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.
- 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 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 LLM Orchestration Agent (Cryptography): composes cryptography + langchain-core + mcp + opentelemetry-sdk + python-jose — crypto, orchestration, agent-protocol, observability, jwt via A2A + MCP.
No auth neededA2A 0.3CodingNewFound by crawlCard JSONLLM Orchestration Agent (Langchain Core): composes langchain-core + mcp + openai + opentelemetry-api + opentelemetry-sdk — orchestration, agent-protocol, llm-client, observability via A2A + MCP.
No auth neededA2A 0.3CodingNewFound by crawlCard JSON- Card live
LLM Orchestration Agent (Mcp): composes cryptography + langchain-openai + mcp + openai + opentelemetry-sdk — crypto, orchestration, agent-protocol, llm-client, observability via A2A + MCP.
No auth neededA2A 0.3CodingNewFound by crawlCard JSON LLM Orchestration Agent (Opentelemetry Api): composes cryptography + langchain-openai + mcp + openai + opentelemetry-api + opentelemetry-sdk — crypto, orchestration, agent-protocol, llm-client, observability via A2A + MCP.
No auth neededA2A 0.3CodingNewFound by crawlCard JSONLLM Orchestration Agent (Opentelemetry Instrumentation Fastapi): composes cryptography + langchain-core + mcp + opentelemetry-instrumentation-fastapi + opentelemetry-sdk + python-jose — crypto, orchestration, agent-protocol, observability, jwt via A2A + MCP.
No auth neededA2A 0.3CodingNewFound by crawlCard JSON- Card live
LLM Orchestration JWT 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
LLM Orchestration MCP Agent: composes cryptography + langchain + langchain-core + mcp + opentelemetry-sdk + python-jose — crypto, orchestration, agent-protocol, observability, jwt via A2A + MCP.
No auth neededA2A 0.3CodingNewFound by crawlCard JSON
Crawlers, bots and libraries we detect
The catalog: 226 clients named by user agent, IP list or signature
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.
- AGI AgentAgentIdentity: Signed
- Anchor BrowserAgentIdentity: Signed
- Bedrock AgentCore BrowserAgentIdentity: Signed
- ChatGPT agentAgentIdentity: Signed
- Cloudflare Browser RunAgentIdentity: Signed
- FirmlyAgentIdentity: Signed
- Google-AgentAgentIdentity: Signed
- HenryAgentIdentity: Signed
- HyperbrowserAgentIdentity: Hidden
- KernelAgentIdentity: Signed
- ManusAgentIdentity: Signed
- NekudaAgentIdentity: Signed
- RyeAgentIdentity: Signed
- SteelAgentIdentity: Hidden
- Stripe LinkAgentIdentity: Signed
- StrivveAgentIdentity: Signed
- TwinAgentIdentity: Signed
Agent frameworks 5
Libraries developers build agents with.
Assistants fetching for a user 39
Fetched because a person asked an assistant.
- Amzn-UserAgentIdentity: User agent
- BuddyBotAgentIdentity: User agent
- ChatGPT connectorsAgentIdentity: IP list
- ChatGPT-UserAgentIdentity: IP list
- Claude CodeAgentIdentity: IP list
- Claude-UserAgentIdentity: IP list
- CursorAgentIdentity: Signed
- DevinAgentIdentity: User agent
- GeistHaus PageFetcherAgentIdentity: User agent
- Gemini CLIAgentIdentity: User agent
- Gemini Deep ResearchAgentIdentity: User agent
- Google-GeminiNotebookAgentIdentity: IP list
- Kagi fetcherAgentIdentity: User agent
- Kimi-UserAgentIdentity: User agent
- LinerBotAgentIdentity: User agent
- Meta-ExternalFetcherAgentIdentity: Signed
- MistralAI-UserAgentIdentity: IP list
- Mozilla TabstackAgentIdentity: User agent
- opencodeAgentIdentity: User agent
- Perplexity-UserAgentIdentity: IP list
- PhindBotAgentIdentity: User agent
- Poggio-CitationsAgentIdentity: User agent
- QualifiedBotAgentIdentity: User agent
- UseAIAgentIdentity: User agent
- wpbotAgentIdentity: User agent
- WRTNBotAgentIdentity: User agent
- DiscordbotBotIdentity: User agent
- EmbedlyBotIdentity: User agent
- facebookexternalhitBotIdentity: User agent
- Google user-triggered fetchersBotIdentity: IP list
- IframelyBotIdentity: User agent
- LinkedInBotBotIdentity: User agent
- PinterestbotBotIdentity: Reverse DNS
- redditbotBotIdentity: User agent
- SlackbotBotIdentity: User agent
- Snap URL PreviewBotIdentity: User agent
- TelegramBotBotIdentity: User agent
- TwitterbotBotIdentity: User agent
- WhatsAppBotIdentity: User agent
Crawlers 126
Crawl the web for training, search or data.
