Which MCP servers actually work?

We track 53360 servers from the official MCP Registry. 35490 are hosted (remote); we have health-checked 35196 so far. 305 use templated URLs that need user-specific values and can't be checked. Of those checked, 21114 passed a full MCP handshake, 10166 are up but need credentials, and 3916 failed or were unreachable (last check 2026-10-30T19:00:35.112Z UTC). How we check.

ServerUsers (30 d)HandshakeAuthToolsLatencyLast checked (UTC)Category
ICO magic-byte check, file discarded
io.github.sadri-dridi/ico-bytes		0HealthyNone3122 ms2026-10-29T10:25:23.695Zagents-and-memory
HTTP 500 internal-error
io.github.sadri-dridi/http-500		0HealthyNone3117 ms2026-10-29T10:25:23.501Zagents-and-memory
IBAN length/charset, value discarded
io.github.sadri-dridi/iban-ok		0HealthyNone3116 ms2026-10-29T10:25:23.501Zagents-and-memory
HTTP 422 unprocessable
io.github.sadri-dridi/http-422		0HealthyNone3117 ms2026-10-29T10:25:23.500Zagents-and-memory
HTTP reason-phrase catalog size
io.github.sadri-dridi/http-reason		0HealthyNone3115 ms2026-10-29T10:25:23.499Zagents-and-memory
Hydra operation count, body discarded
io.github.sadri-dridi/hydra-ok		0HealthyNone3116 ms2026-10-29T10:25:23.498Zagents-and-memory
HTTP 429 too-many-requests
io.github.sadri-dridi/http-429		0HealthyNone3128 ms2026-10-29T10:25:23.310Zagents-and-memory
HTTP 451 unavailable-legal
io.github.sadri-dridi/http-451		0HealthyNone3128 ms2026-10-29T10:25:23.310Zagents-and-memory
HTTP 502 bad-gateway
io.github.sadri-dridi/http-502		0HealthyNone3129 ms2026-10-29T10:25:23.310Zagents-and-memory
HTTP 504 gateway-timeout
io.github.sadri-dridi/http-504		0HealthyNone3130 ms2026-10-29T10:25:23.310Zagents-and-memory
HZ ~{ ~} frame count, input discarded
io.github.sadri-dridi/hz-ok		0HealthyNone3126 ms2026-10-29T10:25:23.310Zagents-and-memory
HTTP 307 temporary-redirect
io.github.sadri-dridi/http-307		0HealthyNone3126 ms2026-10-29T10:25:23.307Zagents-and-memory
HTTP 431 header-fields-too-large
io.github.sadri-dridi/http-431		0HealthyNone3125 ms2026-10-29T10:25:23.307Zagents-and-memory
HTTP 503 unavailable
io.github.sadri-dridi/http-503		0HealthyNone3127 ms2026-10-29T10:25:23.307Zagents-and-memory
HTTP 507 insufficient-storage
io.github.sadri-dridi/http-507		0HealthyNone3124 ms2026-10-29T10:25:23.306Zagents-and-memory
HTTP Status
io.github.sadri-dridi/http-status		0HealthyNone3124 ms2026-10-29T10:25:23.305Zagents-and-memory
HTTP 505 http-version
io.github.sadri-dridi/http-505		0HealthyNone3123 ms2026-10-29T10:25:23.304Zagents-and-memory
HTTP 303 see-other
io.github.sadri-dridi/http-303		0HealthyNone31116 ms2026-10-29T10:25:23.110Zagents-and-memory
HTTP 410 gone
io.github.sadri-dridi/http-410		0HealthyNone31113 ms2026-10-29T10:25:23.082Zagents-and-memory
HTTP 418 teapot
io.github.sadri-dridi/http-418		0HealthyNone3153 ms2026-10-29T10:25:23.033Zagents-and-memory
HTTP 426 upgrade-required
io.github.sadri-dridi/http-426		0HealthyNone3154 ms2026-10-29T10:25:23.033Zagents-and-memory
HTTP 405 method-not-allowed
io.github.sadri-dridi/http-405		0HealthyNone3150 ms2026-10-29T10:25:23.029Zagents-and-memory
HTTP 413 payload-too-large
io.github.sadri-dridi/http-413		0HealthyNone3155 ms2026-10-29T10:25:23.029Zagents-and-memory
