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.
- With a card
- 331
- Live now
- 331
- Skills
- 1695
- New this week
- 331
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No auth neededA2A 1.0Search and researchNewFound by crawlCard JSONPriorflow Intelligent Agent/Service Selector — an agent-native service that discovers, ranks, and recommends the best MCP servers and A2A agents for a task under real constraints (cost, latency, reliability, specialization, autonomy, maturity). Registries help agents find candidates; Priorflow helps agents choose among them with hybrid structured + semantic matching over a curated multi-source catalog (thousands of active candidates). Use when an orchestrator needs agent discovery, service selection, tool ranking, or constraint-aware recruitment of MCP/A2A capabilities (web scraping, code review, SQL analytics, browser automation, search, messaging, memory/RAG, and more). Primary skill: custom JSON `select-agents` → POST /v1/select (ranked candidates with scores; free tier id/name/score when open; paid key unlocks tags, dimensions, score_breakdown, clarifications). Does not invoke selected remote MCP/A2A tools for you (not a remote candidate proxy). This host is NOT an MCP server (MCP adapter off). Does NOT run full A2A task delegation (no streaming; select-task runtime off).
No auth neededA2A 1.0Search and researchNewFound by crawlCard JSON
Crawlers, bots and libraries we detect
The catalog: 226 clients named by user agent, IP list or signature
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.
- Amzn-UserAgentIdentity: User agent
- BuddyBotAgentIdentity: User agent
- DevinAgentIdentity: User agent
- GeistHaus PageFetcherAgentIdentity: User agent
- Gemini CLIAgentIdentity: User agent
- Gemini Deep ResearchAgentIdentity: User agent
- Kagi fetcherAgentIdentity: User agent
- Kimi-UserAgentIdentity: User agent
- LinerBotAgentIdentity: User agent
- Mozilla TabstackAgentIdentity: User agent
- opencodeAgentIdentity: User agent
- 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
- IframelyBotIdentity: User agent
- LinkedInBotBotIdentity: User agent
- redditbotBotIdentity: User agent
- SlackbotBotIdentity: User agent
- Snap URL PreviewBotIdentity: User agent
- TelegramBotBotIdentity: User agent
- TwitterbotBotIdentity: User agent
- WhatsAppBotIdentity: User agent
Crawlers 95
Crawl the web for training, search or data.
- 360SpiderBotIdentity: User agent
- AddSearchBotBotIdentity: User agent
- AgentTimesBotIdentity: User agent
- 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
- Aranet-SearchBotBotIdentity: User agent
- AtlassianBotIdentity: User agent
- AwarioBotIdentity: User agent
- AzureAI-SearchBotBotIdentity: User agent
- BarkrowlerBotIdentity: User agent
- Better StackBotIdentity: User agent
- bigsur.aiBotIdentity: User agent
- BLEXBotBotIdentity: User agent
- BrandwatchBotIdentity: User agent
- BravebotBotIdentity: User agent
- BrightbotBotIdentity: User agent
- BrightEdgeBotIdentity: User agent
- BytespiderBotIdentity: User agent
- Channel3BotBotIdentity: User agent
- ChatGLM-SpiderBotIdentity: User agent
- coccocbotBotIdentity: User agent
- CohereBotIdentity: User agent
- CotoyogiBotIdentity: User agent
- CragCrawlerBotIdentity: User agent
- CrawlspaceBotIdentity: User agent
- DataForSeoBotBotIdentity: User agent
- Datenbank CrawlerBotIdentity: User agent
- DeepSeekBotBotIdentity: User agent
- DiffbotBotIdentity: User agent
- DotBot / rogerbotBotIdentity: User agent
- EchoboxBotIdentity: User agent
- ERNIEBotIdentity: User agent
- FactSetBotIdentity: User agent
- FriendlyCrawlerBotIdentity: User agent
- 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
- KunatoCrawlerBotIdentity: User agent
- LighthouseBotIdentity: User agent
- LingueeBotIdentity: User agent
- MeltwaterBotIdentity: User agent
- Meta-WebIndexerBotIdentity: User agent
- 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
- PanscientBotIdentity: User agent
- PetalBotBotIdentity: User agent
- 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
- 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
- VelenBotIdentity: User agent
- WARDBotBotIdentity: User agent
- WebPageTestBotIdentity: User agent
- Webz.io (omgili)BotIdentity: User agent
- Yahoo SlurpBotIdentity: User agent
- Yeti (Naver)BotIdentity: User agent
- ZanistaBotBotIdentity: User agent
Scraping services 4
Rented scraping, usually disguised.
Automation tools 3
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.