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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 |
|---|---|---|---|---|---|
| 17901 | Base45 charset, input discarded Base45 charset, input discarded | clean | — | — | 24.0 |
| 17902 | Base56 charset, input discarded Base56 charset, input discarded | clean | — | — | 24.0 |
| 17903 | Base58 alphabet check, input discarded Base58 alphabet check, input discarded | clean | — | — | 24.0 |
| 17904 | Base62 id charset, value discarded Base62 id charset, value discarded | clean | — | — | 24.0 |
| 17905 | Base64 encode, input discarded Base64 encode, input discarded | clean | — | — | 24.0 |
| 17906 | Base64 padding shape, input discarded Base64 padding shape, input discarded | clean | — | — | 24.0 |
| 17907 | Base64url encode, input discarded Base64url encode, input discarded | clean | — | — | 24.0 |
| 17908 | Ascii85 length, input discarded Ascii85 length, input discarded | clean | — | — | 24.0 |
| 17909 | Base91 charset, input discarded Base91 charset, input discarded | clean | — | — | 24.0 |
| 17910 | Baudot 5-bit band, input discarded Baudot 5-bit band, input discarded | clean | — | — | 24.0 |
| 17911 | BBCode tag count, body discarded BBCode tag count, body discarded | clean | — | — | 24.0 |
| 17912 | Oil barrels to liters, number discarded Oil barrels to liters, number discarded | clean | — | — | 24.0 |
| 17913 | bcrypt cost prefix check, hash discarded bcrypt cost prefix check, hash discarded | clean | — | — | 24.0 |
| 17914 | bcrypt $2 hash shape, value discarded bcrypt $2 hash shape, value discarded | clean | — | — | 24.0 |
| 17915 | bcrypt radix64 shape, input discarded bcrypt radix64 shape, input discarded | clean | — | — | 24.0 |
| 17916 | Beaufort to m/s, number discarded Beaufort to m/s, number discarded | clean | — | — | 24.0 |
| 17917 | Bech32 id hrp shape, value discarded Bech32 id hrp shape, value discarded | clean | — | — | 24.0 |
| 17918 | Bech32 charset, input discarded Bech32 charset, input discarded | clean | — | — | 24.0 |
| 17919 | Bencode integer/dict prefix, input discarded Bencode integer/dict prefix, input discarded | clean | — | — | 24.0 |
| 17920 | BER identifier octet, bytes discarded BER identifier octet, bytes discarded | clean | — | — | 24.0 |
| 17921 | Brake horsepower to kW, number discarded Brake horsepower to kW, number discarded | clean | — | — | 24.0 |
| 17922 | BIC 11-char shape, value discarded BIC 11-char shape, value discarded | clean | — | — | 24.0 |
| 17923 | BIC 8-char shape, value discarded BIC 8-char shape, value discarded | clean | — | — | 24.0 |
| 17924 | BIC/SWIFT shape, value discarded BIC/SWIFT shape, value discarded | clean | — | — | 24.0 |
| 17925 | unsigned 64-bit decimal shape, value discarded unsigned 64-bit decimal shape, value discarded | clean | — | — | 24.0 |
| 17926 | PostgreSQL bigserial band, value discarded PostgreSQL bigserial band, value discarded | clean | — | — | 24.0 |
| 17927 | pg bigserial 64-bit band, value discarded pg bigserial 64-bit band, value discarded | clean | — | — | 24.0 |
| 17928 | BIMI location URL shape, value discarded BIMI location URL shape, value discarded | clean | — | — | 24.0 |
| 17929 | BinHex colon-frame, input discarded BinHex colon-frame, input discarded | clean | — | — | 24.0 |
| 17930 | BinHex 4 colon frame, input discarded BinHex 4 colon frame, input discarded | clean | — | — | 24.0 |
| 17931 | BLAKE2s hex length, input discarded BLAKE2s hex length, input discarded | clean | — | — | 24.0 |
| 17932 | BLAKE2b hex length, input discarded BLAKE2b hex length, input discarded | clean | — | — | 24.0 |
| 17933 | BLAKE2s hex length, input discarded BLAKE2s hex length, input discarded | clean | — | — | 24.0 |
| 17934 | BLAKE3 hex length, input discarded BLAKE3 hex length, input discarded | clean | — | — | 24.0 |
| 17935 | BLAKE3 hex length, input discarded BLAKE3 hex length, input discarded | clean | — | — | 24.0 |
| 17936 | blank-line count, text discarded blank-line count, text discarded | clean | — | — | 24.0 |
| 17937 | API Blueprint group count, body discarded API Blueprint group count, body discarded | clean | — | — | 24.0 |
| 17938 | BNF production count, body discarded BNF production count, body discarded | clean | — | — | 24.0 |
| 17939 | Board feet to cubic meters, number discarded Board feet to cubic meters, number discarded | clean | — | — | 24.0 |
| 17940 | BOCU-1 signature, input discarded BOCU-1 signature, input discarded | clean | — | — | 24.0 |
| 17941 | Braille pattern count, input discarded Braille pattern count, input discarded | clean | — | — | 24.0 |
| 17942 | Browser URL Check Check whether a URL can be opened. No browser is launched. | clean | — | — | 24.0 |
| 17943 | BSB 6-digit shape, value discarded BSB 6-digit shape, value discarded | clean | — | — | 24.0 |
| 17944 | BSON document-length band, body discarded BSON document-length band, body discarded | clean | — | — | 24.0 |
| 17945 | BTU to kilojoules, number discarded BTU to kilojoules, number discarded | clean | — | — | 24.0 |
| 17946 | BTU to watt-hours, number discarded BTU to watt-hours, number discarded | clean | — | — | 24.0 |
| 17947 | Whether current UTC hour is 09-17 Whether current UTC hour is 09-17 | clean | — | — | 24.0 |
| 17948 | C string escape count, input discarded C string escape count, input discarded | clean | — | — | 24.0 |
| 17949 | Celsius to kelvin, number discarded Celsius to kelvin, number discarded | clean | — | — | 24.0 |
| 17950 | C octal-escape count, input discarded C octal-escape count, input 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.