HTTP 425 too-early
io.github.sadri-dridi/http-425		0HealthyNone3149 ms2026-10-29T10:25:23.029Zagents-and-memory
HTTP 401 unauthorized
io.github.sadri-dridi/http-401		0HealthyNone3153 ms2026-10-29T10:25:23.027Zagents-and-memory
HTTP 406 not-acceptable
io.github.sadri-dridi/http-406		0HealthyNone3147 ms2026-10-29T10:25:23.025Zagents-and-memory
HTTP 408 request-timeout
io.github.sadri-dridi/http-408		0HealthyNone31214 ms2026-10-29T10:25:23.005Zagents-and-memory
HTTP 308 permanent-redirect
io.github.sadri-dridi/http-308		0HealthyNone31205 ms2026-10-29T10:25:23.004Zagents-and-memory
HTTP 414 uri-too-long
io.github.sadri-dridi/http-414		0HealthyNone31205 ms2026-10-29T10:25:23.002Zagents-and-memory
HTTP 403 forbidden
io.github.sadri-dridi/http-403		0HealthyNone31197 ms2026-10-29T10:25:22.753Zagents-and-memory
HTTP 302 found
io.github.sadri-dridi/http-302		0HealthyNone31174 ms2026-10-29T10:25:22.747Zagents-and-memory
HTTP 409 conflict
io.github.sadri-dridi/http-409		0HealthyNone31170 ms2026-10-29T10:25:22.746Zagents-and-memory
Horsepower to watts
io.github.sadri-dridi/hp-to-watt		0HealthyNone31168 ms2026-10-29T10:25:22.742Zagents-and-memory
HTTP 404 not-found
io.github.sadri-dridi/http-404		0HealthyNone31163 ms2026-10-29T10:25:22.741Zagents-and-memory
HTTP 415 unsupported-media
io.github.sadri-dridi/http-415		0HealthyNone31158 ms2026-10-29T10:25:22.731Zagents-and-memory
HTTP 201 created
io.github.sadri-dridi/http-201		0HealthyNone31153 ms2026-10-29T10:25:22.725Zagents-and-memory
HTTP 301 moved-permanently
io.github.sadri-dridi/http-301		0HealthyNone3127 ms2026-10-29T10:20:27.965Zagents-and-memory
HTTP 412 precondition-failed
io.github.sadri-dridi/http-412		0HealthyNone3127 ms2026-10-29T10:20:27.965Zagents-and-memory
HTTP 202 accepted
io.github.sadri-dridi/http-202		0HealthyNone3127 ms2026-10-29T10:20:27.963Zagents-and-memory
HTTP 206 partial-content
io.github.sadri-dridi/http-206		0HealthyNone3126 ms2026-10-29T10:20:27.963Zagents-and-memory
HTTP 400 bad-request
io.github.sadri-dridi/http-400		0HealthyNone3127 ms2026-10-29T10:20:27.963Zagents-and-memory
HTTP 204 no-content
io.github.sadri-dridi/http-204		0HealthyNone3124 ms2026-10-29T10:20:27.961Zagents-and-memory
HTTP 300 multiple-choices
io.github.sadri-dridi/http-300		0HealthyNone3125 ms2026-10-29T10:20:27.961Zagents-and-memory
HTTP 304 not-modified
io.github.sadri-dridi/http-304		0HealthyNone3124 ms2026-10-29T10:20:27.961Zagents-and-memory
Hebrew month 1-13 band
io.github.sadri-dridi/hebrew-mo		0HealthyNone3122 ms2026-10-29T10:20:27.959Zagents-and-memory
32 hex chars
io.github.sadri-dridi/hex-32		0HealthyNone3123 ms2026-10-29T10:20:27.959Zagents-and-memory
HTML h1 count, markup discarded
io.github.sadri-dridi/html-h1-n		0HealthyNone3123 ms2026-10-29T10:20:27.959Zagents-and-memory
BCP 47 lang attribute shape
io.github.sadri-dridi/html-lang-ok		0HealthyNone3121 ms2026-10-29T10:20:27.958Zagents-and-memory
Hex encode, input discarded
io.github.sadri-dridi/hex-ok		0HealthyNone3138 ms2026-10-29T10:20:26.324Zagents-and-memory
HTML numeric-entity count, input discarded
io.github.sadri-dridi/html-numesc		0HealthyNone3136 ms2026-10-29T10:20:26.324Zagents-and-memory

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