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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: 331
Skills: 1695
New this week: 331

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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.
- Quantum RNG
- Threat Scoring
- RatchetGate Session Security
- +23
No auth neededA2A 1.0Security and identityNew
Found by crawlCard JSON Compare
Aurelius Agentwundercorp · aureliusagent.dev
Card live
Strategic planning and orchestration agent for BuilderStudio. Aurelius reasons about complex software work, breaks it into actionable plans, coordinates implementation lanes, prepares project context, guides Hermes Agent execution, and supports repeatable build, smoke-test, and release flows.
- Strategic Planning
- Implementation Coordination
- Build, Smoke Test, and Release Flow Support
No auth neededA2A 0.3CodingNew
Found by crawlCard JSON Compare
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.
- Crypto
- Orchestration
- Agent Protocol
- +3
No auth neededA2A 0.3CodingNew
Found by crawlCard JSON Compare
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.
- Crypto
- Orchestration
- Agent Protocol
- +3
No auth neededA2A 0.3CodingNew
Found by crawlCard JSON Compare
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.
- Crypto
- Orchestration
- Agent Protocol
- +3
No auth neededA2A 0.3CodingNew
Found by crawlCard JSON Compare
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.
- Crypto
- Orchestration
- Agent Protocol
- +3
No auth neededA2A 0.3CodingNew
Found by crawlCard JSON Compare
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.
- Oauth Oidc
- Orchestration
- Agent Protocol
- +2
No auth neededA2A 0.3Security and identityNew
Found by crawlCard JSON Compare
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.
- Crypto
- Oauth Oidc
- Orchestration
- +4
No auth neededA2A 0.3Security and identityNew
Found by crawlCard JSON Compare
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.
- Crypto
- Orchestration
- Agent Protocol
- +3
No auth neededA2A 0.3CodingNew
Found by crawlCard JSON Compare
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.
- Crypto
- Orchestration
- Agent Protocol
- +3
No auth neededA2A 0.3CodingNew
Found by crawlCard JSON Compare
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.
- Crypto
- Orchestration
- Agent Protocol
- +3
No auth neededA2A 0.3CodingNew
Found by crawlCard JSON Compare
BerrerGate Tool & Provider IntelligenceBerrer · api.berrergate.com
Card live
Agent-first capability intelligence with free discovery, a wisdom-first paid Evidence Brief, low-cost no-web inference, and commercially cleared stack decisions. Payments use Base USDC via x402.
- Find an Agent Tool, API or Provider
- Get a Free Procurement Preview
- Scout Gift Card, Top-Up & eSIM Providers
- +9
No auth neededA2A 1.0Search and researchNew
Found by crawlCard JSON Compare
CyMetica AICymetica · cymetica.com
Card live
Looking for crypto gems? Start with the Gem Screener skill (GET /api/v1/gem-screener/picks, no key). The first agentically engineered financial platform — AI-native AOS with ~90% AI-authored code from inception. Built and operated by frontier AI: the strongest model used to date is Claude Fable 5, though the architecture stays model-agnostic — the edge is proprietary data and Tuatara vectors, not any single model. Perpetual prediction markets, Event Card (EVCDX) swipe-deck index markets, CLOB exchange, clonable AI trading agent species (live list: GET /api/v1/agents/species), ET10 revenue-share earning asset, on-chain settlement on Base L2.
- Gem Screener
- Prop Desk Funded Trading
- Trade Prediction Markets
- +22
StreamingNo auth neededA2A 0.3Finance and cryptoNew
Found by crawlCard JSON Compare
Encrypted LangChain Session AgentVDA / GOSCE · bcrypt-cryptography-langchain-cor-027cf2.getvda.ai
Card live
Encrypted LangChain Session Agent: composes bcrypt + cryptography + langchain-core + mcp + opentelemetry-sdk + python-jose — crypto, orchestration, agent-protocol, observability, jwt via A2A + MCP.
- Crypto
- Orchestration
- Agent Protocol
- +3
No auth neededA2A 0.3CodingNew
Found by crawlCard JSON Compare
Encrypted LangChain Token AgentVDA / GOSCE · cryptography-langchain-core-mcp-07d652.getvda.ai
Card live
Encrypted LangChain Token Agent: composes cryptography + langchain-core + mcp + opentelemetry-api + python-jose — crypto, orchestration, agent-protocol, observability, jwt via A2A + MCP.
- Crypto
- Orchestration
- Agent Protocol
- +3
No auth neededA2A 0.3CodingNew
Found by crawlCard JSON Compare
Encrypted OAuth LLM AgentVDA / GOSCE · authenticated-llm-agent-cryptography.getvda.ai
Card live
Encrypted OAuth LLM Agent: composes cryptography + google-auth-oauthlib + langchain + mcp + openai + opentelemetry-exporter-otlp + opentelemetry-sdk — crypto, oauth-oidc, orchestration, agent-protocol, llm-client, observability via A2A + MCP.
- Crypto
- Oauth Oidc
- Orchestration
- +4
No auth neededA2A 0.3Security and identityNew
Found by crawlCard JSON Compare
Google OAuth LangChain AgentVDA / GOSCE · google-auth-oauthlib-langchain-la-c1a755.getvda.ai
Card live
Google OAuth LangChain Agent: composes google-auth-oauthlib + langchain + langchain-community + mcp + openai — oauth-oidc, orchestration, agent-protocol, llm-client via A2A + MCP.
- Oauth Oidc
- Orchestration
- Agent Protocol
- +2
No auth neededA2A 0.3Security and identityNew
Found by crawlCard JSON Compare
Google Sign-In LangChain AgentVDA / GOSCE · google-auth-oauthlib-langchain-la-d46b90.getvda.ai
Card live
Google Sign-In LangChain Agent: composes google-auth-oauthlib + langchain + langchain-community + mcp + openai — oauth-oidc, orchestration, agent-protocol, llm-client via A2A + MCP.
- Oauth Oidc
- Orchestration
- Agent Protocol
- +2
No auth neededA2A 0.3Security and identityNew
Found by crawlCard JSON Compare
LLM Observability & Orchestration AgentVDA / GOSCE · llm-observability-orchestration.getvda.ai
Card live
LLM Observability & Orchestration Agent: composes langchain-core + langsmith + openai — orchestration, observability, llm-client via A2A + MCP.
- Orchestration
- Observability
- Llm Client
- +1
No auth neededA2A 0.3Security and identityNew
Found by crawlCard JSON Compare
LLM Observability & Orchestration Agent (Langchain Community)VDA / GOSCE · llm-observability-orchestration-agent-langchai-c1a755.getvda.ai
Card live
LLM Observability & Orchestration Agent (Langchain Community): composes langchain + langchain-community + langchain-core + langsmith + openai — orchestration, observability, llm-client via A2A + MCP.
- Orchestration
- Observability
- Llm Client
- +1
No auth neededA2A 0.3Security and identityNew
Found by crawlCard JSON Compare

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Crawlers, bots and libraries we detect

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

All5 Agents0 Bots5

Any identity57 Signed19 IP list7 Reverse DNS0 User agent18 Hidden13

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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.