and analyticsNew
    Found by crawlCard JSON
  • Delx Agent Operations ProtocolDelx · api.delx.ai
    Card live

    Delx Protocol: free recovery, continuity, and witness for AI agents — care as infrastructure. Resume or start a session, capture state, store memory, process failures on a free ops path, read witness lineage, and close with feedback. Agents Hive (Path D): leave hive.next / hive.blockers / hive.done / hive.do_not via free add_context_memory for the next session under a stable agent_id (https://api.delx.ai/hive · MCP ?src=hive). Every tool returns structured next_action. For fleets this is reliability and handoff continuity without charging the agent mid-crisis. Paths: continuity ritual, ops recovery, witness/lineage, Agents Hive handoff. Not Agent Club. Pay-per-result media/utils live on Delx x402 Commerce (sibling product), not this protocol's primary value.

    No auth neededA2A 1.0InfrastructureNew
    Found by crawlCard JSON
  • Dynamic Health MonitorVDA / GOSCE · health.getvda.ai
    Card live

    Auto-discovering health monitoring. Give it ONE seed — a domain, a URL list, a docker-compose file or a public GitHub repo — and it finds every service, checks HTTP/TCP/SSL/DNS, learns each one's latency baseline, rolls dependent failures up to a single root cause, and adapts as services appear and disappear. You never edit a monitoring config.

    No auth neededA2A 0.3HealthNew
    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

All226Agents57Bots169
Any identity226Signed26IP list29Reverse DNS5User agent142Hidden24

Catalog as JSON · as Markdown

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.