{"id":"2026-10-06","computed_at":"2026-10-06T23:13:09+00:00","stats":{"generated":{"sources":37,"listings":1058055,"endpoints":215864,"probed":215859,"alive":65010,"conformant":47045,"last_probe":"2026-10-06T23:12:29+00:00","first_probe":"2026-09-07T00:05:52+00:00","pct_alive":30.1,"pct_conformant":21.8,"probes_total":5161596},"by_kind":[{"kind":"a2a","total":13451,"ok":1194,"auth-required":359,"card-invalid":2017,"protocol-mismatch":2337,"http-error":6074,"timeout":266,"tls-fail":170,"connect-fail":65,"dns-fail":567,"blocked":13,"unprobeable":389},{"kind":"agent-facts","total":226,"ok":49,"auth-required":0,"card-invalid":1,"protocol-mismatch":0,"http-error":174,"timeout":0,"tls-fail":0,"connect-fail":0,"dns-fail":1,"blocked":1,"unprobeable":0},{"kind":"agents-txt","total":51345,"ok":667,"auth-required":0,"card-invalid":0,"protocol-mismatch":4623,"http-error":39376,"timeout":458,"tls-fail":448,"connect-fail":169,"dns-fail":1950,"blocked":3654,"unprobeable":0},{"kind":"ard","total":51352,"ok":1187,"auth-required":0,"card-invalid":4489,"protocol-mismatch":0,"http-error":42585,"timeout":479,"tls-fail":453,"connect-fail":174,"dns-fail":1972,"blocked":13,"unprobeable":0},{"kind":"llm-api","total":193,"ok":72,"auth-required":100,"card-invalid":0,"protocol-mismatch":4,"http-error":11,"timeout":0,"tls-fail":0,"connect-fail":0,"dns-fail":2,"blocked":4,"unprobeable":0},{"kind":"llms-txt","total":65693,"ok":24827,"auth-required":0,"card-invalid":2989,"protocol-mismatch":3764,"http-error":27058,"timeout":526,"tls-fail":548,"connect-fail":275,"dns-fail":2035,"blocked":3671,"unprobeable":0},{"kind":"mcp","total":70579,"ok":13855,"auth-required":16946,"card-invalid":0,"protocol-mismatch":27773,"http-error":9749,"timeout":433,"tls-fail":382,"connect-fail":142,"dns-fail":1191,"blocked":108,"unprobeable":0},{"kind":"openapi","total":1,"ok":1,"auth-required":0,"card-invalid":0,"protocol-mismatch":0,"http-error":0,"timeout":0,"tls-fail":0,"connect-fail":0,"dns-fail":0,"blocked":0,"unprobeable":0},{"kind":"robots","total":51344,"ok":25582,"auth-required":0,"card-invalid":0,"protocol-mismatch":0,"http-error":22746,"timeout":447,"tls-fail":447,"connect-fail":166,"dns-fail":1943,"blocked":13,"unprobeable":0},{"kind":"sigdir","total":51351,"ok":380,"auth-required":0,"card-invalid":4467,"protocol-mismatch":0,"http-error":39815,"timeout":458,"tls-fail":439,"connect-fail":175,"dns-fail":1944,"blocked":3673,"unprobeable":0},{"kind":"site","total":26,"ok":21,"auth-required":0,"card-invalid":0,"protocol-mismatch":0,"http-error":3,"timeout":0,"tls-fail":0,"connect-fail":0,"dns-fail":1,"blocked":1,"unprobeable":0},{"kind":"x402","total":80270,"ok":30736,"auth-required":560,"card-invalid":0,"protocol-mismatch":2469,"http-error":42651,"timeout":676,"tls-fail":477,"connect-fail":303,"dns-fail":2396,"blocked":2,"unprobeable":0}],"outcomes":["ok","auth-required","card-invalid","protocol-mismatch","http-error","timeout","tls-fail","connect-fail","dns-fail","blocked","unprobeable"],"meta":{"kinds":{"mcp":{"name":"Model Context Protocol server","abbr":"MCP","definer":"Anthropic / Linux Foundation Agentic AI Foundation","spec":"https://modelcontextprotocol.io/specification/latest","standard":"mcp-registry","probe":"Streamable HTTP initialize handshake, then tools/resources/prompts listings"},"a2a":{"name":"Agent2Agent protocol agent","abbr":"A2A","definer":"Google / Linux Foundation","spec":"https://a2a-protocol.org/latest/specification/","standard":"a2a-agent-card","probe":"agent card fetch and validation, one message/send"},"ard":{"name":"Agentic Resource Discovery catalog","abbr":"ARD","definer":"Google (ards-project)","spec":"https://github.com/ards-project/ard-spec","standard":"google-ard","probe":"/.well-known/ard.json (or ai-catalog.json) fetch and entry validation"},"x402":{"name":"x402 paid