MCP servers, called rather than listed

Every remote server in the official MCP registry, sent one real initialize handshake. 16,923 servers across 11,823 hosts.

Search what these servers can do · read the measurement

Last checked 2026-09-06. We send a handshake, we do not authenticate and we do not call a tool.

Gated is not broken. 4,068 of these servers answer with a 401 or 403. They are running and want a credential we do not have. A checker that treats them as dead is wrong about 24.0% of the registry before it starts, so we count them separately and always will.

16,923 matching.

serverresulttoolshost
com.consulatehq/consulate
https://api.consulatehq.com
unreachable not listed api.consulatehq.com
com.contadeo/mcp
https://contadeo.com/api/mcp
gated, needs a credential not listed contadeo.com
com.contextaco/contextaco
https://mcp.contextaco.com
gated, needs a credential not listed mcp.contextaco.com
com.contextflo/contextflo
https://mcp.contextflo.com/mcp
gated, needs a credential not listed mcp.contextflo.com
com.contextser.mcp/nodecel
https://mcp.contextser.com/nodecel/mcp
gated, needs a credential not listed mcp.contextser.com
com.contextser.mcp/nodecel
https://mcp.contextser.com/nodecel
gated, needs a credential not listed mcp.contextser.com
com.contextser.mcp/nodecel
https://mcp.nodecel.com
gated, needs a credential not listed mcp.nodecel.com
continueops-public
https://tjcjvxibsrxizwuajypz.supabase.co/functions/v1/mcp
answers a handshake not listed tjcjvxibsrxizwuajypz.supabase.co
com.controlargastos/gastos-compartidos
https://controlargastos.es/api/mcp
gated, needs a credential not listed controlargastos.es
com.controldrill/mcp
https://mcp.controldrill.com/mcp
gated, needs a credential not listed mcp.controldrill.com
com.convexvalue/cvserver
https://tap.convexvalue.com/api/data/mcp
gated, needs a credential not listed tap.convexvalue.com
com.convika/convika
https://mcp.convika.com/mcp
gated, needs a credential not listed mcp.convika.com
com.cookiefreeanalytics/mcp
https://www.cookiefreeanalytics.com/mcp
gated, needs a credential not listed www.cookiefreeanalytics.com
com.coresignal/mcp
https://mcp.coresignal.com/mcp/v2
gated, needs a credential not listed mcp.coresignal.com
com.cortexpad/cortexpad
https://api.cortexpad.com/mcp
gated, needs a credential not listed api.cortexpad.com
com.cosmicjs/mcp
https://mcp.cosmicjs.com/v1/buckets/{bucket_slug}
gated, needs a credential not listed mcp.cosmicjs.com
com.cotribute/mcp
https://mcp.cotribute.co
gated, needs a credential not listed mcp.cotribute.co
com.couillardelectricllc.voice/vera
https://voice.couillardelectricllc.com/mcp
answered, not MCP not listed voice.couillardelectricllc.com
countersignatory
https://countersignatory.com/mcp
answers a handshake not listed countersignatory.com
com.courseprofiler/courseprofiler
https://courseprofiler.com/mcp
unreachable not listed courseprofiler.com
com.covasyn/chemistry
https://mcp.covasyn.com/mcp
unreachable not listed mcp.covasyn.com
com.coverage-rights/coverage-rights
https://coverage-rights.com/api/mcp
JSON-RPC error not listed coverage-rights.com
com.coverthegaps/coverthegaps
https://coverthegaps.com/mcp
gated, needs a credential not listed coverthegaps.com
com.cpz-lab.mcp/cpzai
https://mcp.cpz-lab.com/mcp
gated, needs a credential not listed mcp.cpz-lab.com
com.crabbitmq/mcp
https://crabbitmq.com/mcp
unreachable not listed crabbitmq.com
com.craftablesoftware/mcp
https://mcp.craftablesoftware.com/mcp
unreachable not listed mcp.craftablesoftware.com
com.crashstory/crashstory
https://crashstory-mcp-production.up.railway.app/sse
404 not listed crashstory-mcp-production.up.railway.app
com.crawlconsole/crawlconsole
https://mcp.crawlconsole.com/mcp
gated, needs a credential not listed mcp.crawlconsole.com
com.crawlraven/mcp
https://mcp.crawlraven.com/mcp
gated, needs a credential not listed mcp.crawlraven.com
com.cre8techdev/mini-pricer-mcp
https://mp-mcp.cre8techdev.com/sse
gated, needs a credential not listed mp-mcp.cre8techdev.com
com.createmod/schematics
https://createmod.com/api/mcp
gated, needs a credential not listed createmod.com
com.crimsoncrawler/mcp-server
https://crimsoncrawler.com/mcp/v1
gated, needs a credential not listed crimsoncrawler.com
com.crisphive/mcp
https://api.crisphive.com/mcp
gated, needs a credential not listed api.crisphive.com
com.crixin/voice
https://crixin-platform.vercel.app/api/mcp
gated, needs a credential not listed crixin-platform.vercel.app
com.cross-deck/prism
https://api.cross-deck.com/mcp
gated, needs a credential not listed api.cross-deck.com
com.crowdhum/crowdhum
https://mcp.crowdhum.com
gated, needs a credential not listed mcp.crowdhum.com
com.cryptohopper/mcp-data
https://mcp-data.cryptohopper.com/mcp
gated, needs a credential not listed mcp-data.cryptohopper.com
com.cryptoquant/mcp-server
https://mcp.cryptoquant.com/mcp
gated, needs a credential not listed mcp.cryptoquant.com
com.csquaredsystems/mcp-registry-test
https://mcp.csquaredsystems.com/sse
404 not listed mcp.csquaredsystems.com
com.ctlsurf/notebook
https://app.ctlsurf.com/api/mcp
gated, needs a credential not listed app.ctlsurf.com
com.cualbet/cualbet-mcp
https://mcp.cualbet.com
unreachable not listed mcp.cualbet.com
com.custosa/tools
https://mcp.custosa.com/mcp
gated, needs a credential not listed mcp.custosa.com
com.cyclingcoachai/cycling-coach-ai
https://app.usecoachai.com/api/mcp
gated, needs a credential not listed app.usecoachai.com
com.cytado/cytado
https://cytado.com/api/mcp
gated, needs a credential not listed cytado.com
com.daedalmap/un_sdg
https://app.daedalmap.com/mcp/un_sdg
answers a handshake not listed app.daedalmap.com
com.daedalmap/volcanoes
https://app.daedalmap.com/mcp/volcanoes
answers a handshake not listed app.daedalmap.com
com.daedalmap/wildfires
https://app.daedalmap.com/mcp/wildfires
answers a handshake not listed app.daedalmap.com
com.daedalmap/world-development-indicators
https://app.daedalmap.com/mcp/world_bank_wdi
answers a handshake not listed app.daedalmap.com
com.daedalmap/world_factbook
https://app.daedalmap.com/mcp/world_factbook
answers a handshake not listed app.daedalmap.com
com.danubeai/danube
https://mcp.danubeai.com/mcp
gated, needs a credential not listed mcp.danubeai.com
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