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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 |
|---|---|---|---|---|---|
| 18501 | Hjson comment shape, body discarded Hjson comment shape, body discarded | clean | — | — | 24.0 |
| 18502 | HKDF-SHA256 output length, input discarded HKDF-SHA256 output length, input discarded | clean | — | — | 24.0 |
| 18503 | HMAC-SHA256 hex length, input discarded HMAC-SHA256 hex length, input discarded | clean | — | — | 24.0 |
| 18504 | HMAC-SHA1 hex length, input discarded HMAC-SHA1 hex length, input discarded | clean | — | — | 24.0 |
| 18505 | HMAC-SHA256 hex length, input discarded HMAC-SHA256 hex length, input discarded | clean | — | — | 24.0 |
| 18506 | HN Front Count Count current Hacker News front-page stories. Titles discarded. | clean | — | — | 24.0 |
| 18507 | Hogsheads to liters, number discarded Hogsheads to liters, number discarded | clean | — | — | 24.0 |
| 18508 | Hostname shape, value discarded Hostname shape, value discarded | clean | — | — | 24.0 |
| 18509 | host:port shape, value discarded host:port shape, value discarded | clean | — | — | 24.0 |
| 18510 | Hostname shape, value discarded Hostname shape, value discarded | clean | — | — | 24.0 |
| 18511 | hosts file token count, line discarded hosts file token count, line discarded | clean | — | — | 24.0 |
| 18512 | Mechanical horsepower to kW, number discarded Mechanical horsepower to kW, number discarded | clean | — | — | 24.0 |
| 18513 | HQX run-length band, input discarded HQX run-length band, input discarded | clean | — | — | 24.0 |
| 18514 | HSTS max-age band, value discarded HSTS max-age band, value discarded | clean | — | — | 24.0 |
| 18515 | HTML entity count, markup discarded HTML entity count, markup discarded | clean | — | — | 24.0 |
| 18516 | HTML escape length, text discarded HTML escape length, text discarded | clean | — | — | 24.0 |
| 18517 | HTML h1 count, markup discarded HTML h1 count, markup discarded | clean | — | — | 24.0 |
| 18518 | HTML meta tag count, markup discarded HTML meta tag count, markup discarded | clean | — | — | 24.0 |
| 18519 | HTML numeric-entity count, input discarded HTML numeric-entity count, input discarded | clean | — | — | 24.0 |
| 18520 | HTML script tag count, markup discarded HTML script tag count, markup discarded | clean | — | — | 24.0 |
| 18521 | HTML tag count, markup discarded HTML tag count, markup discarded | clean | — | — | 24.0 |
| 18522 | html lang attribute shape, markup discarded html lang attribute shape, markup discarded | clean | — | — | 24.0 |
| 18523 | HTTP reason-phrase catalog size HTTP reason-phrase catalog size | clean | — | — | 24.0 |
| 18524 | HTTP Status Short catalog of common HTTP status codes. | clean | — | — | 24.0 |
| 18525 | UTC last day of the current half-year UTC last day of the current half-year | clean | — | — | 24.0 |
| 18526 | Hydra operation count, body discarded Hydra operation count, body discarded | clean | — | — | 24.0 |
| 18527 | HZ-GB ~{ ~} frame, input discarded HZ-GB ~{ ~} frame, input discarded | clean | — | — | 24.0 |
| 18528 | Hertz to kilohertz, number discarded Hertz to kilohertz, number discarded | clean | — | — | 24.0 |
| 18529 | HZ ~{ ~} frame count, input discarded HZ ~{ ~} frame count, input discarded | clean | — | — | 24.0 |
| 18530 | HZ-GB ~{ shift count, input discarded HZ-GB ~{ shift count, input discarded | clean | — | — | 24.0 |
| 18531 | IANA Zones Common IANA timezone names for clock calls. | clean | — | — | 24.0 |
| 18532 | IBAN length/charset, value discarded IBAN length/charset, value discarded | clean | — | — | 24.0 |
| 18533 | iCalendar shape, body discarded iCalendar shape, body discarded | clean | — | — | 24.0 |
| 18534 | ICO magic-byte check, file discarded ICO magic-byte check, file discarded | clean | — | — | 24.0 |
| 18535 | ICO magic-byte check, file discarded ICO magic-byte check, file discarded | clean | — | — | 24.0 |
| 18536 | iCalendar VEVENT count, body discarded iCalendar VEVENT count, body discarded | clean | — | — | 24.0 |
| 18537 | JS identifier charset, value discarded JS identifier charset, value discarded | clean | — | — | 24.0 |
| 18538 | programming identifier charset, value discarded programming identifier charset, value discarded | clean | — | — | 24.0 |
| 18539 | Python identifier charset, value discarded Python identifier charset, value discarded | clean | — | — | 24.0 |
| 18540 | MSSQL IDENTITY integer band, value discarded MSSQL IDENTITY integer band, value discarded | clean | — | — | 24.0 |
| 18541 | IDNA label charset, host discarded IDNA label charset, host discarded | clean | — | — | 24.0 |
| 18542 | IDNA label length band, host discarded IDNA label length band, host discarded | clean | — | — | 24.0 |
| 18543 | If-Match etag list count, value discarded If-Match etag list count, value discarded | clean | — | — | 24.0 |
| 18544 | If-Modified-Since HTTP-date, value discarded If-Modified-Since HTTP-date, value discarded | clean | — | — | 24.0 |
| 18545 | If-None-Match star-or-etag, value discarded If-None-Match star-or-etag, value discarded | clean | — | — | 24.0 |
| 18546 | If-Range etag-or-date shape, value discarded If-Range etag-or-date shape, value discarded | clean | — | — | 24.0 |
| 18547 | If-Unmodified-Since HTTP-date, value discarded If-Unmodified-Since HTTP-date, value discarded | clean | — | — | 24.0 |
| 18548 | IGES start-section check, file discarded IGES start-section check, file discarded | clean | — | — | 24.0 |
| 18549 | Intel HEX type-00 count, input discarded Intel HEX type-00 count, input discarded | clean | — | — | 24.0 |
| 18550 | Container image tag charset, name discarded Container image tag charset, name discarded | clean | — | — | 24.0 |
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.