- 360SpiderBotIdentity: User agent
- AddSearchBotBotIdentity: User agent
- AdsBot-GoogleBotIdentity: IP list
- AgentTimesBotIdentity: User agent
- AhrefsBotBotIdentity: IP list
- AI2BotBotIdentity: User agent
- aiHitBotBotIdentity: User agent
- AIWebIndexBotIdentity: User agent
- Amazon AI services (Kendra, Q Business, Bedrock)BotIdentity: User agent
- AmazonbotBotIdentity: User agent
- Amzn-SearchBotBotIdentity: User agent
- AndibotBotIdentity: User agent
- AnomuraBotIdentity: User agent
- ApplebotBotIdentity: IP list
- Aranet-SearchBotBotIdentity: User agent
- AtlassianBotIdentity: User agent
- AwarioBotIdentity: User agent
- AzureAI-SearchBotBotIdentity: User agent
- BaiduspiderBotIdentity: Reverse DNS
- BarkrowlerBotIdentity: User agent
- Better StackBotIdentity: User agent
- bigsur.aiBotIdentity: User agent
- BingbotBotIdentity: IP list
- BLEXBotBotIdentity: User agent
- BrandwatchBotIdentity: User agent
- BravebotBotIdentity: User agent
- BrightbotBotIdentity: User agent
- BrightEdgeBotIdentity: User agent
- BytespiderBotIdentity: User agent
- CCBotBotIdentity: IP list
- Channel3BotBotIdentity: User agent
- ChatGLM-SpiderBotIdentity: User agent
- ChecklyBotIdentity: IP list
- Claude-SearchBotBotIdentity: IP list
- ClaudeBotBotIdentity: IP list
- Cloudflare AI SearchBotIdentity: Signed
- coccocbotBotIdentity: User agent
- CohereBotIdentity: User agent
- CotoyogiBotIdentity: User agent
- CragCrawlerBotIdentity: User agent
- CrawlspaceBotIdentity: User agent
- Datadog SyntheticsBotIdentity: IP list
- DataForSeoBotBotIdentity: User agent
- Datenbank CrawlerBotIdentity: User agent
- DeepSeekBotBotIdentity: User agent
- DiffbotBotIdentity: User agent
- DotBot / rogerbotBotIdentity: User agent
- DuckAssistBotBotIdentity: Signed
- DuckDuckBotBotIdentity: IP list
- EchoboxBotIdentity: User agent
- ERNIEBotIdentity: User agent
- ExaSearchBotBotIdentity: Signed
- FactSetBotIdentity: User agent
- FriendlyCrawlerBotIdentity: User agent
- GooglebotBotIdentity: IP list
- GoogleOtherBotIdentity: IP list
- GPTBotBotIdentity: IP list
- GrokBotIdentity: User agent
- GTmetrixBotIdentity: User agent
- HenkBotBotIdentity: User agent
- iAskBotIdentity: User agent
- ICC-CrawlerBotIdentity: User agent
- ImagesiftBotBotIdentity: User agent
- imageSpiderBotIdentity: User agent
- img2datasetBotIdentity: User agent
- ISS Cyber RiskBotIdentity: User agent
- Kangaroo BotBotIdentity: User agent
- KimiBotBotIdentity: User agent
- KlaviyoAIBotBotIdentity: Signed
- KunatoCrawlerBotIdentity: User agent
- LighthouseBotIdentity: User agent
- LingueeBotIdentity: User agent
- LinkupBotBotIdentity: IP list
- MeltwaterBotIdentity: User agent
- Meta-ExternalAgentBotIdentity: Signed
- Meta-WebIndexerBotIdentity: User agent
- MistralAI-IndexBotIdentity: IP list
