{"id":"2026-09-22","computed_at":"2026-09-22T23:41:21+00:00","stats":{"generated":{"sources":37,"listings":971192,"endpoints":151440,"probed":151165,"alive":53207,"conformant":37220,"last_probe":"2026-09-22T23:39:23+00:00","first_probe":"2026-09-07T00:05:52+00:00","pct_alive":35.2,"pct_conformant":24.6,"probes_total":2375155},"by_kind":[{"kind":"a2a","total":8877,"ok":838,"auth-required":254,"card-invalid":1297,"protocol-mismatch":1660,"http-error":3677,"timeout":209,"tls-fail":163,"connect-fail":46,"dns-fail":483,"blocked":14,"unprobeable":236},{"kind":"agent-facts","total":222,"ok":46,"auth-required":0,"card-invalid":1,"protocol-mismatch":0,"http-error":173,"timeout":0,"tls-fail":0,"connect-fail":0,"dns-fail":1,"blocked":1,"unprobeable":0},{"kind":"agents-txt","total":40014,"ok":568,"auth-required":0,"card-invalid":0,"protocol-mismatch":3854,"http-error":29644,"timeout":432,"tls-fail":388,"connect-fail":144,"dns-fail":1476,"blocked":3508,"unprobeable":0},{"kind":"ard","total":40020,"ok":662,"auth-required":0,"card-invalid":3547,"protocol-mismatch":0,"http-error":33313,"timeout":432,"tls-fail":422,"connect-fail":141,"dns-fail":1489,"blocked":14,"unprobeable":0},{"kind":"llm-api","total":189,"ok":69,"auth-required":101,"card-invalid":0,"protocol-mismatch":4,"http-error":10,"timeout":0,"tls-fail":0,"connect-fail":0,"dns-fail":1,"blocked":4,"unprobeable":0},{"kind":"llms-txt","total":54374,"ok":21097,"auth-required":0,"card-invalid":1981,"protocol-mismatch":3295,"http-error":21654,"timeout":578,"tls-fail":479,"connect-fail":205,"dns-fail":1536,"blocked":3549,"unprobeable":0},{"kind":"mcp","total":50631,"ok":11124,"auth-required":15093,"card-invalid":0,"protocol-mismatch":12942,"http-error":9015,"timeout":803,"tls-fail":352,"connect-fail":118,"dns-fail":1087,"blocked":97,"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":40012,"ok":19242,"auth-required":0,"card-invalid":0,"protocol-mismatch":0,"http-error":18085,"timeout":717,"tls-fail":352,"connect-fail":143,"dns-fail":1459,"blocked":14,"unprobeable":0},{"kind":"sigdir","total":40019,"ok":272,"auth-required":0,"card-invalid":3750,"protocol-mismatch":0,"http-error":30024,"timeout":419,"tls-fail":340,"connect-fail":144,"dns-fail":1458,"blocked":3612,"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":51436,"ok":24526,"auth-required":539,"card-invalid":0,"protocol-mismatch":1228,"http-error":22461,"timeout":494,"tls-fail":430,"connect-fail":238,"dns-fail":1508,"blocked":12,"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":"2026-09-22T23:40:14+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":208324,"endpoints":35454,"probed":35418,"alive":16945,"conformant":11104,"pct_alive":47.8},{"id":"agent-tools-cloud","name":"agent-tools.cloud","listings":65343,"endpoints":38539,"probed":38498,"alive":14888,"conformant":12288,"pct_alive":38.7},{"id":"mcp-registry-official","name":"Official MCP Registry","listings":34715,"endpoints":21321,"probed":21321,"alive":15727,"conformant":10319,"pct_alive":73.8},{"id":"x402-bazaar","name":"x402 Bazaar (Coinbase CDP discovery)","listings":21666,"endpoints":14763,"probed":14666,"alive":11028,"conformant":10870,"pct_alive":75.2},{"id":"npm-keyword-mcp","name":"npm packages with keyword mcp / mcp-server","listings":18406,"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":10951,"endpoints":10713,"probed":10703,"alive":46,"conformant":0,"pct_alive":0.4},{"id":"agentverse-fetch-ai","name":"Agentverse (Fetch.ai Almanac)","listings":10279,"endpoints":0,"probed":0,"alive":0,"conformant":0,"pct_alive":null},{"id":"github-topic-mcp-server","name":"GitHub repositories tagged mcp-server","listings":1050,"endpoints":0,"probed":0,"alive":0,"conformant":0,"pct_alive":null},{"id":"openrouter-models","name":"OpenRouter models API","listings":480,"endpoints":0,"probed":0,"alive":0,"conformant":0,"pct_alive":null},{"id":"a2a-registry-org","name":"A2A Registry (a2aregistry.org)","listings":457,"endpoints":432,"probed":431,"alive":284,"conformant":257,"pct_alive":65.9},{"id":"nanda-index","name":"Project NANDA Index (MIT)","listings":322,"endpoints":225,"probed":112,"alive":7,"conformant":6,"pct_alive":6.2},{"id":"smithery","name":"Smithery Registry","listings":307,"endpoints":262,"probed":262,"alive":259,"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":224,"endpoints":188,"probed":188,"alive":169,"conformant":69,"pct_alive":89.9},{"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":66224},{"n_sources":2,"endpoints":22048},{"n_sources":3,"endpoints":3830},{"n_sources":4,"endpoints":2}],"overlap_pairs":[{"sa":"a2a-registry-org","sb":"agenstry","n":386},{"sa":"a2a-registry-org","sb":"agent-tools-cloud","n":426},{"sa":"agenstry","sb":"agent-tools-cloud","n":5952},{"sa":"agenstry","sb":"docker-mcp-catalog","n":30},{"sa":"agenstry","sb":"mcp-registry-official","n":20790},{"sa":"agent-tools-cloud","sb":"docker-mcp-catalog","n":2},{"sa":"agent-tools-cloud","sb":"mcp-registry-official","n":3460},{"sa":"agent-tools-cloud","sb":"nanda-index","n":2},{"sa":"agent-tools-cloud","sb":"x402-bazaar","n":2497},{"sa":"docker-mcp-catalog","sb":"mcp-registry-official","n":5}],"hosting_by_country":[{"country":"US","n":131868,"alive":47160},{"country":"DE","n":9057,"alive":3347},{"country":"GB","n":1064,"alive":666},{"country":"LT","n":654,"alive":260},{"country":"FR","n":631,"alive":310},{"country":"RU","n":547,"alive":411},{"country":"SG","n":503,"alive":290},{"country":"AE","n":281,"alive":117},{"country":"CN","n":266,"alive":90},{"country":"AT","n":167,"alive":114},{"country":"NL","n":101,"alive":23},{"country":"CA","n":99,"alive":26},{"country":"SE","n":86,"alive":15},{"country":"RO","n":84,"alive":80},{"country":"KR","n":74,"alive":33},{"country":"CH","n":52,"alive":20},{"country":"PL","n":50,"alive":19},{"country":"CY","n":50,"alive":10},{"country":"AU","n":48,"alive":18},{"country":"JP","n":43,"alive":18}],"method":"https://agentprobe.org/methodology","license":"CC BY 4.0, cite as: agentprobe.org, 2026-09-22"}