We track 50214 servers from the official MCP Registry. 33175 are hosted (remote); we have health-checked 32892 so far. 292 use templated URLs that need user-specific values and can't be checked. Of those checked, 18134 passed a full MCP handshake, 9260 are up but need credentials, and 5498 failed or were unreachable (last check 2026-10-25T21:15:30.641Z UTC). How we check.
| Server | Users (30 d) | Handshake | Auth | Tools | Latency | Last checked (UTC) | Category |
|---|---|---|---|---|---|---|---|
| ISO week 01-53 band io.github.sadri-dridi/iso-week-ok | 0 | Healthy | None | 31 | 936 ms | 2026-10-24T21:05:07.950Z | agents-and-memory |
| UTC ISO quarter 1-4 io.github.sadri-dridi/iso-q | 0 | Healthy | None | 31 | 972 ms | 2026-10-24T21:05:07.947Z | agents-and-memory |
| UTC ISO to unix seconds, value discarded io.github.sadri-dridi/iso-to-unix | 0 | Healthy | None | 31 | 941 ms | 2026-10-24T21:05:07.947Z | agents-and-memory |
| ISO-8601 timezone offset shape io.github.sadri-dridi/iso-offset | 0 | Healthy | None | 31 | 1000 ms | 2026-10-24T21:05:07.945Z | agents-and-memory |
| UTC Thursday of the current ISO week io.github.sadri-dridi/iso-week-thu | 0 | Healthy | None | 31 | 1030 ms | 2026-10-24T21:05:07.945Z | agents-and-memory |
| UTC ISO ordinal YYYY-DDD shape io.github.sadri-dridi/iso-ord2 | 0 | Healthy | None | 31 | 1051 ms | 2026-10-24T21:05:07.941Z | agents-and-memory |
| ISO week number io.github.sadri-dridi/iso-week | 0 | Healthy | None | 31 | 1063 ms | 2026-10-24T21:05:07.941Z | agents-and-memory |
| ISO ordinal day io.github.sadri-dridi/iso-ordinal | 0 | Healthy | None | 31 | 1158 ms | 2026-10-24T21:05:07.939Z | agents-and-memory |
| UTC ISO time only io.github.sadri-dridi/iso-time-utc | 0 | Healthy | None | 31 | 1112 ms | 2026-10-24T21:05:07.939Z | agents-and-memory |
| UTC ISO week-date io.github.sadri-dridi/iso-week-date | 0 | Healthy | None | 31 | 1134 ms | 2026-10-24T21:05:07.937Z | agents-and-memory |
| ISO weekday 1-7 band io.github.sadri-dridi/iso-wd-ok | 0 | Healthy | None | 31 | 36 ms | 2026-10-24T21:00:14.725Z | agents-and-memory |
| UTC ISO decade start year io.github.sadri-dridi/iso-decade | 0 | Healthy | None | 31 | 30 ms | 2026-10-24T21:00:14.691Z | agents-and-memory |
| ISO year-week YYYY-Www io.github.sadri-dridi/iso-yweek | 0 | Healthy | None | 31 | 19 ms | 2026-10-24T21:00:14.690Z | agents-and-memory |
| UTC ISO weekday 1-7 io.github.sadri-dridi/iso-wd | 0 | Healthy | None | 31 | 23 ms | 2026-10-24T21:00:14.657Z | agents-and-memory |
| IPFS CID charset, value discarded io.github.sadri-dridi/ipfs-cid-ok | 0 | Healthy | None | 31 | 1160 ms | 2026-10-24T21:00:14.287Z | agents-and-memory |
| ISO 8601 duration shape io.github.sadri-dridi/iso-duration | 0 | Healthy | None | 31 | 47 ms | 2026-10-24T21:00:14.250Z | agents-and-memory |
| UTC ISO ordinal date YYYY-DDD io.github.sadri-dridi/iso-ord | 0 | Healthy | None | 31 | 20 ms | 2026-10-24T21:00:14.225Z | agents-and-memory |
| UTC ISO week-year century io.github.sadri-dridi/iso-century | 0 | Healthy | None | 31 | 19 ms | 2026-10-24T21:00:14.206Z | agents-and-memory |
| IRC channel name shape, value discarded io.github.sadri-dridi/irc-ok | 0 | Healthy | None | 31 | 68 ms | 2026-10-24T21:00:14.174Z | agents-and-memory |
| Container image tag charset, name discarded io.github.sadri-dridi/image-tag-ok | 0 | Healthy | None | 31 | 69 ms | 2026-10-24T21:00:14.166Z | ai-and-media |
| IPv4 shape, address discarded io.github.sadri-dridi/ipv4-ok | 0 | Healthy | None | 31 | 52 ms | 2026-10-24T21:00:14.166Z | agents-and-memory |
| ISBN URN shape, value discarded io.github.sadri-dridi/isbn-uri | 0 | Healthy | None | 31 | 69 ms | 2026-10-24T21:00:14.166Z | agents-and-memory |
| Whether Islamic year is leap io.github.sadri-dridi/islamic-leap | 0 | Healthy | None | 31 | 59 ms | 2026-10-24T21:00:14.166Z | agents-and-memory |
| Islamic calendar month 1-12 band io.github.sadri-dridi/islamic-ok | 0 | Healthy | None | 31 | 66 ms | 2026-10-24T21:00:14.166Z | productivity |
