Which MCP servers actually work?

We track 59133 servers from the official MCP Registry. 40018 are hosted (remote); we have health-checked 39686 so far. 343 use templated URLs that need user-specific values and can't be checked. Of those checked, 23738 passed a full MCP handshake, 11763 are up but need credentials, and 4185 failed or were unreachable (last check 2026-11-08T11:40:27.816Z UTC). How we check.

ServerUsers (30 d)HandshakeAuthToolsLatencyLast checked (UTC)Category
US pints to liters, number discarded
io.github.sadri-dridi/pt-l		0HealthyNone3139 ms2026-11-06T18:20:44.949Zagents-and-memory
Punycode length, input discarded
io.github.sadri-dridi/punycode-len		0HealthyNone3136 ms2026-11-06T18:20:44.942Zagents-and-memory
Protobuf wire-type scan, body discarded
io.github.sadri-dridi/protobuf-ok		0HealthyNone3112 ms2026-11-06T18:20:44.590Zagents-and-memory
PSI to bar, number discarded
io.github.sadri-dridi/psi-bar		0HealthyNone3111 ms2026-11-06T18:20:44.590Zagents-and-memory
PS metric horsepower to watts, number discarded
io.github.sadri-dridi/ps-w		0HealthyNone31192 ms2026-11-06T18:20:44.575Zagents-and-memory
Protobuf field-tag count, body discarded
io.github.sadri-dridi/proto-ok		0HealthyNone3118 ms2026-11-06T18:20:44.573Zagents-and-memory
Proxy-Authenticate scheme token, value discarded
io.github.sadri-dridi/proxy-auth		0HealthyNone3115 ms2026-11-06T18:20:44.557Zagents-and-memory
Port 993
io.github.sadri-dridi/port-993		0HealthyNone31160 ms2026-11-06T18:20:44.542Zagents-and-memory
Port 587
io.github.sadri-dridi/port-587		0HealthyNone3115 ms2026-11-06T18:20:44.539Zagents-and-memory
Integer power band, numbers discarded
io.github.sadri-dridi/pow-ok		0HealthyNone3114 ms2026-11-06T18:20:44.538Zagents-and-memory
PSI to kilopascals, number discarded
io.github.sadri-dridi/psi-kpa		0HealthyNone3117 ms2026-11-06T18:20:44.521Zagents-and-memory
protobuf3 message count, body discarded
io.github.sadri-dridi/proto3-ok		0HealthyNone3115 ms2026-11-06T18:20:44.485Zagents-and-memory
PDF URL Check
io.github.sadri-dridi/pdf-url-ok		0HealthyNone3150 ms2026-11-06T18:20:44.454Zproductivity
Port 80
io.github.sadri-dridi/port-80		0HealthyNone3162 ms2026-11-06T18:20:44.454Zagents-and-memory
UK postcode shape, value discarded
io.github.sadri-dridi/postcode-uk-ok		0HealthyNone31311 ms2026-11-06T18:20:44.453Zagents-and-memory
Remnalis
io.github.prestymdq/remnalis		0HealthyNone6957 ms2026-11-06T18:15:48.640Zagents-and-memory
Port 995
io.github.sadri-dridi/port-995		0HealthyNone3125 ms2026-11-06T18:15:47.648Zagents-and-memory
Port 8080
io.github.sadri-dridi/port-8080		0HealthyNone3113 ms2026-11-06T18:15:47.643Zagents-and-memory
Postgres URL Shape
io.github.sadri-dridi/postgres-url-shape		0HealthyNone3110 ms2026-11-06T18:15:47.643Zdata-and-databases
Priority u=/i= pair count, value discarded
io.github.sadri-dridi/priority-ok		0HealthyNone3114 ms2026-11-06T18:15:47.636Zagents-and-memory
TCP/UDP port range
io.github.sadri-dridi/port-ok		0HealthyNone3112 ms2026-11-06T18:15:47.616Zagents-and-memory
Prettier JSON/YAML key count, body discarded
io.github.sadri-dridi/prettierrc-ok		0HealthyNone3115 ms2026-11-06T18:15:47.598Zagents-and-memory
Imperial pints to liters, number discarded