HTTP resource","abbr":"x402","definer":"Coinbase","spec":"https://www.x402.org/","standard":null,"probe":"GET expecting 402 with a PAYMENT-REQUIRED header"},"llm-api":{"name":"OpenAI-compatible inference API","abbr":"LLM API","definer":"de-facto (OpenAI API shape)","spec":"https://platform.openai.com/docs/api-reference/models/list","standard":null,"probe":"GET /v1/models without credentials"},"openapi":{"name":"OpenAPI description","abbr":"OpenAPI","definer":"OpenAPI Initiative (Linux Foundation)","spec":"https://spec.openapis.org/oas/latest.html","standard":null,"probe":"document fetch, version and operation count"},"llms-txt":{"name":"/llms.txt file","abbr":"llms.txt","definer":"Jeremy Howard (llmstxt.org)","spec":"https://llmstxt.org/","standard":"llms-txt","probe":"fetch and format check"},"agents-txt":{"name":"/.well-known/agents.txt capability declaration","abbr":"agents.txt","definer":"IETF Internet-Draft (Car)","spec":"https://datatracker.ietf.org/doc/draft-car-agents-txt-wellknown/","standard":"draft-car-agents-txt-wellknown","probe":"fetch and directive check"},"robots":{"name":"robots.txt","abbr":"robots.txt","definer":"IETF RFC 9309","spec":"https://www.rfc-editor.org/rfc/rfc9309","standard":null,"probe":"fetch; AI-bot rules and Content-Usage lines"},"sigdir":{"name":"HTTP message signatures directory","abbr":"sigdir","definer":"IETF Internet-Draft (Meunier)","spec":"https://datatracker.ietf.org/doc/draft-meunier-http-message-signatures-directory/","standard":"draft-meunier-http-message-signatures-directory","probe":"/.well-known/http-message-signatures-directory fetch and JWKS check"},"agent-facts":{"name":"NANDA AgentFacts record","abbr":"AgentFacts","definer":"MIT (NANDA)","spec":"https://github.com/aidecentralized/NANDA-Quilt-of-Registries-and-Verified-AgentFacts","standard":"nanda-agentfacts","probe":"/.well-known/agent-facts.json fetch and field check"},"site":{"name":"web site (no protocol endpoint)","abbr":"site","definer":null,"spec":null,"standard":null,"probe":"not probed"}},"outcomes":{"ok":{"group":"answered, conformant","meaning":"handshake completed and the protocol behaved as declared","counts_as":"alive, conformant","doc":"https://agentprobe.org/methodology#outcomes"},"auth-required":{"group":"answered, needs credentials","meaning":"reachable; the protocol step needs credentials we do not have","counts_as":"alive","doc":"https://agentprobe.org/methodology#outcomes"},"card-invalid":{"group":"reachable, wrong protocol or invalid card","meaning":"manifest fetched but fails required-field validation","counts_as":"not alive","doc":"https://agentprobe.org/methodology#outcomes"},"protocol-mismatch":{"group":"reachable, wrong protocol or invalid card","meaning":"reachable, but does not speak the declared protocol","counts_as":"not alive","doc":"https://agentprobe.org/methodology#outcomes"},"http-error":{"group":"no answer","meaning":"4xx/5xx on the primary fetch (other than auth)","counts_as":"not alive","doc":"https://agentprobe.org/methodology#outcomes"},"timeout":{"group":"no answer","meaning":"no complete response within the fetch budget","counts_as":"not alive","doc":"https://agentprobe.org/methodology#outcomes"},"tls-fail":{"group":"no answer","meaning":"TLS handshake failed","counts_as":"not alive","doc":"https://agentprobe.org/methodology#outcomes"},"connect-fail":{"group":"no answer","meaning":"TCP connection refused or reset","counts_as":"not alive","doc":"https://agentprobe.org/methodology#outcomes"},"dns-fail":{"group":"no answer","meaning":"hostname does not resolve","counts_as":"not alive","doc":"https://agentprobe.org/methodology#outcomes"},"blocked":{"group":"not probed","meaning":"resolves to a private, loopback, link-local or metadata address, or robots.txt disallows; we refuse to