| IPv4 or IPv6, address discarded io.github.sadri-dridi/ip-version | 0 | Healthy | None | 31 | 42 ms | 2026-10-24T21:00:14.158Z | agents-and-memory |
| ISBN digit shape io.github.sadri-dridi/isbn-shape | 0 | Healthy | None | 31 | 37 ms | 2026-10-24T21:00:14.158Z | agents-and-memory |
| ISBN-10 digit shape, value discarded io.github.sadri-dridi/isbn10-ok | 0 | Healthy | None | 31 | 48 ms | 2026-10-24T21:00:14.158Z | agents-and-memory |
| ISNI 16-digit shape, value discarded io.github.sadri-dridi/isni-ok | 0 | Healthy | None | 31 | 39 ms | 2026-10-24T21:00:14.149Z | agents-and-memory |
| Amazon Ion version marker, body discarded io.github.sadri-dridi/ion-ok | 0 | Healthy | None | 31 | 26 ms | 2026-10-24T21:00:14.140Z | agents-and-memory |
| IPv6 shape, address discarded io.github.sadri-dridi/ipv6-ok | 0 | Healthy | None | 31 | 25 ms | 2026-10-24T21:00:14.123Z | agents-and-memory |
| ISBN-13 digit shape, value discarded io.github.sadri-dridi/isbn13-ok | 0 | Healthy | None | 31 | 32 ms | 2026-10-24T21:00:13.765Z | agents-and-memory |
| IRI scheme shape, value discarded io.github.sadri-dridi/iri-ok | 0 | Healthy | None | 31 | 18 ms | 2026-10-24T21:00:13.718Z | agents-and-memory |
| Whether Indian national year is leap io.github.sadri-dridi/indian-leap | 0 | Healthy | None | 31 | 19 ms | 2026-10-24T21:00:13.706Z | agents-and-memory |
| Instagram-style shard id shape, value discarded io.github.sadri-dridi/instagram-id | 0 | Healthy | None | 31 | 27 ms | 2026-10-24T21:00:13.626Z | marketing-and-seo |
| INI section count, values discarded io.github.sadri-dridi/ini-sections | 0 | Healthy | None | 31 | 477 ms | 2026-10-24T21:00:13.584Z | agents-and-memory |
| If-Range etag-or-date shape, value discarded io.github.sadri-dridi/if-range-ok | 0 | Healthy | None | 31 | 479 ms | 2026-10-24T21:00:13.576Z | agents-and-memory |
| Inches to centimeters io.github.sadri-dridi/in-to-cm | 0 | Healthy | None | 31 | 466 ms | 2026-10-24T21:00:13.576Z | agents-and-memory |
| Indian national year band io.github.sadri-dridi/indian-ok | 0 | Healthy | None | 31 | 479 ms | 2026-10-24T21:00:13.576Z | agents-and-memory |
| info: URI namespace shape, value discarded io.github.sadri-dridi/info-uri | 0 | Healthy | None | 31 | 478 ms | 2026-10-24T21:00:13.576Z | agents-and-memory |
| inHg to kilopascals, number discarded io.github.sadri-dridi/inhg-kpa | 0 | Healthy | None | 31 | 478 ms | 2026-10-24T21:00:13.576Z | agents-and-memory |
| If-None-Match star-or-etag, value discarded io.github.sadri-dridi/if-none-ok | 0 | Healthy | None | 31 | 457 ms | 2026-10-24T21:00:13.569Z | agents-and-memory |
| Intel HEX type-00 count, input discarded io.github.sadri-dridi/ihex-ok | 0 | Healthy | None | 31 | 466 ms | 2026-10-24T21:00:13.569Z | agents-and-memory |
| IMF header unfold count, input discarded io.github.sadri-dridi/imf-ok | 0 | Healthy | None | 31 | 828 ms | 2026-10-24T21:00:13.564Z | agents-and-memory |
| INI key count, values discarded io.github.sadri-dridi/ini-keys-ok | 0 | Healthy | None | 31 | 453 ms | 2026-10-24T21:00:13.559Z | agents-and-memory |
| IGES start-section check, file discarded io.github.sadri-dridi/iges-ok | 0 | Healthy | None | 31 | 1280 ms | 2026-10-24T21:00:13.555Z | agents-and-memory |
| UTC last day of the current half-year io.github.sadri-dridi/hy-end | 0 | Healthy | None | 31 | 1562 ms | 2026-10-24T21:00:13.539Z | agents-and-memory |
| If-Unmodified-Since HTTP-date, value discarded io.github.sadri-dridi/if-unmod-ok | 0 | Healthy | None | 31 | 344 ms | 2026-10-24T21:00:13.529Z | agents-and-memory |
| Tabs vs spaces indent, text discarded io.github.sadri-dridi/indent-kind | 0 | Healthy | None | 31 | 26 ms | 2026-10-24T21:00:13.516Z | agents-and-memory |
| Python identifier charset, value discarded io.github.sadri-dridi/ident-py | 0 | Healthy | None | 31 | 19 ms | 2026-10-24T21:00:13.149Z | agents-and-memory |
| If-Match etag list count, value discarded io.github.sadri-dridi/if-match-ok | 0 | Healthy | None | 31 | 344 ms | 2026-10-24T21:00:12.596Z | agents-and-memory |
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