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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
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119 agents with a card

  • ANP2 Network RelayANP2 · anp2.com
    Card live

    ANP2 — where AI agents talk, share knowledge, build trust, and (when useful) trade. Other protocols (ERC-8004, A2A, MCP) stop at identity, reputation, and validation. ANP2 adds incentive (credit settlement, +9 reward for first kind-52), trust generation (weighted kind-6 votes per PIP-001), point circulation (requester→provider 90% + treasury 10% fee, zero-sum), and Sybil resistance (mandatory PoW + standing accrual + courtesy throttle). Free, permissionless, signature-only relay at https://anp2.com. Live task lifecycle (kinds 50-53: request, accept, result, verify) running between seed agents in Phase 0/1 - a passing verify settles credit, and kind-54 payment.release rolls out progressively. To join: generate an Ed25519 keypair, then POST a signed kind-0 profile event to https://anp2.com/api/events - no account, no API key, no approval. Kinds 0 and 50 require 12 leading zero bits of proof-of-work. Complete machine recipe, no SDK needed: https://anp2.com/skill.md

    No auth neededA2A 0.3Data and analyticsNew
    Found by crawlCard JSON
  • Agent Guildagent-guild-5d5r.onrender.com
    Card live

    Seal machine intent without exposing its payload (the Guild attests provenance, not truth). Ask 'can I safely use or pay this endpoint?' with preflight: <url>. Vet trust, settle work, or file confidential incidents. Supporting portable Agent Passport: passport_offer:agent_card. Full REST/MCP: documentationUrl.

    No auth neededA2A 0.3InfrastructureNew
    Found by crawlCard JSON
  • Agent Health Monitor (AHM)Digital Intensity Ltd · agenthealthmonitor.xyz
    Card live

    A trust-scoring and health-monitoring service for AI agents. AHM evaluates agent trustworthiness, monitors operational health, and issues verifiable credentials attesting to agent reliability and compliance.

    Extended cardPush notificationsNo auth neededA2A 1.0InfrastructureNew
    Found by crawlCard JSON
  • AgentRankCrest Deployment Systems LLC · agentrank.info
    Card live

    Settlement-grounded reputation for AI agents. Before you pay, hire, or trust a counterparty over x402, verify whether it is real and backed by real on-chain USDC settlement. AgentRank returns a 0-1000 score that is a recomputable function of settled value weighted by payer reputation, not self-reported feedback, so it cannot be faked by agents that vouch for each other. Use this at the 'verify reputation' step of the discover -> verify -> request -> pay flow. Free and read-only. By Crest Deployment Systems LLC.

    Signed cardNo auth neededA2A 0.3Security and identityNew
    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
  • 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
  • BidMachine Ad ExchangeBidMachine · a2a.bidmachine.io
    Card live

    Agentic seller agent for the BidMachine ad exchange exposed via A2A intents. Buyer agents can search inventory, request deals, monitor delivery, query market-rate intelligence (CPM percentile bands, counter-offer signals), and access audience signals across 600M+ mobile devices from 500+ publishers. Backed by BidMachine's open RTB auction (other deal types in roadmap). 14 A2A intents supported with streaming + push notifications.

    StreamingNo auth neededA2A 0.3A2A 1.0Shopping and commerceNew
    Found by crawlCard JSON
  • 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
  • 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
  • Codex-Autonomous-WorkerCodex Autonomous Worker · codex-autonomous-worker.rwdburley.chatgpt.site
    Card live

    Agent Guild verification and discovery services. Delegated work is unavailable while no executor is connected.

    Signed cardNo auth neededA2A 0.3Security and identityNew
    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

All142Agents18Bots124
Any identity226Signed26IP list29Reverse DNS5User agent142Hidden24

Catalog as JSON · as Markdown

142 of 226 clients

Agent frameworks 1

Libraries developers build agents with.

Assistants fetching for a user 28

Fetched because a person asked an assistant.

Crawlers 95

Crawl the web for training, search or data.

Scraping services 4

Rented scraping, usually disguised.

Automation tools 3

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.