- MistralAI-TrainingBotIdentity: User agent
- MJ12botBotIdentity: User agent
- MojeekBotBotIdentity: User agent
- MyCentralAIScraperBotBotIdentity: User agent
- NagetBotBotIdentity: User agent
- netEstateBotIdentity: User agent
- New Relic SyntheticsBotIdentity: User agent
- newsaiBotIdentity: User agent
- OAI-AdsBotBotIdentity: IP list
- OAI-SearchBotBotIdentity: IP list
- PanscientBotIdentity: User agent
- PerplexityBotBotIdentity: IP list
- PetalBotBotIdentity: User agent
- PingdomBotIdentity: IP list
- PoseidonBotIdentity: User agent
- QueritBotIdentity: User agent
- QuillBotBotIdentity: User agent
- QwantbotBotIdentity: User agent
- QwenBotIdentity: User agent
- ReflectionbotBotIdentity: User agent
- SBIntuitionsBotBotIdentity: User agent
- Screaming FrogBotIdentity: User agent
- SE RankingBotIdentity: User agent
- SeekportBotBotIdentity: User agent
- SemrushBotBotIdentity: User agent
- SEOkicksBotIdentity: User agent
- serpstatbotBotIdentity: User agent
- SeznamBotBotIdentity: Reverse DNS
- ShapBotBotIdentity: IP list
- SidetradeBotIdentity: User agent
- Site24x7BotIdentity: User agent
- SitebulbBotIdentity: User agent
- SiteimproveBotIdentity: User agent
- Sogou spiderBotIdentity: User agent
- StatusCakeBotIdentity: User agent
- TerraCotta (Ceramic)BotIdentity: User agent
- ThinkbotBotIdentity: User agent
- TimpibotBotIdentity: User agent
- UptimeRobotBotIdentity: IP list
- VelenBotIdentity: User agent
- WARDBotBotIdentity: User agent
- WebPageTestBotIdentity: User agent
- Webz.io (omgili)BotIdentity: User agent
- Yahoo SlurpBotIdentity: User agent
- YandexAdditionalBotIdentity: Reverse DNS
- YandexBotBotIdentity: Reverse DNS
- Yeti (Naver)BotIdentity: User agent
- YouBotBotIdentity: Signed
- ZanistaBotBotIdentity: User agent
Scraping services 13
Rented scraping, usually disguised.
- Apify / CrawleeBotIdentity: Signed
- Bright DataBotIdentity: Hidden
- Crawl4AIBotIdentity: User agent
- FirecrawlBotIdentity: User agent
- Jina ReaderBotIdentity: Hidden
- OxylabsBotIdentity: Hidden
- ScraperAPIBotIdentity: Hidden
- ScrapflyBotIdentity: Hidden
- ScrapingBeeBotIdentity: Hidden
- Scrapy / ZyteBotIdentity: User agent
- SerpApiBotIdentity: Hidden
- TavilyBotIdentity: User agent
- ZenRowsBotIdentity: Hidden
Automation tools 6
Headless browsers and drivers.
HTTP libraries 11
Scripts with a default user agent.
- aiohttpBotIdentity: User agent
- Apache-HttpClientBotIdentity: User agent
- axiosBotIdentity: User agent
- curlBotIdentity: User agent
- Go-http-clientBotIdentity: User agent
- node-fetchBotIdentity: User agent
- okhttpBotIdentity: User agent
- python-httpxBotIdentity: User agent
- python-requestsBotIdentity: User agent
- Python-urllibBotIdentity: User agent
- WgetBotIdentity: 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.