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, 23736 passed a full MCP handshake, 11765 are up but need credentials, and 4185 failed or were unreachable (last check 2026-11-08T13:50:20.252Z UTC). How we check.

ServerUsers (30 d)HandshakeAuthToolsLatencyLast checked (UTC)Category
UTC Thursday of the current ISO week
io.github.sadri-dridi/week-thu
0HealthyNone3119 ms2026-11-06T19:35:46.109Zagents-and-memory
UTC Monday of the current ISO week
io.github.sadri-dridi/week-mon
0HealthyNone3127 ms2026-11-06T19:35:45.992Zagents-and-memory
Watts to horsepower, number discarded
io.github.sadri-dridi/watt-hp
0HealthyNone3126 ms2026-11-06T19:35:45.986Zagents-and-memory
WAV RIFF check, file discarded
io.github.sadri-dridi/wav-riff
0HealthyNone3130 ms2026-11-06T19:35:45.986Zagents-and-memory
Web Fetch
io.github.sadri-dridi/web-fetch
0HealthyNone3130 ms2026-11-06T19:35:45.986Zagents-and-memory
WebP magic-byte check, file discarded
io.github.sadri-dridi/webp-magic
0HealthyNone3130 ms2026-11-06T19:35:45.986Zagents-and-memory
UTC ISO week number
io.github.sadri-dridi/week-number
0HealthyNone3125 ms2026-11-06T19:35:45.986Zagents-and-memory
UTC weekday name
io.github.sadri-dridi/weekday-utc
0HealthyNone3130 ms2026-11-06T19:35:45.986Zagents-and-memory
UUID v1 time-based shape
io.github.sadri-dridi/uuid-v1-shape
0HealthyNone3122 ms2026-11-06T19:35:45.982Zagents-and-memory
Weather Hint
io.github.sadri-dridi/weather-hint
0HealthyNone3125 ms2026-11-06T19:35:45.982Zagents-and-memory
UTC ISO week-date YYYY-Www-D
io.github.sadri-dridi/weekdate-ok
0HealthyNone3123 ms2026-11-06T19:35:45.982Zagents-and-memory
UUID no-hyphen 32-hex, value discarded
io.github.sadri-dridi/uuid-nhex
0HealthyNone3122 ms2026-11-06T19:35:45.979Zagents-and-memory
Via hop count, value discarded
io.github.sadri-dridi/via-ok
0HealthyNone3122 ms2026-11-06T19:35:45.976Zagents-and-memory
Watts to horsepower
io.github.sadri-dridi/watt-to-hp
0HealthyNone3120 ms2026-11-06T19:35:45.976Zagents-and-memory
WebAssembly magic-byte check, file discarded
io.github.sadri-dridi/wasm-magic
0HealthyNone3118 ms2026-11-06T19:35:45.971Zagents-and-memory
Via HTTP/1.1 hop count, value discarded
io.github.sadri-dridi/via-http
0HealthyNone3113 ms2026-11-06T19:35:45.964Zagents-and-memory
UTC weekday 1-7
io.github.sadri-dridi/weekday-number
0HealthyNone31726 ms2026-11-06T19:35:45.726Zagents-and-memory
vCard FN field count, body discarded
io.github.sadri-dridi/vcf-ok
0HealthyNone31591 ms2026-11-06T19:35:45.724Zagents-and-memory
WebM EBML check, file discarded
io.github.sadri-dridi/webm-magic
0HealthyNone311645 ms2026-11-06T19:35:45.717Zagents-and-memory
Volt-amperes to watts, number discarded
io.github.sadri-dridi/va-w
0HealthyNone311607 ms2026-11-06T19:35:45.706Zagents-and-memory
WCAG AAA contrast for two hex colors
io.github.sadri-dridi/wcag-aaa-ok
0HealthyNone311632 ms2026-11-06T19:35:45.706Zagents-and-memory
UTC ISO week-date shape
io.github.sadri-dridi/weekdate-utc
0HealthyNone311403 ms2026-11-06T19:35:45.706Zagents-and-memory
UUID v1 time layout, value discarded
io.github.sadri-dridi/uuid1-layout
0HealthyNone31743 ms2026-11-06T19:35:45.700Zagents-and-memory
UUID v6 time-reordered layout, value discarded
io.github.sadri-dridi/uuid6-ok
0HealthyNone31733 ms2026-11-06T19:35:45.700Zagents-and-memory
