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.loopxxi/loop-mcp
https://mcp.loopxxi.com/mcp
404 not listed mcp.loopxxi.com
com.loppee/loppee
https://loppee.com/mcp
gated, needs a credential not listed loppee.com
com.loxoneai/loxone-ai
https://cloud.loxoneai.com/cloud/mcp
gated, needs a credential not listed cloud.loxoneai.com
com.luckmeai/mcp
https://mcp.luckmeai.com/mcp/luckmeai/mcp
gated, needs a credential not listed mcp.luckmeai.com
com.lumethic/verify
https://api.lumethic.com/mcp
answered, not MCP not listed api.lumethic.com
com.luneresearch/lune
https://mcp.luneresearch.com/mcp
gated, needs a credential not listed mcp.luneresearch.com
com.luneresearch/lune
https://mcp.luneresearch.com
gated, needs a credential not listed mcp.luneresearch.com
com.lusha.mcp/mcp
https://mcp.lusha.com/mcp
404 not listed mcp.lusha.com
com.lutolearn/myaitwin
https://myaitwin.lutolearn.com/mcp
gated, needs a credential not listed myaitwin.lutolearn.com
com.lvlupauto/vendor-catalog
https://lvlupauto.com/api/mcp
gated, needs a credential not listed lvlupauto.com
com.lyssna/mcp
https://mcp.lyssna.com/mcp
gated, needs a credential not listed mcp.lyssna.com
com.mabl/mcp
https://mcp.mabl.com/mcp
gated, needs a credential not listed mcp.mabl.com
com.mabl/mcp
https://mcp.mabl.com/sse
404 not listed mcp.mabl.com
com.maevesocial/maeve-social
https://api.maevesocial.com/mcp
gated, needs a credential not listed api.maevesocial.com
agent-mcp
https://mcp.maggiegeller.com/mcp
answers a handshake not listed mcp.maggiegeller.com
com.magnificentjobs/jobs
https://magnificentjobs.com/mcp
unreachable not listed magnificentjobs.com
com.maha-os/cognitive-gateway
https://mcp.maha-os.com/mcp/sse
404 not listed mcp.maha-os.com
com.mailbox-mcp/mailbox-mcp
https://mcp.mailbox-mcp.com/db/mcp
gated, needs a credential not listed mcp.mailbox-mcp.com
com.mailbuttons/mcp-server
https://mailbuttons.com/api/v1/mcp/rpc
gated, needs a credential not listed mailbuttons.com
com.mailfixture/mailfixture
https://mailfixture.com/mcp
gated, needs a credential not listed mailfixture.com
com.mailinapp/mcp
https://mailinapp.com/api/mcp
gated, needs a credential not listed mailinapp.com
com.mailopoly/mailopoly
https://fastapi.prod.aws.mailopoly.com/mcp-server
gated, needs a credential not listed fastapi.prod.aws.mailopoly.com
com.mailtempo/mailtempo
https://mailtempo.com/api/mcp
answered, not MCP not listed mailtempo.com
com.make/mcp-server
https://mcp.make.com/sse
404 not listed mcp.make.com
com.make/mcp-server
https://mcp.make.com
gated, needs a credential not listed mcp.make.com
com.makerreels/makerreels
https://makerreels.com/api/mcp
gated, needs a credential not listed makerreels.com
com.malgorath.scrub-mcp/scrub-mcp
https://scrub-mcp.malgorath.com/mcp/
server error not listed scrub-mcp.malgorath.com
com.managelm/managelm
https://app.managelm.com/mcp
gated, needs a credential not listed app.managelm.com
com.managelm/managelm
https://{portal_host}/mcp
unreachable not listed {portal_host}
com.mangoinventory/mango-inventory
https://mcp.mangoinventory.com/mcp
gated, needs a credential not listed mcp.mangoinventory.com
com.manyscripts/transcripts
https://www.manyscripts.com/api/mcp
gated, needs a credential not listed www.manyscripts.com
com.maplith/maplith
https://app.maplith.com/api/mcp
gated, needs a credential not listed app.maplith.com
com.mareaalcalina/storefront
https://mcp.mareaalcalina.com/mcp
gated, needs a credential not listed mcp.mareaalcalina.com
com.maregeu/mcp
https://mcp.maregeu.com/mcp
unreachable not listed mcp.maregeu.com
com.market-graphs/mcp
https://mcp.market-graphs.com/mcp
gated, needs a credential not listed mcp.market-graphs.com
com.marketcheck/api
https://mc-api.marketcheck.com/mcp
gated, needs a credential not listed mc-api.marketcheck.com
com.marketcheck/marketcheck-ai-reports
https://reports.marketcheck.com/mcp
gated, needs a credential not listed reports.marketcheck.com
com.markifact/mcp
https://api.markifact.com/mcp
gated, needs a credential not listed api.markifact.com
com.markmesh/trademarks
https://markmesh.com/api/v1/mcp
gated, needs a credential not listed markmesh.com
com.markupbase/markupbase
https://mcp.markupbase.com/mcp
gated, needs a credential not listed mcp.markupbase.com
com.mathismeadows/roamer-mcp
https://roamer-mcp.mathismeadows.com/mcp
gated, needs a credential not listed roamer-mcp.mathismeadows.com
com.matterfact/matterfact
https://mcp.matterfact.com/mcp
gated, needs a credential not listed mcp.matterfact.com
com.maxoperf/maxoperf
https://app.maxoperf.com/mcp
gated, needs a credential not listed app.maxoperf.com
com.maxvideoai/maxvideoai
https://api.maxvideoai.com/mcp
gated, needs a credential not listed api.maxvideoai.com
com.mcp-ads/mcp-ads
https://mcp-ads.com/mcp-slim
gated, needs a credential not listed mcp-ads.com
com.mcparmory/algolia-search
https://mcp.mcparmory.com/algolia-search
unreachable not listed mcp.mcparmory.com
com.mcparmory/github
https://mcp.mcparmory.com/github
unreachable not listed mcp.mcparmory.com
com.mcparmory/google-search
https://mcp.mcparmory.com/google-search
unreachable not listed mcp.mcparmory.com
com.mcparmory/postmark
https://mcp.mcparmory.com/postmark
unreachable not listed mcp.mcparmory.com
com.mcparmory/ragie
https://mcp.mcparmory.com/ragie
unreachable not listed mcp.mcparmory.com
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