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wellknown

A live, machine-queryable index of AI agents, MCP servers and tools. Every record separates what publishers declare from what we observed.

Product
  • Search
  • Capabilities
  • Reliability report
  • Journal
  • Sources & freshness
  • Network status
Developers
  • Documentation
  • HTTP API
  • MCP server
  • Claim an agent
  • Dashboard
For machines
  • llms.txt
  • openapi.json
  • agent-card.json
  • sitemap.xml
  • About our crawler
Records are indexed from public sources and attributed to them. Observed data is ours; declared data is theirs.v0.1 · early network
Transparency

Sources, adapters and crawl runs

The index is assembled from public, documented sources. Each record keeps the raw upstream payload and the time it was fetched. Nothing is added by hand.

npm registry
4.5k

npm registry search for packages published as MCP servers or agents.

last fetch 26 min ago · first record 5 h ago · resumable cursor saved
Official MCP Registry
3.7k

Official Model Context Protocol registry (server.json documents with packages and remotes).

last fetch 25 min ago · first record 5 h ago · resumable cursor saved
GitHub curated lists
600

Curated public lists of MCP servers and agents maintained on GitHub.

last fetch 24 min ago · first record 5 h ago
Wellknown seed list
15

Remote endpoints curated from vendor documentation (data/seeds/remote-endpoints.json).

last fetch 24 min ago · first record 5 h ago
PyPI
89

PyPI registry facts for records distributed as Python packages.

last fetch 24 min ago · first record 5 h ago
A2A Agent Card
384

A2A Agent Cards fetched from /.well-known on candidate hosts.

last fetch 19 min ago · first record 5 h ago
ARD catalog (/.well-known/ard.json)
4

ARD catalogs (/.well-known/ard.json, ai-catalog.json, robots Agentmap) on candidate hosts.

last fetch 18 min ago · first record 19 min ago
Self-submissions

Agents announced through the API or MCP tool. Lowest priority source until the publisher claims the record.

0

Recent runs

jobstarteddurationresulterrors
probe18 min agorunning
ingest:ard_catalog19 min ago83sfailed 0 · created 1 · fetched 4 · updated 3 · unchanged 01: https://www.feode.com/.well-known/ai-catalog.json: no entries array
ingest:a2a_card24 min ago303sfailed 0 · created 17 · fetched 25 · updated 8 · unchanged 06: https://www.immersivecommons.com/.well-known/agent-card.json: capabilities: Inva
ingest:pypi24 min ago7sfailed 0 · created 0 · fetched 21 · updated 21 · unchanged 01: glitch-grow-linkedin-ad-mcp: 404
ingest:seed24 min ago0sfailed 0 · created 0 · fetched 15 · updated 0 · unchanged 15
ingest:github24 min ago3sfailed 0 · created 0 · fetched 600 · updated 0 · unchanged 600
ingest:mcp_registry25 min ago36sfailed 0 · created 618 · fetched 647 · updated 29 · unchanged 0
ingest:npm26 min ago43sfailed 0 · created 718 · fetched 750 · updated 32 · unchanged 0
probe1 h ago40sok 111 · failed 0 · probed 200 · selected 200
ingest:a2a_card1 h ago294sfailed 0 · created 44 · fetched 58 · updated 12 · unchanged 211: https://descontosml.com/.well-known/agent.json: capabilities: Invalid input: exp
ingest:pypi1 h ago4sfailed 0 · created 0 · fetched 14 · updated 14 · unchanged 0
ingest:seed1 h ago0sfailed 0 · created 0 · fetched 15 · updated 0 · unchanged 15
ingest:github1 h ago3sfailed 0 · created 0 · fetched 600 · updated 0 · unchanged 600
ingest:mcp_registry1 h ago56sfailed 0 · created 583 · fetched 623 · updated 40 · unchanged 0
ingest:npm1 h ago50sfailed 0 · created 710 · fetched 750 · updated 40 · unchanged 0
probe2 h ago26sok 174 · failed 0 · probed 200 · selected 200
ingest:a2a_card2 h ago329sfailed 0 · created 59 · fetched 72 · updated 11 · unchanged 210: https://www.apideck.com/.well-known/agent-card.json: capabilities: Invalid input
ingest:pypi2 h ago6sfailed 0 · created 0 · fetched 21 · updated 21 · unchanged 0
ingest:seed2 h ago0sfailed 0 · created 0 · fetched 15 · updated 0 · unchanged 15
ingest:github2 h ago3sfailed 0 · created 0 · fetched 600 · updated 0 · unchanged 600
ingest:mcp_registry2 h ago37sfailed 0 · created 547 · fetched 612 · updated 65 · unchanged 0
ingest:npm2 h ago50sfailed 0 · created 694 · fetched 750 · updated 56 · unchanged 0
probe3 h ago22sok 161 · failed 0 · probed 200 · selected 200
ingest:a2a_card3 h ago341sfailed 0 · created 36 · fetched 43 · updated 6 · unchanged 17: https://zwier.app/.well-known/agent-card.json: not JSON
ingest:pypi3 h ago2sfailed 0 · created 0 · fetched 6 · updated 6 · unchanged 0
ingest:seed3 h ago0sfailed 0 · created 0 · fetched 15 · updated 0 · unchanged 15
ingest:github3 h ago3sfailed 0 · created 0 · fetched 600 · updated 0 · unchanged 600
ingest:mcp_registry3 h ago33sfailed 0 · created 570 · fetched 610 · updated 40 · unchanged 0
ingest:npm3 h ago52sfailed 0 · created 679 · fetched 750 · updated 71 · unchanged 0
probe4 h ago28sok 176 · failed 0 · probed 200 · selected 200