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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 |
|---|---|---|---|---|---|
| 18601 | JSON Pointer token count, path discarded JSON Pointer token count, path discarded | clean | — | — | 24.0 |
| 18602 | JSON Schema keyword count, body discarded JSON Schema keyword count, body discarded | clean | — | — | 24.0 |
| 18603 | JSON type-tag count, values discarded JSON type-tag count, values discarded | clean | — | — | 24.0 |
| 18604 | JSON5 comment/key shape, body discarded JSON5 comment/key shape, body discarded | clean | — | — | 24.0 |
| 18605 | JSONL object-line count, bodies discarded JSONL object-line count, bodies discarded | clean | — | — | 24.0 |
| 18606 | JSON-LD @type count, body discarded JSON-LD @type count, body discarded | clean | — | — | 24.0 |
| 18607 | Julian leap-year check from UTC Julian leap-year check from UTC | clean | — | — | 24.0 |
| 18608 | JWKS keys array count, body discarded JWKS keys array count, body discarded | clean | — | — | 24.0 |
| 18609 | JWT exp claim shape, token discarded JWT exp claim shape, token discarded | clean | — | — | 24.0 |
| 18610 | JWT header.payload.sig shape, value discarded JWT header.payload.sig shape, value discarded | clean | — | — | 24.0 |
| 18611 | JWT header segment shape, token discarded JWT header segment shape, token discarded | clean | — | — | 24.0 |
| 18612 | JWT header shape, payload discarded JWT header shape, payload discarded | clean | — | — | 24.0 |
| 18613 | JWT header segment shape, token discarded JWT header segment shape, token discarded | clean | — | — | 24.0 |
| 18614 | JWT three-part shape, token discarded JWT three-part shape, token discarded | clean | — | — | 24.0 |
| 18615 | Kubernetes kind token, manifest discarded Kubernetes kind token, manifest discarded | clean | — | — | 24.0 |
| 18616 | Kilocalories to kilojoules, number discarded Kilocalories to kilojoules, number discarded | clean | — | — | 24.0 |
| 18617 | kebab-case charset, value discarded kebab-case charset, value discarded | clean | — | — | 24.0 |
| 18618 | kebab-case segment count, value discarded kebab-case segment count, value discarded | clean | — | — | 24.0 |
| 18619 | kebab-case shape, text discarded kebab-case shape, text discarded | clean | — | — | 24.0 |
| 18620 | Keccak-256 hex length, input discarded Keccak-256 hex length, input discarded | clean | — | — | 24.0 |
| 18621 | Keccak-512 hex length, input discarded Keccak-512 hex length, input discarded | clean | — | — | 24.0 |
| 18622 | Keep-Alive timeout band, value discarded Keep-Alive timeout band, value discarded | clean | — | — | 24.0 |
| 18623 | Keep-Alive timeout band, value discarded Keep-Alive timeout band, value discarded | clean | — | — | 24.0 |
| 18624 | Kilohertz to megahertz, number discarded Kilohertz to megahertz, number discarded | clean | — | — | 24.0 |
| 18625 | KiB to bytes, number discarded KiB to bytes, number discarded | clean | — | — | 24.0 |
| 18626 | Kips to kilograms, number discarded Kips to kilograms, number discarded | clean | — | — | 24.0 |
| 18627 | Kilometers to miles, number discarded Kilometers to miles, number discarded | clean | — | — | 24.0 |
| 18628 | KML Placemark count, body discarded KML Placemark count, body discarded | clean | — | — | 24.0 |
| 18629 | Knots to km/h, number discarded Knots to km/h, number discarded | clean | — | — | 24.0 |
| 18630 | Knots to m/s, number discarded Knots to m/s, number discarded | clean | — | — | 24.0 |
| 18631 | KOI8-U high-bit band, bytes discarded KOI8-U high-bit band, bytes discarded | clean | — | — | 24.0 |
| 18632 | Kilopascals to bar, number discarded Kilopascals to bar, number discarded | clean | — | — | 24.0 |
| 18633 | KSI to megapascals, number discarded KSI to megapascals, number discarded | clean | — | — | 24.0 |
| 18634 | KSUID Base62 charset, value discarded KSUID Base62 charset, value discarded | clean | — | — | 24.0 |
| 18635 | KSUID 40-hex shape, value discarded KSUID 40-hex shape, value discarded | clean | — | — | 24.0 |
| 18636 | KSUID 27-char shape, value discarded KSUID 27-char shape, value discarded | clean | — | — | 24.0 |
| 18637 | KSUID payload charset, value discarded KSUID payload charset, value discarded | clean | — | — | 24.0 |
| 18638 | KSUID timestamp prefix, value discarded KSUID timestamp prefix, value discarded | clean | — | — | 24.0 |
| 18639 | label[for] count, markup discarded label[for] count, markup discarded | clean | — | — | 24.0 |
| 18640 | ARIA landmark count, markup discarded ARIA landmark count, markup discarded | clean | — | — | 24.0 |
| 18641 | Last-Modified HTTP-date shape, value discarded Last-Modified HTTP-date shape, value discarded | clean | — | — | 24.0 |
| 18642 | ISO-8859-1 byte count, text discarded ISO-8859-1 byte count, text discarded | clean | — | — | 24.0 |
| 18643 | ISO-8859-1 byte band, value discarded ISO-8859-1 byte band, value discarded | clean | — | — | 24.0 |
| 18644 | LCM of two integers, numbers discarded LCM of two integers, numbers discarded | clean | — | — | 24.0 |
| 18645 | Leagues to kilometers, number discarded Leagues to kilometers, number discarded | clean | — | — | 24.0 |
| 18646 | Whether current UTC year has Feb 29 Whether current UTC year has Feb 29 | clean | — | — | 24.0 |
| 18647 | Whether UTC day can have a leap second Whether UTC day can have a leap second | clean | — | — | 24.0 |
| 18648 | Whether the current UTC year is a leap year Whether the current UTC year is a leap year | clean | — | — | 24.0 |
| 18649 | LEEF attr count, line discarded LEEF attr count, line discarded | clean | — | — | 24.0 |
| 18650 | Less variable count, body discarded Less variable count, 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.