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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 |
|---|---|---|---|---|---|
| 25151 | Celsius to kelvin Celsius to kelvin | info | — | — | 21.0 |
| 25152 | Fresh cache hint Fresh cache hint | info | — | — | 21.0 |
| 25153 | Cache-Control max-age shape Cache-Control max-age shape | info | — | — | 21.0 |
| 25154 | Tool catalog size Tool catalog size | info | — | — | 21.0 |
| 25155 | UTC century number UTC century number | info | — | — | 21.0 |
| 25156 | Gregorian century band Gregorian century band | info | — | — | 21.0 |
| 25157 | CIDR shape, value discarded CIDR shape, value discarded | info | — | — | 21.0 |
| 25158 | Centimeters to inches Centimeters to inches | info | — | — | 21.0 |
| 25159 | CSS hex color shape CSS hex color shape | info | — | — | 21.0 |
| 25160 | RGB tuple shape RGB tuple shape | info | — | — | 21.0 |
| 25161 | JSON Accept hint JSON Accept hint | info | — | — | 21.0 |
| 25162 | SSE Accept hint SSE Accept hint | info | — | — | 21.0 |
| 25163 | Content-Type token shape Content-Type token shape | info | — | — | 21.0 |
| 25164 | Coptic year band Coptic year band | info | — | — | 21.0 |
| 25165 | CRC16 hex, input discarded CRC16 hex, input discarded | info | — | — | 21.0 |
| 25166 | CRC32 hex, input discarded CRC32 hex, input discarded | info | — | — | 21.0 |
| 25167 | CRC8 hex, input discarded CRC8 hex, input discarded | info | — | — | 21.0 |
| 25168 | Five-field cron shape Five-field cron shape | info | — | — | 21.0 |
| 25169 | Six-field cron shape Six-field cron shape | info | — | — | 21.0 |
| 25170 | UTC cron five-field shape UTC cron five-field shape | info | — | — | 21.0 |
| 25171 | CSV row count, body discarded CSV row count, body discarded | info | — | — | 21.0 |
| 25172 | CUID shape check CUID shape check | info | — | — | 21.0 |
| 25173 | US cups to milliliters US cups to milliliters | info | — | — | 21.0 |
| 25174 | UTC day of year 1-366 UTC day of year 1-366 | info | — | — | 21.0 |
| 25175 | UTC decade start year UTC decade start year | info | — | — | 21.0 |
| 25176 | Gregorian decade band Gregorian decade band | info | — | — | 21.0 |
| 25177 | Discordian season 1-5 band Discordian season 1-5 band | info | — | — | 21.0 |
| 25178 | djb2 hex, input discarded djb2 hex, input discarded | info | — | — | 21.0 |
| 25179 | DOI Shape Check a DOI shape. | info | — | — | 21.0 |
| 25180 | Domain label split Domain label split | info | — | — | 21.0 |
| 25181 | Day-of-year 1-366 band Day-of-year 1-366 band | info | — | — | 21.0 |
| 25182 | UTC day of year UTC day of year | info | — | — | 21.0 |
| 25183 | EU DST in-force band EU DST in-force band | info | — | — | 21.0 |
| 25184 | EAN/UPC digit shape EAN/UPC digit shape | info | — | — | 21.0 |
| 25185 | Unix epoch milliseconds Unix epoch milliseconds | info | — | — | 21.0 |
| 25186 | Unix week number from seconds Unix week number from seconds | info | — | — | 21.0 |
| 25187 | ETag shape, value discarded ETag shape, value discarded | info | — | — | 21.0 |
| 25188 | ETag shape ETag shape | info | — | — | 21.0 |
| 25189 | ETag shape, value discarded ETag shape, value discarded | info | — | — | 21.0 |
| 25190 | Ethiopic year band Ethiopic year band | info | — | — | 21.0 |
| 25191 | Fahrenheit to Celsius Fahrenheit to Celsius | info | — | — | 21.0 |
| 25192 | Fathoms to meters Fathoms to meters | info | — | — | 21.0 |
| 25193 | UTC fiscal quarter 1-4 UTC fiscal quarter 1-4 | info | — | — | 21.0 |
| 25194 | FNV-1 hex, input discarded FNV-1 hex, input discarded | info | — | — | 21.0 |
| 25195 | FNV-1a hex, input discarded FNV-1a hex, input discarded | info | — | — | 21.0 |
| 25196 | FQDN shape, value discarded FQDN shape, value discarded | info | — | — | 21.0 |
| 25197 | Feet to meters Feet to meters | info | — | — | 21.0 |
| 25198 | Currency AED ISO 4217 currency AED. | info | — | — | 21.0 |
| 25199 | Currency AUD ISO 4217 currency AUD. | info | — | — | 21.0 |
| 25200 | Currency BRL ISO 4217 currency BRL. | 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.