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
io.github.voicelogica/voice-logica
https://api.voicelogica.ai/api/v1/mcp
gated, needs a credential not listed api.voicelogica.ai
io.github.volatility/vlab-mcp
https://vlab.stern.nyu.edu/mcp
gated, needs a credential not listed vlab.stern.nyu.edu
io.github.vuluu2k/webcake-landing-mcp
https://mcp.toolvn.io.vn/mcp
gated, needs a credential not listed mcp.toolvn.io.vn
io.github.vuluu2k/webcake-storefront-mcp
https://store.toolvn.io.vn/mcp
gated, needs a credential not listed store.toolvn.io.vn
io.github.waddou/mcp-noticiel
https://noticiel-mcp.wadie.workers.dev/sse
404 not listed noticiel-mcp.wadie.workers.dev
io.github.webdevelopers-eu/ipdefender-mcp
https://www.ipdefender.eu/mcp
gated, needs a credential not listed www.ipdefender.eu
io.github.wellknownmcp/agenthill
https://mcp.agenthill.lol/mcp
gated, needs a credential not listed mcp.agenthill.lol
io.github.wellknownmcp/animam-platform
https://mcp.animam.ai/mcp/sse
gated, needs a credential not listed mcp.animam.ai
io.github.wellknownmcp/animam-platform
https://mcp.animam.ai/mcp
gated, needs a credential not listed mcp.animam.ai
io.github.wellknownmcp/cortex-gateway
https://mcp.cortex-gateway.dev/mcp
gated, needs a credential not listed mcp.cortex-gateway.dev
io.github.wellknownmcp/hoshin-kanri
https://hoshin.app/mcp
gated, needs a credential not listed hoshin.app
io.github.westonhancock/orcha
https://app.tryorcha.com/mcp
gated, needs a credential not listed app.tryorcha.com
io.github.westvegh/tally-workout
https://mcp.tallyworkout.app/api/mcp
gated, needs a credential not listed mcp.tallyworkout.app
io.github.whisper-sec/whisper-graph
https://mcp.whisper.security
gated, needs a credential not listed mcp.whisper.security
io.github.whiteknightonhorse/apibase
https://apibase.pro/mcp
gated, needs a credential not listed apibase.pro
io.github.whitepepper355/liveability-mcp
https://liveability.jp/mcp/sse
404 not listed liveability.jp
io.github.wikatar/arkolith
https://arkolith.com/api/mcp
gated, needs a credential not listed arkolith.com
io.github.willians2018/ai-index-network
https://api.aindex-ai.com/v1/mcp
gated, needs a credential not listed api.aindex-ai.com
io.github.wistia/wistia-api-mcp
https://api.wistia.com/mcp/api
gated, needs a credential not listed api.wistia.com
io.github.wordofclout/acn-mcp-server
https://mcp.wordofclout.ai/mcp
gated, needs a credential not listed mcp.wordofclout.ai
io.github.workmagicio/workmagic-mcp
https://mcp.workmagic.io/mcp
gated, needs a credential not listed mcp.workmagic.io
io.github.wowcool/agentsafe
https://agentsafe.locationledger.com/mcp
gated, needs a credential not listed agentsafe.locationledger.com
io.github.write-space/writespace-mcp
https://app.writespace.io/mcp
gated, needs a credential not listed app.writespace.io
io.github.wtaylorwilson/shipcheck
https://realtor-all-enclosed-altered.trycloudflare.com/mcp
unreachable not listed realtor-all-enclosed-altered.trycloudflare.com
io.github.wubin1836/ai-hive-aigc
https://ai-hive.iclip.cn/api/mcp
gated, needs a credential not listed ai-hive.iclip.cn
io.github.wynnpay102-sys/awc-agent-commons
https://awc-agent-commons.wynnpay102.chatgpt.site/mcp
404 not listed awc-agent-commons.wynnpay102.chatgpt.site
io.github.xataio/mcp
https://api.xata.tech/mcp
gated, needs a credential not listed api.xata.tech
io.github.xbt786/hipaa-agent
https://hipaaagent.ai/api/mcp
JSON-RPC error not listed hipaaagent.ai
io.github.xhad/teamshared
https://teamshared.com/mcp
gated, needs a credential not listed teamshared.com
io.github.xitoring/mcp-server
https://app.xitoring.com/mcp
gated, needs a credential not listed app.xitoring.com
io.github.xllinbupt/liepin-jobs
https://open-mcp.liepin.com/servers/cc4a45655fc3432eaf346555d04be77e/mcp
404 not listed open-mcp.liepin.com
io.github.xpaysh/academic-research
https://research.mcp.xpay.sh/mcp?key={api_key}
answered, not MCP not listed research.mcp.xpay.sh
io.github.xpaysh/competitive-intel
https://compete.mcp.xpay.sh/mcp?key={api_key}
answered, not MCP not listed compete.mcp.xpay.sh
io.github.xpaysh/content-research
https://content.mcp.xpay.sh/mcp?key={api_key}
answered, not MCP not listed content.mcp.xpay.sh
io.github.xpaysh/devtools
https://devtools.mcp.xpay.sh/mcp?key={api_key}
answered, not MCP not listed devtools.mcp.xpay.sh
io.github.xpaysh/finance
https://finance.mcp.xpay.sh/mcp?key={api_key}
answered, not MCP not listed finance.mcp.xpay.sh
io.github.xpaysh/lead-gen
https://lead-gen.mcp.xpay.sh/mcp?key={api_key}
answered, not MCP not listed lead-gen.mcp.xpay.sh
io.github.xpaysh/marketing
https://marketing.mcp.xpay.sh/mcp?key={api_key}
answered, not MCP not listed marketing.mcp.xpay.sh
io.github.xpaysh/mcp-server
https://mcp.xpay.sh/mcp?key={api_key}
answered, not MCP not listed mcp.xpay.sh
io.github.xpaysh/media
https://media.mcp.xpay.sh/mcp?key={api_key}
answered, not MCP not listed media.mcp.xpay.sh
io.github.xpaysh/social-media
https://social.mcp.xpay.sh/mcp?key={api_key}
answered, not MCP not listed social.mcp.xpay.sh
io.github.xpaysh/web-scraping
https://scraping.mcp.xpay.sh/mcp?key={api_key}
answered, not MCP not listed scraping.mcp.xpay.sh
io.github.xplainable/xplainable-mcp-server
https://mcp.xplainable.io/mcp
gated, needs a credential not listed mcp.xplainable.io
io.github.yaos/limeflight-mcp
https://api.qa.limeflight.com/mcp
gated, needs a credential not listed api.qa.limeflight.com
io.github.yaotsakpo/inbin
https://inbin.dev/api/mcp
gated, needs a credential not listed inbin.dev
io.github.yaotsakpo/inbin
https://api.inbin.dev/mcp
gated, needs a credential not listed api.inbin.dev
io.github.yasaminfayyaz/milatexai
https://milatexai.com/mcp
unreachable not listed milatexai.com
io.github.yash1ts/shipdapp
https://api.shipdapp.com/api/mcp/sse
404 not listed api.shipdapp.com
io.github.ybentov1/chief-of-staff
https://api.team0.ai/mcp/mcp
gated, needs a credential not listed api.team0.ai
io.github.yeagoo/pkgseek
https://api.pkgseek.com/mcp
JSON-RPC error not listed api.pkgseek.com
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