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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 |
|---|---|---|---|---|---|
| 18551 | IMF header unfold count, input discarded IMF header unfold count, input discarded | clean | — | — | 24.0 |
| 18552 | Tabs vs spaces indent, text discarded Tabs vs spaces indent, text discarded | clean | — | — | 24.0 |
| 18553 | Whether Indian national year is leap Whether Indian national year is leap | clean | — | — | 24.0 |
| 18554 | info: URI namespace shape, value discarded info: URI namespace shape, value discarded | clean | — | — | 24.0 |
| 18555 | inHg to kilopascals, number discarded inHg to kilopascals, number discarded | clean | — | — | 24.0 |
| 18556 | INI key count, values discarded INI key count, values discarded | clean | — | — | 24.0 |
| 18557 | INI section count, body discarded INI section count, body discarded | clean | — | — | 24.0 |
| 18558 | INI section count, values discarded INI section count, values discarded | clean | — | — | 24.0 |
| 18559 | Instagram-style shard id shape, value discarded Instagram-style shard id shape, value discarded | clean | — | — | 24.0 |
| 18560 | Amazon Ion version marker, body discarded Amazon Ion version marker, body discarded | clean | — | — | 24.0 |
| 18561 | IPv4 or IPv6, address discarded IPv4 or IPv6, address discarded | clean | — | — | 24.0 |
| 18562 | IPFS CID charset, value discarded IPFS CID charset, value discarded | clean | — | — | 24.0 |
| 18563 | IRC channel name shape, value discarded IRC channel name shape, value discarded | clean | — | — | 24.0 |
| 18564 | IRI scheme shape, value discarded IRI scheme shape, value discarded | clean | — | — | 24.0 |
| 18565 | ISBN URN shape, value discarded ISBN URN shape, value discarded | clean | — | — | 24.0 |
| 18566 | ISBN-10 digit shape, value discarded ISBN-10 digit shape, value discarded | clean | — | — | 24.0 |
| 18567 | ISBN-13 digit shape, value discarded ISBN-13 digit shape, value discarded | clean | — | — | 24.0 |
| 18568 | Islamic calendar month 1-12 band Islamic calendar month 1-12 band | clean | — | — | 24.0 |
| 18569 | ISNI 16-digit shape, value discarded ISNI 16-digit shape, value discarded | clean | — | — | 24.0 |
| 18570 | ISO-8601 timezone offset shape ISO-8601 timezone offset shape | clean | — | — | 24.0 |
| 18571 | UTC ISO ordinal YYYY-DDD shape UTC ISO ordinal YYYY-DDD shape | clean | — | — | 24.0 |
| 18572 | UTC ISO to unix seconds, value discarded UTC ISO to unix seconds, value discarded | clean | — | — | 24.0 |
| 18573 | ISO date to unix seconds, value discarded ISO date to unix seconds, value discarded | clean | — | — | 24.0 |
| 18574 | UTC Thursday of the current ISO week UTC Thursday of the current ISO week | clean | — | — | 24.0 |
| 18575 | Whether current UTC year has 52 ISO weeks Whether current UTC year has 52 ISO weeks | clean | — | — | 24.0 |
| 18576 | ISO-2022 ESC sequence count, input discarded ISO-2022 ESC sequence count, input discarded | clean | — | — | 24.0 |
| 18577 | ISRC 12-char shape, value discarded ISRC 12-char shape, value discarded | clean | — | — | 24.0 |
| 18578 | ISSN URN shape, value discarded ISSN URN shape, value discarded | clean | — | — | 24.0 |
| 18579 | TICKET-123 issue key shape, value discarded TICKET-123 issue key shape, value discarded | clean | — | — | 24.0 |
| 18580 | ISWC T- shape, value discarded ISWC T- shape, value discarded | clean | — | — | 24.0 |
| 18581 | JATS article-id count, markup discarded JATS article-id count, markup discarded | clean | — | — | 24.0 |
| 18582 | Julian Day Number integer band Julian Day Number integer band | clean | — | — | 24.0 |
| 18583 | Jira Key Shape Check a Jira issue key shape. Key discarded. | clean | — | — | 24.0 |
| 18584 | JOSE compact-part count, value discarded JOSE compact-part count, value discarded | clean | — | — | 24.0 |
| 18585 | Joules to calories, number discarded Joules to calories, number discarded | clean | — | — | 24.0 |
| 18586 | journald cursor shape, value discarded journald cursor shape, value discarded | clean | — | — | 24.0 |
| 18587 | JPEG magic-byte check, file discarded JPEG magic-byte check, file discarded | clean | — | — | 24.0 |
| 18588 | JS import count, source discarded JS import count, source discarded | clean | — | — | 24.0 |
| 18589 | JS unicode-escape count, input discarded JS unicode-escape count, input discarded | clean | — | — | 24.0 |
| 18590 | JS unicode-escape count, input discarded JS unicode-escape count, input discarded | clean | — | — | 24.0 |
| 18591 | JS escape sequence count, input discarded JS escape sequence count, input discarded | clean | — | — | 24.0 |
| 18592 | JSON byte count, body discarded JSON byte count, body discarded | clean | — | — | 24.0 |
| 18593 | JSON Check Check whether text is valid JSON. The body is discarded. | clean | — | — | 24.0 |
| 18594 | JSON top-level key count, values discarded JSON top-level key count, values discarded | clean | — | — | 24.0 |
| 18595 | JSON-LD script count, markup discarded JSON-LD script count, markup discarded | clean | — | — | 24.0 |
| 18596 | JSON Lines row count, body discarded JSON Lines row count, body discarded | clean | — | — | 24.0 |
| 18597 | JSON Merge Patch key count, body discarded JSON Merge Patch key count, body discarded | clean | — | — | 24.0 |
| 18598 | JSON minify shape, body discarded JSON minify shape, body discarded | clean | — | — | 24.0 |
| 18599 | JSON Pointer shape, path discarded JSON Pointer shape, path discarded | clean | — | — | 24.0 |
| 18600 | Pretty-print JSON shape, body discarded Pretty-print JSON shape, body 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.