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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 |
|---|---|---|---|---|---|
| 19351 | Microliters to liters, number discarded Microliters to liters, number discarded | clean | — | — | 24.0 |
| 19352 | Microliters to milliliters, number discarded Microliters to milliliters, number discarded | clean | — | — | 24.0 |
| 19353 | ULID charset and length, value discarded ULID charset and length, value discarded | clean | — | — | 24.0 |
| 19354 | Crockford Base32 ULID shape, value discarded Crockford Base32 ULID shape, value discarded | clean | — | — | 24.0 |
| 19355 | ULID Crockford no-hyphen, value discarded ULID Crockford no-hyphen, value discarded | clean | — | — | 24.0 |
| 19356 | ULID monotonic counter bits, value discarded ULID monotonic counter bits, value discarded | clean | — | — | 24.0 |
| 19357 | ULID millisecond prefix, value discarded ULID millisecond prefix, value discarded | clean | — | — | 24.0 |
| 19358 | ULID 26-char Crockford shape, value discarded ULID 26-char Crockford shape, value discarded | clean | — | — | 24.0 |
| 19359 | ULID 48-bit time prefix, value discarded ULID 48-bit time prefix, value discarded | clean | — | — | 24.0 |
| 19360 | Micrometers to millimeters, number discarded Micrometers to millimeters, number discarded | clean | — | — | 24.0 |
| 19361 | UML XMI packagedElement count, markup discarded UML XMI packagedElement count, markup discarded | clean | — | — | 24.0 |
| 19362 | Unicode code-point length, text discarded Unicode code-point length, text discarded | clean | — | — | 24.0 |
| 19363 | systemd unit section count, body discarded systemd unit section count, body discarded | clean | — | — | 24.0 |
| 19364 | Current UTC hour from unix seconds Current UTC hour from unix seconds | clean | — | — | 24.0 |
| 19365 | Unix seconds to ISO date, number discarded Unix seconds to ISO date, number discarded | clean | — | — | 24.0 |
| 19366 | Whether a number looks like unix milliseconds Whether a number looks like unix milliseconds | clean | — | — | 24.0 |
| 19367 | Unix seconds to UTC ISO, value discarded Unix seconds to UTC ISO, value discarded | clean | — | — | 24.0 |
| 19368 | UPC-A check-digit shape, value discarded UPC-A check-digit shape, value discarded | clean | — | — | 24.0 |
| 19369 | Upgrade protocol token, value discarded Upgrade protocol token, value discarded | clean | — | — | 24.0 |
| 19370 | UPPERCASE run count, text discarded UPPERCASE run count, text discarded | clean | — | — | 24.0 |
| 19371 | UPPERCASE charset, value discarded UPPERCASE charset, value discarded | clean | — | — | 24.0 |
| 19372 | UPPERCASE run length band, text discarded UPPERCASE run length band, text discarded | clean | — | — | 24.0 |
| 19373 | URL Normalize Return origin, host, and path. Query and fragment are dropped. | clean | — | — | 24.0 |
| 19374 | URL path length, URL discarded URL path length, URL discarded | clean | — | — | 24.0 |
| 19375 | URL path segment count, query discarded URL path segment count, query discarded | clean | — | — | 24.0 |
| 19376 | http/https scheme check, URL discarded http/https scheme check, URL discarded | clean | — | — | 24.0 |
| 19377 | URL slug charset, value discarded URL slug charset, value discarded | clean | — | — | 24.0 |
| 19378 | URL-ish token count, text discarded URL-ish token count, text discarded | clean | — | — | 24.0 |
| 19379 | URL-ish token charset, value discarded URL-ish token charset, value discarded | clean | — | — | 24.0 |
| 19380 | URN NID shape, value discarded URN NID shape, value discarded | clean | — | — | 24.0 |
| 19381 | UTC Clock Current UTC timestamp for autonomous clients. | clean | — | — | 24.0 |
| 19382 | UTF-1 signature bytes, input discarded UTF-1 signature bytes, input discarded | clean | — | — | 24.0 |
| 19383 | UTF-16 unit count, text discarded UTF-16 unit count, text discarded | clean | — | — | 24.0 |
| 19384 | UTF-16 code-unit count, text discarded UTF-16 code-unit count, text discarded | clean | — | — | 24.0 |
| 19385 | UTF-16 BOM/length band, value discarded UTF-16 BOM/length band, value discarded | clean | — | — | 24.0 |
| 19386 | UTF-16 code-unit run, text discarded UTF-16 code-unit run, text discarded | clean | — | — | 24.0 |
| 19387 | UTF-16LE BOM presence, bytes discarded UTF-16LE BOM presence, bytes discarded | clean | — | — | 24.0 |
| 19388 | UTF-32BE BOM presence, bytes discarded UTF-32BE BOM presence, bytes discarded | clean | — | — | 24.0 |
| 19389 | UTF-32LE BOM presence, bytes discarded UTF-32LE BOM presence, bytes discarded | clean | — | — | 24.0 |
| 19390 | UTF-8 byte length, text discarded UTF-8 byte length, text discarded | clean | — | — | 24.0 |
| 19391 | UTF-8 non-ASCII byte count, input discarded UTF-8 non-ASCII byte count, input discarded | clean | — | — | 24.0 |
| 19392 | UTF-8 BOM presence, bytes discarded UTF-8 BOM presence, bytes discarded | clean | — | — | 24.0 |
| 19393 | UTF-EBCDIC signature, input discarded UTF-EBCDIC signature, input discarded | clean | — | — | 24.0 |
| 19394 | Utility 1 Small public utility for autonomous clients. | clean | — | — | 24.0 |
| 19395 | Utility 2 Small public utility for autonomous clients. | clean | — | — | 24.0 |
| 19396 | Utility 3 Small public utility for autonomous clients. | clean | — | — | 24.0 |
| 19397 | Utility 4 Small public utility for autonomous clients. | clean | — | — | 24.0 |
| 19398 | Utility 5 Small public utility for autonomous clients. | clean | — | — | 24.0 |
| 19399 | Utility 6 Small public utility for autonomous clients. | clean | — | — | 24.0 |
| 19400 | Utility 7 Small public utility for autonomous clients. | 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.