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Which MCP servers are actually maintained?
The official registry lists every Model Context Protocol server but tells you nothing about whether any of them is still alive. This index scores each one on maintenance activity, flags what deserves a second look before you install it, and shows exactly how every number was reached.
49,991
servers indexed
87
with verified activity
20.0
median score
17,377
carrying risk flags
last refreshed
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Leaderboard
Activity & maintenance, not security — how this is scored| # | Server | Flags | Stars | Change | Score |
|---|---|---|---|---|---|
| 23701 | Pascals to bar Pascals to bar | info | — | — | 21.0 |
| 23702 | Whether Persian year is leap Whether Persian year is leap | info | — | — | 21.0 |
| 23703 | Persian year band Persian year band | info | — | — | 21.0 |
| 23704 | E.164 shape, number discarded E.164 shape, number discarded | info | — | — | 21.0 |
| 23705 | TCP/UDP port range TCP/UDP port range | info | — | — | 21.0 |
| 23706 | PSI to bar, number discarded PSI to bar, number discarded | info | — | — | 21.0 |
| 23707 | PSI to kilopascals PSI to kilopascals | info | — | — | 21.0 |
| 23708 | Public suffix count Public suffix count | info | — | — | 21.0 |
| 23709 | puid charset, value discarded puid charset, value discarded | info | — | — | 21.0 |
| 23710 | Punycode host check Punycode host check | info | — | — | 21.0 |
| 23711 | Firebase PushID shape Firebase PushID shape | info | — | — | 21.0 |
| 23712 | Calendar quarter 1-4 band Calendar quarter 1-4 band | info | — | — | 21.0 |
| 23713 | Quarter 1-4 band Quarter 1-4 band | info | — | — | 21.0 |
| 23714 | UTC quarter UTC quarter | info | — | — | 21.0 |
| 23715 | 16 random hex chars 16 random hex chars | info | — | — | 21.0 |
| 23716 | 32 random hex chars 32 random hex chars | info | — | — | 21.0 |
| 23717 | 8 random hex chars 8 random hex chars | info | — | — | 21.0 |
| 23718 | Range header shape Range header shape | info | — | — | 21.0 |
| 23719 | Rata Die day band Rata Die day band | info | — | — | 21.0 |
| 23720 | Rata Die integer band Rata Die integer band | info | — | — | 21.0 |
| 23721 | Redirect hop count band 0-5 Redirect hop count band 0-5 | info | — | — | 21.0 |
| 23722 | Reiwa year from UTC Reiwa year from UTC | info | — | — | 21.0 |
| 23723 | RFC number shape RFC number shape | info | — | — | 21.0 |
| 23724 | RFC section number shape RFC section number shape | info | — | — | 21.0 |
| 23725 | HTTP status class 1xx-5xx HTTP status class 1xx-5xx | info | — | — | 21.0 |
| 23726 | RFC 3339 UTC stamp RFC 3339 UTC stamp | info | — | — | 21.0 |
| 23727 | RIS tag count, body discarded RIS tag count, body discarded | info | — | — | 21.0 |
| 23728 | robots.txt group count robots.txt group count | info | — | — | 21.0 |
| 23729 | ROT13 encode, input discarded ROT13 encode, input discarded | info | — | — | 21.0 |
| 23730 | sdbm hex, input discarded sdbm hex, input discarded | info | — | — | 21.0 |
| 23731 | Whether UTC second can be 60 Whether UTC second can be 60 | info | — | — | 21.0 |
| 23732 | UTC second 0-60 band UTC second 0-60 band | info | — | — | 21.0 |
| 23733 | Seconds to minutes Seconds to minutes | info | — | — | 21.0 |
| 23734 | UTC second 0-60 band UTC second 0-60 band | info | — | — | 21.0 |
| 23735 | UTC second UTC second | info | — | — | 21.0 |
| 23736 | SemVer shape SemVer shape | info | — | — | 21.0 |
| 23737 | SemVer numbers only SemVer numbers only | info | — | — | 21.0 |
| 23738 | SHA-1, input discarded SHA-1, input discarded | info | — | — | 21.0 |
| 23739 | SHA-256, input discarded SHA-256, input discarded | info | — | — | 21.0 |
| 23740 | sidereal day fraction band sidereal day fraction band | info | — | — | 21.0 |
| 23741 | Slug character check Slug character check | info | — | — | 21.0 |
| 23742 | Snowflake id shape Snowflake id shape | info | — | — | 21.0 |
| 23743 | Mean solar noon UTC-hour band Mean solar noon UTC-hour band | info | — | — | 21.0 |
| 23744 | SPDX license id shape SPDX license id shape | info | — | — | 21.0 |
| 23745 | US state AK USPS state code AK. | info | — | — | 21.0 |
| 23746 | US state AL USPS state code AL. | info | — | — | 21.0 |
| 23747 | US state AR USPS state code AR. | info | — | — | 21.0 |
| 23748 | US state AZ USPS state code AZ. | info | — | — | 21.0 |
| 23749 | US state CA USPS state code CA. | info | — | — | 21.0 |
| 23750 | US state CO USPS state code CO. | info | — | — | 21.0 |
A score measures maintenance activity, not safety. A high score does not mean a server is secure, and a low one does not mean it is dangerous — see the methodology for what each signal does and does not tell you.