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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.
- 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.
No auth neededA2A 0.3CodingNewFound by crawlCard JSON - 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 0.3CodingNewFound by crawlCard JSON - 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 0.3CodingNewFound by crawlCard JSON - 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 0.3CodingNewFound by crawlCard JSON - 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 0.3CodingNewFound by crawlCard JSON - 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 identityNewFound by crawlCard JSON - 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 identityNewFound by crawlCard JSON - 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 0.3CodingNewFound by crawlCard JSON 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 0.3CodingNewFound by crawlCard JSON- 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 0.3CodingNewFound by crawlCard JSON 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.
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No auth neededA2A 1.0Search and researchNewFound by crawlCard JSON- 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.
No auth neededA2A 0.3CodingNewFound by crawlCard JSON - Card live
Encrypted LangChain Token Agent: composes cryptography + langchain-core + mcp + opentelemetry-api + python-jose — crypto, orchestration, agent-protocol, observability, jwt via A2A + MCP.
No auth neededA2A 0.3CodingNewFound by crawlCard JSON - 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.
No auth neededA2A 0.3Security and identityNewFound by crawlCard JSON - 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.
No auth neededA2A 0.3Security and identityNewFound by crawlCard JSON - 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.
No auth neededA2A 0.3Security and identityNewFound by crawlCard JSON LLM Observability & Orchestration Agent: composes langchain-core + langsmith + openai — orchestration, observability, llm-client via A2A + MCP.
No auth neededA2A 0.3Security and identityNewFound by crawlCard JSONLLM Observability & Orchestration Agent (Langchain Community): composes langchain + langchain-community + langchain-core + langsmith + openai — orchestration, observability, llm-client via A2A + MCP.
No auth neededA2A 0.3Security and identityNewFound by crawlCard JSONLLM Observability & Orchestration Agent (Langchain): composes langchain + langchain-core + langsmith + openai — orchestration, observability, llm-client via A2A + MCP.
No auth neededA2A 0.3Security and identityNewFound by crawlCard JSON- Card live
LLM Orchestration Agent: composes langchain-mcp-adapters + langchain-openai + mcp + openai — orchestration, agent-protocol, llm-client via A2A + MCP.
No auth neededA2A 0.3Security and identityNewFound by crawlCard JSON
Crawlers, bots and libraries we detect
The catalog: 226 clients named by user agent, IP list or signature
29 of 226 clients
Assistants fetching for a user 8
Fetched because a person asked an assistant.
- ChatGPT connectorsAgentIdentity: IP list
- ChatGPT-UserAgentIdentity: IP list
- Claude CodeAgentIdentity: IP list
- Claude-UserAgentIdentity: IP list
- Google-GeminiNotebookAgentIdentity: IP list
- MistralAI-UserAgentIdentity: IP list
- Perplexity-UserAgentIdentity: IP list
- Google user-triggered fetchersBotIdentity: IP list
Crawlers 21
Crawl the web for training, search or data.
- AdsBot-GoogleBotIdentity: IP list
- AhrefsBotBotIdentity: IP list
- ApplebotBotIdentity: IP list
- BingbotBotIdentity: IP list
- CCBotBotIdentity: IP list
- ChecklyBotIdentity: IP list
- Claude-SearchBotBotIdentity: IP list
- ClaudeBotBotIdentity: IP list
- Datadog SyntheticsBotIdentity: IP list
- DuckDuckBotBotIdentity: IP list
- GooglebotBotIdentity: IP list
- GoogleOtherBotIdentity: IP list
- GPTBotBotIdentity: IP list
- LinkupBotBotIdentity: IP list
- MistralAI-IndexBotIdentity: IP list
- OAI-AdsBotBotIdentity: IP list
- OAI-SearchBotBotIdentity: IP list
- PerplexityBotBotIdentity: IP list
- PingdomBotIdentity: IP list
- ShapBotBotIdentity: IP list
- UptimeRobotBotIdentity: IP list
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.