io.github.sadri-dridi/pint-imp-l		0HealthyNone3116 ms2026-11-06T18:15:47.593Zagents-and-memory
Pragma token charset, value discarded
io.github.sadri-dridi/pragma-ok		0HealthyNone3117 ms2026-11-06T18:15:47.524Zagents-and-memory
Canadian postal code shape, value discarded
io.github.sadri-dridi/postcode-ca-ok		0HealthyNone3014 ms2026-11-06T18:15:47.513Zagents-and-memory
Maven POM coordinate shape, body discarded
io.github.sadri-dridi/pom-ok		0HealthyNone3017 ms2026-11-06T18:15:47.491Zagents-and-memory
Port 8443
io.github.sadri-dridi/port-8443		0HealthyNone3113 ms2026-11-06T18:15:47.490Zagents-and-memory
Port 465
io.github.sadri-dridi/port-465		0HealthyNone3116 ms2026-11-06T18:15:47.480Zagents-and-memory
Port 53
io.github.sadri-dridi/port-53		0HealthyNone3111 ms2026-11-06T18:15:47.474Zagents-and-memory
Port 6379
io.github.sadri-dridi/port-6379		0HealthyNone3112 ms2026-11-06T18:15:47.468Zagents-and-memory
Port 3306
io.github.sadri-dridi/port-3306		0HealthyNone3111 ms2026-11-06T18:15:47.460Zagents-and-memory
Port 5432
io.github.sadri-dridi/port-5432		0HealthyNone3112 ms2026-11-06T18:15:47.456Zagents-and-memory
Port 443
io.github.sadri-dridi/port-443		0HealthyNone3114 ms2026-11-06T18:15:47.450Zagents-and-memory
Port 21
io.github.sadri-dridi/port-21		0HealthyNone3111 ms2026-11-06T18:15:47.440Zagents-and-memory
Port 27017
io.github.sadri-dridi/port-27017		0HealthyNone3112 ms2026-11-06T18:15:47.440Zagents-and-memory
Port 23
io.github.sadri-dridi/port-23		0HealthyNone3110 ms2026-11-06T18:15:47.439Zagents-and-memory
Port 22
io.github.sadri-dridi/port-22		0HealthyNone3112 ms2026-11-06T18:15:47.416Zagents-and-memory
Port 20
io.github.sadri-dridi/port-20		0HealthyNone3112 ms2026-11-06T18:15:47.412Zagents-and-memory
plist key count, values discarded
io.github.sadri-dridi/plist-ok		0HealthyNone3111 ms2026-11-06T18:15:47.253Zagents-and-memory
Port 143
io.github.sadri-dridi/port-143		0HealthyNone3111 ms2026-11-06T18:15:47.243Zagents-and-memory
Percent-encode triplet count, input discarded
io.github.sadri-dridi/percent-ok		0HealthyNone3161 ms2026-11-06T18:15:47.234Zagents-and-memory
PNL Toolkit
com.pnltoolkit/calculators		0HealthyNone81156 ms2026-11-06T18:15:47.218Zecommerce
Permissions-Policy directive count, value discarded
io.github.sadri-dridi/permissions-ok		0HealthyNone311316 ms2026-11-06T18:15:47.202Zagents-and-memory
E.164 shape, number discarded
io.github.sadri-dridi/phone-e164-shape		0HealthyNone311280 ms2026-11-06T18:15:47.202Zagents-and-memory
Whether Persian year is leap
io.github.sadri-dridi/persian-leap		0HealthyNone311236 ms2026-11-06T18:15:47.106Zagents-and-memory
Poles to meters, number discarded
io.github.sadri-dridi/pole-m		0HealthyNone3117 ms2026-11-06T18:15:47.035Zagents-and-memory
Poly1305 tag length, input discarded
io.github.sadri-dridi/poly1305-ok		0HealthyNone3116 ms2026-11-06T18:15:47.033Zagents-and-memory
Port 110
io.github.sadri-dridi/port-110		0HealthyNone3124 ms2026-11-06T18:15:47.013Zagents-and-memory
PNG magic-byte check, file discarded
io.github.sadri-dridi/png-magic		0HealthyNone3128 ms2026-11-06T18:15:47.010Zagents-and-memory
a as percent of b, numbers discarded
io.github.sadri-dridi/percent-of		0HealthyNone3128 ms2026-11-06T18:15:47.002Zagents-and-memory

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