Vagrant config block count, body discarded
io.github.sadri-dridi/vagrant-ok
0HealthyNone31730 ms2026-11-06T19:35:45.700Zagents-and-memory
vCard shape, body discarded
io.github.sadri-dridi/vcard-ok
0HealthyNone31741 ms2026-11-06T19:35:45.700Zagents-and-memory
VIAF digit id, value discarded
io.github.sadri-dridi/viaf-ok
0HealthyNone31747 ms2026-11-06T19:35:45.700Zagents-and-memory
WADL resource count, body discarded
io.github.sadri-dridi/wadl-ok
0HealthyNone31733 ms2026-11-06T19:35:45.700Zagents-and-memory
WASM magic version, bytes discarded
io.github.sadri-dridi/wasm-ok
0HealthyNone31760 ms2026-11-06T19:35:45.700Zagents-and-memory
WAV RIFF check, file discarded
io.github.sadri-dridi/wav-magic
0HealthyNone30653 ms2026-11-06T19:35:45.700Zagents-and-memory
WCAG AA contrast for two hex colors
io.github.sadri-dridi/wcag-aa-ok
0HealthyNone31730 ms2026-11-06T19:35:45.700Zagents-and-memory
Vary header token count, value discarded
io.github.sadri-dridi/vary-ok
0HealthyNone31777 ms2026-11-06T19:35:45.655Zagents-and-memory
UUID v8 custom layout, value discarded
io.github.sadri-dridi/uuid8-ok
0HealthyNone31742 ms2026-11-06T19:35:44.765Zagents-and-memory
UUID v7 unix-ms layout, value discarded
io.github.sadri-dridi/uuid7-ok
0HealthyNone3128 ms2026-11-06T19:35:44.018Zagents-and-memory
UUID v5 name layout, value discarded
io.github.sadri-dridi/uuid5-layout
0HealthyNone31347 ms2026-11-06T19:35:43.869Zagents-and-memory
UUID Base58 shape, value discarded
io.github.sadri-dridi/uuid-b58
0HealthyNone3146 ms2026-11-06T19:35:43.868Zagents-and-memory
Utility 148
io.github.sadri-dridi/util-148
0HealthyNone3145 ms2026-11-06T19:35:43.867Zagents-and-memory
Utility 143
io.github.sadri-dridi/util-143
0HealthyNone31125 ms2026-11-06T19:35:43.865Zagents-and-memory
Utility 142
io.github.sadri-dridi/util-142
0HealthyNone31126 ms2026-11-06T19:35:43.862Zagents-and-memory
UUID v3 MD5-name layout, value discarded
io.github.sadri-dridi/uuid3-ok
0HealthyNone31131 ms2026-11-06T19:35:43.862Zagents-and-memory
UUID v5 SHA1-name layout, value discarded
io.github.sadri-dridi/uuid5-ok
0HealthyNone31154 ms2026-11-06T19:35:43.861Zagents-and-memory
UUID v4 random-bit layout, value discarded
io.github.sadri-dridi/uuid4-ok
0HealthyNone31308 ms2026-11-06T19:35:43.858Zagents-and-memory
Utility 145
io.github.sadri-dridi/util-145
0HealthyNone31301 ms2026-11-06T19:35:43.856Zagents-and-memory
urn:uuid shape, value discarded
io.github.sadri-dridi/uuid-urn
0HealthyNone31343 ms2026-11-06T19:35:43.855Zagents-and-memory
Nil UUID constant
io.github.sadri-dridi/uuid-nil
0HealthyNone31337 ms2026-11-06T19:35:43.839Zagents-and-memory
UUID v7 time-sortable shape
io.github.sadri-dridi/uuid-v7-shape
0HealthyNone3185 ms2026-11-06T19:35:43.817Zagents-and-memory
urn:uuid lowercase, value discarded
io.github.sadri-dridi/uuid-urn2
0HealthyNone31100 ms2026-11-06T19:35:43.813Zagents-and-memory
UUID shape check
io.github.sadri-dridi/uuid-shape
0HealthyNone3179 ms2026-11-06T19:35:43.810Zagents-and-memory
Utility 158
io.github.sadri-dridi/util-158
0HealthyNone31125 ms2026-11-06T19:35:43.510Zagents-and-memory
Utility 146
io.github.sadri-dridi/util-146
0HealthyNone311870 ms2026-11-06T19:30:47.690Zagents-and-memory

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