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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.
54,385
servers indexed
86
with verified activity
20.0
median score
19,556
carrying risk flags
last refreshed
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Leaderboard
Activity & maintenance, not security — how this is scored| # | Server | Flags | Stars | Change | Score |
|---|---|---|---|---|---|
| 25301 | IATA airport code shape IATA airport code shape | info | — | — | 21.0 |
| 25302 | ICAO airport code shape ICAO airport code shape | info | — | — | 21.0 |
| 25303 | Inches to centimeters Inches to centimeters | info | — | — | 21.0 |
| 25304 | Indian national year band Indian national year band | info | — | — | 21.0 |
| 25305 | IPv4 shape, address discarded IPv4 shape, address discarded | info | — | — | 21.0 |
| 25306 | IPv6 shape, address discarded IPv6 shape, address discarded | info | — | — | 21.0 |
| 25307 | ISBN digit shape ISBN digit shape | info | — | — | 21.0 |
| 25308 | Whether Islamic year is leap Whether Islamic year is leap | info | — | — | 21.0 |
| 25309 | UTC ISO week-year century UTC ISO week-year century | info | — | — | 21.0 |
| 25310 | UTC ISO date UTC ISO date | info | — | — | 21.0 |
| 25311 | UTC ISO decade start year UTC ISO decade start year | info | — | — | 21.0 |
| 25312 | ISO 8601 duration shape ISO 8601 duration shape | info | — | — | 21.0 |
| 25313 | UTC ISO ordinal date YYYY-DDD UTC ISO ordinal date YYYY-DDD | info | — | — | 21.0 |
| 25314 | ISO ordinal day ISO ordinal day | info | — | — | 21.0 |
| 25315 | UTC ISO quarter 1-4 UTC ISO quarter 1-4 | info | — | — | 21.0 |
| 25316 | UTC ISO semester 1-2 UTC ISO semester 1-2 | info | — | — | 21.0 |
| 25317 | UTC ISO time only UTC ISO time only | info | — | — | 21.0 |
| 25318 | UTC ISO weekday 1-7 UTC ISO weekday 1-7 | info | — | — | 21.0 |
| 25319 | ISO weekday 1-7 band ISO weekday 1-7 band | info | — | — | 21.0 |
| 25320 | ISO week number ISO week number | info | — | — | 21.0 |
| 25321 | UTC ISO week-date UTC ISO week-date | info | — | — | 21.0 |
| 25322 | ISO week 01-53 band ISO week 01-53 band | info | — | — | 21.0 |
| 25323 | UTC ISO week-yearing year UTC ISO week-yearing year | info | — | — | 21.0 |
| 25324 | ISO year-week YYYY-Www ISO year-week YYYY-Www | info | — | — | 21.0 |
| 25325 | ISO 3166-1 alpha-2 shape ISO 3166-1 alpha-2 shape | info | — | — | 21.0 |
| 25326 | ISO 4217 currency shape ISO 4217 currency shape | info | — | — | 21.0 |
| 25327 | ISO 8601 datetime shape ISO 8601 datetime shape | info | — | — | 21.0 |
| 25328 | ISSN digit shape ISSN digit shape | info | — | — | 21.0 |
| 25329 | ISSN shape, value discarded ISSN shape, value discarded | info | — | — | 21.0 |
| 25330 | Japanese era year band Japanese era year band | info | — | — | 21.0 |
| 25331 | Julian day number band Julian day number band | info | — | — | 21.0 |
| 25332 | Julian Day integer band Julian Day integer band | info | — | — | 21.0 |
| 25333 | JDN modulo 7 weekday band JDN modulo 7 weekday band | info | — | — | 21.0 |
| 25334 | Japanese era year band Japanese era year band | info | — | — | 21.0 |
| 25335 | JSON validity JSON validity | info | — | — | 21.0 |
| 25336 | Juche year band Juche year band | info | — | — | 21.0 |
| 25337 | Juche year from UTC Juche year from UTC | info | — | — | 21.0 |
| 25338 | Julian day number Julian day number | info | — | — | 21.0 |
| 25339 | Kelvin to celsius Kelvin to celsius | info | — | — | 21.0 |
| 25340 | Kilobytes to megabytes Kilobytes to megabytes | info | — | — | 21.0 |
| 25341 | Kilograms to pounds Kilograms to pounds | info | — | — | 21.0 |
| 25342 | KiB to bytes KiB to bytes | info | — | — | 21.0 |
| 25343 | Kilometers to miles Kilometers to miles | info | — | — | 21.0 |
| 25344 | Knots to km/h Knots to km/h | info | — | — | 21.0 |
| 25345 | km/h to m/s, number discarded km/h to m/s, number discarded | info | — | — | 21.0 |
| 25346 | KSUID character length KSUID character length | info | — | — | 21.0 |
| 25347 | KSUID shape check KSUID shape check | info | — | — | 21.0 |
| 25348 | Liters to US gallons Liters to US gallons | info | — | — | 21.0 |
| 25349 | Language aa ISO 639 language tag aa. | info | — | — | 21.0 |
| 25350 | Language af ISO 639 language tag af. | 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.