connect","counts_as":"excluded","doc":"https://agentprobe.org/methodology#outcomes"},"unprobeable":{"group":"not probed","meaning":"no remote endpoint exists for this listing","counts_as":"excluded","doc":"https://agentprobe.org/methodology#outcomes"}},"method":"https://agentprobe.org/methodology"},"computed_at":"2026-10-06T23:12:49+00:00"},"per_source":[{"id":"commoncrawl-llms-txt","name":"Common Crawl llms.txt corpus (CC-MAIN-2026-30)","listings":597970,"endpoints":14362,"probed":0,"alive":0,"conformant":0,"pct_alive":null},{"id":"agenstry","name":"Agenstry","listings":253507,"endpoints":50818,"probed":50813,"alive":18760,"conformant":12184,"pct_alive":36.9},{"id":"agent-tools-cloud","name":"agent-tools.cloud","listings":70985,"endpoints":58224,"probed":58224,"alive":17963,"conformant":15249,"pct_alive":30.9},{"id":"mcp-registry-official","name":"Official MCP Registry","listings":39901,"endpoints":25237,"probed":25237,"alive":19397,"conformant":12554,"pct_alive":76.9},{"id":"x402-bazaar","name":"x402 Bazaar (Coinbase CDP discovery)","listings":36469,"endpoints":17210,"probed":17210,"alive":12174,"conformant":12028,"pct_alive":70.7},{"id":"npm-keyword-mcp","name":"npm packages with keyword mcp / mcp-server","listings":32857,"endpoints":0,"probed":0,"alive":0,"conformant":0,"pct_alive":null},{"id":"huggingface-hub-mcp","name":"Hugging Face Hub (Spaces/Models tagged MCP or agent)","listings":11688,"endpoints":11239,"probed":11239,"alive":81,"conformant":0,"pct_alive":0.7},{"id":"agentverse-fetch-ai","name":"Agentverse (Fetch.ai Almanac)","listings":10940,"endpoints":0,"probed":0,"alive":0,"conformant":0,"pct_alive":null},{"id":"github-topic-mcp-server","name":"GitHub repositories tagged mcp-server","listings":1090,"endpoints":0,"probed":0,"alive":0,"conformant":0,"pct_alive":null},{"id":"a2a-registry-org","name":"A2A Registry (a2aregistry.org)","listings":583,"endpoints":525,"probed":525,"alive":313,"conformant":282,"pct_alive":59.6},{"id":"openrouter-models","name":"OpenRouter models API","listings":501,"endpoints":0,"probed":0,"alive":0,"conformant":0,"pct_alive":null},{"id":"nanda-index","name":"Project NANDA Index (MIT)","listings":328,"endpoints":223,"probed":112,"alive":8,"conformant":7,"pct_alive":7.1},{"id":"smithery","name":"Smithery Registry","listings":311,"endpoints":264,"probed":264,"alive":261,"conformant":0,"pct_alive":98.9},{"id":"docker-mcp-catalog","name":"Docker MCP Catalog","listings":270,"endpoints":30,"probed":30,"alive":22,"conformant":14,"pct_alive":73.3},{"id":"models-dev","name":"models.dev","listings":227,"endpoints":191,"probed":191,"alive":171,"conformant":72,"pct_alive":89.5},{"id":"virtuals-protocol","name":"Virtuals Protocol agents","listings":200,"endpoints":0,"probed":0,"alive":0,"conformant":0,"pct_alive":null},{"id":"cline-mcp-marketplace","name":"Cline MCP Marketplace","listings":199,"endpoints":0,"probed":0,"alive":0,"conformant":0,"pct_alive":null},{"id":"global-chat-directory","name":"Global Chat agent directory","listings":25,"endpoints":25,"probed":0,"alive":0,"conformant":0,"pct_alive":null},{"id":"agentprobe-self","name":"agentprobe.org (self)","listings":4,"endpoints":5,"probed":4,"alive":4,"conformant":4,"pct_alive":100.0},{"id":"agntcy-agent-directory","name":"AGNTCY Agent Directory Service (Outshift hosted)","listings":0,"endpoints":0,"probed":0,"alive":0,"conformant":0,"pct_alive":null},{"id":"aiagentsdirectory","name":"AI Agents Directory (aiagentsdirectory.com)","listings":0,"endpoints":0,"probed":0,"alive":0,"conformant":0,"pct_alive":null},{"id":"aiagentslist","name":"AI Agents List (aiagentslist.com)","listings":0,"endpoints":0,"probed":0,"alive":0,"conformant":0,"pct_alive":null},{"id":"cloudflare-web-bot-auth-registry","name":"Cloudflare signature-agent registry (Web Bot Auth) + Radar bots directory","listings":0,"endpoints":0,"probed":0,"alive":0,"conformant":0,"pct_alive":null},{"id":"erc-8004-agent0-subgraph","name":"Agent0 ERC-8004 subgraphs (The Graph)","listings":0,"endpoints":0,"probed":0,"alive":0,"conformant":0,"pct_alive":null},{"id":"erc-8004-identity-registry","name":"ERC-8004 Trustless Agents — Identity Registry (on-chain)","listings":0,"endpoints":0,"probed":0,"alive":0,"conformant":0,"pct_alive":null},{"id":"glama-mcp","name":"Glama MCP directory","listings":0,"endpoints":0,"probed":0,"alive":0,"conformant":0,"pct_alive":null},{"id":"mcp-so","name":"mcp.so","listings":0,"endpoints":0,"probed":0,"alive":0,"conformant":0,"pct_alive":null},{"id":"microsoft-entra-agent-registry","name":"Microsoft Entra Agent ID / Agent 365 registry","listings":0,"endpoints":0,"probed":0,"alive":0,"conformant":0,"pct_alive":null},{"id":"moltbook","name":"Moltbook (social network for AI agents)","listings":0,"endpoints":0,"probed":0,"alive":0,"conformant":0,"pct_alive":null},{"id":"pulsemcp","name":"PulseMCP","listings":0,"endpoints":0,"probed":0,"alive":0,"conformant":0,"pct_alive":null},{"id":"wellknown-a2a-agent-card","name":"A2A Agent Card well-known path","listings":0,"endpoints":0,"probed":0,"alive":0,"conformant":0,"pct_alive":null},{"id":"wellknown-agents-txt","name":"agents.txt / agents.json","listings":0,"endpoints":0,"probed":0,"alive":0,"conformant":0,"pct_alive":null},{"id":"wellknown-ard-catalog","name":"Agentic Resource Discovery (ARD) catalog well-known path","listings":0,"endpoints":0,"probed":0,"alive":0,"conformant":0,"pct_alive":null},{"id":"wellknown-http-message-signatures-directory","name":"Web Bot Auth key directory (signature-agent card)","listings":0,"endpoints":0,"probed":0,"alive":0,"conformant":0,"pct_alive":null},{"id":"wellknown-llms-txt","name":"llms.txt","listings":0,"endpoints":0,"probed":0,"alive":0,"conformant":0,"pct_alive":null},{"id":"wellknown-mcp-server-card","name":"MCP server card well-known path (SEP-2127 / SEP-1960 / IETF draft)","listings":0,"endpoints":0,"probed":0,"alive":0,"conformant":0,"pct_alive":null},{"id":"wellknown-nanda-agent-facts","name":"NANDA AgentFacts well-known path","listings":0,"endpoints":0,"probed":0,"alive":0,"conformant":0,"pct_alive":null}],"multiplicity":[{"n_sources":1,"endpoints":105207},{"n_sources":2,"endpoints":23369},{"n_sources":3,"endpoints":3967},{"n_sources":4,"endpoints":2}],"overlap_pairs":[{"sa":"a2a-registry-org","sb":"agenstry","n":467},{"sa":"a2a-registry-org","sb":"agent-tools-cloud","n":509},{"sa":"agenstry","sb":"agent-tools-cloud","n":6483},{"sa":"agenstry","sb":"docker-mcp-catalog","n":30},{"sa":"agenstry","sb":"mcp-registry-official","n":21706},{"sa":"agenstry","sb":"nanda-index","n":1},{"sa":"agent-tools-cloud","sb":"docker-mcp-catalog","n":2},{"sa":"agent-tools-cloud","sb":"mcp-registry-official","n":3730},{"sa":"agent-tools-cloud","sb":"nanda-index","n":2},{"sa":"agent-tools-cloud","sb":"x402-bazaar","n":2347},{"sa":"docker-mcp-catalog","sb":"mcp-registry-official","n":5}],"hosting_by_country":[{"country":"US","n":190861,"alive":57860},{"country":"DE","n":11428,"alive":4052},{"country":"GB","n":1244,"alive":702},{"country":"FR","n":930,"alive":395},{"country":"LT","n":847,"alive":339},{"country":"SG","n":678,"alive":325},{"country":"RU","n":620,"alive":434},{"country":"CN","n":352,"alive":111},{"country":"AE","n":306,"alive":77},{"country":"AT","n":221,"alive":126},{"country":"NL","n":211,"alive":40},{"country":"CA","n":144,"alive":41},{"country":"RO","n":116,"alive":102},{"country":"SE","n":104,"alive":18},{"country":"KR","n":99,"alive":40},{"country":"CH","n":73,"alive":29},{"country":"JP","n":72,"alive":23},{"country":"CY","n":72,"alive":13},{"country":"PL","n":64,"alive":20},{"country":"AU","n":64,"alive":18}],"method":"https://agentprobe.org/methodology","license":"CC BY 4.0, cite as: agentprobe.org, 2026-10-06"}