We track 49324 servers from the official MCP Registry. 32464 are hosted (remote); we have health-checked 32186 so far. 287 use templated URLs that need user-specific values and can't be checked. Of those checked, 17662 passed a full MCP handshake, 8995 are up but need credentials, and 5529 failed or were unreachable (last check 2026-10-24T04:45:16.763Z UTC). How we check.
| Server | Users (30 d) | Handshake | Auth | Tools | Latency | Last checked (UTC) | Category |
|---|---|---|---|---|---|---|---|
| JPEG magic-byte check, file discarded io.github.sadri-dridi/jpeg-magic | 0 | Healthy | None | 31 | 2261 ms | 2026-10-23T10:05:11.214Z | agents-and-memory |
| TICKET-123 issue key shape, value discarded io.github.sadri-dridi/issue-key-ok | 0 | Healthy | None | 31 | 2373 ms | 2026-10-23T10:05:11.209Z | agents-and-memory |
| JDN modulo 7 weekday band io.github.sadri-dridi/jdn-mod | 0 | Healthy | None | 31 | 26 ms | 2026-10-23T10:00:22.062Z | agents-and-memory |
| ISO-2022 ESC sequence count, input discarded io.github.sadri-dridi/iso2022-ok | 0 | Healthy | None | 31 | 28 ms | 2026-10-23T10:00:22.005Z | agents-and-memory |
| UTC ISO week-yearing year io.github.sadri-dridi/iso-year | 0 | Healthy | None | 31 | 2334 ms | 2026-10-23T10:00:21.778Z | agents-and-memory |
| ISRC 12-char shape, value discarded io.github.sadri-dridi/isrc-ok | 0 | Healthy | None | 31 | 505 ms | 2026-10-23T10:00:21.522Z | agents-and-memory |
| ISSN shape, value discarded io.github.sadri-dridi/issn-shape | 0 | Healthy | None | 31 | 197 ms | 2026-10-23T10:00:21.522Z | agents-and-memory |
| ISSN URN shape, value discarded io.github.sadri-dridi/issn-uri | 0 | Healthy | None | 31 | 138 ms | 2026-10-23T10:00:21.522Z | agents-and-memory |
| ISSN digit shape io.github.sadri-dridi/issn-ok | 0 | Healthy | None | 31 | 135 ms | 2026-10-23T10:00:21.520Z | agents-and-memory |
| UTC ISO semester 1-2 io.github.sadri-dridi/iso-sem | 0 | Healthy | None | 31 | 154 ms | 2026-10-23T10:00:21.516Z | agents-and-memory |
| ISO 8601 datetime shape io.github.sadri-dridi/iso8601-ok | 0 | Healthy | None | 31 | 454 ms | 2026-10-23T10:00:21.516Z | agents-and-memory |
| UTC ISO date io.github.sadri-dridi/iso-date-utc | 0 | Healthy | None | 31 | 2006 ms | 2026-10-23T10:00:21.510Z | agents-and-memory |
| ISO 3166-1 alpha-2 shape io.github.sadri-dridi/iso3166-ok | 0 | Healthy | None | 31 | 985 ms | 2026-10-23T10:00:21.510Z | agents-and-memory |
| ISO date to unix seconds, value discarded io.github.sadri-dridi/iso-unix | 0 | Healthy | None | 31 | 1007 ms | 2026-10-23T10:00:21.502Z | agents-and-memory |
| Whether current UTC year has 52 ISO weeks io.github.sadri-dridi/iso-week52 | 0 | Healthy | None | 31 | 884 ms | 2026-10-23T10:00:21.502Z | agents-and-memory |
| ISO 4217 currency shape io.github.sadri-dridi/iso4217-ok | 0 | Healthy | None | 31 | 903 ms | 2026-10-23T10:00:21.502Z | agents-and-memory |
| UTC ISO quarter 1-4 io.github.sadri-dridi/iso-q | 0 | Healthy | None | 31 | 790 ms | 2026-10-23T10:00:21.476Z | agents-and-memory |
| UTC ISO to unix seconds, value discarded io.github.sadri-dridi/iso-to-unix | 0 | Healthy | None | 31 | 1435 ms | 2026-10-23T10:00:21.476Z | agents-and-memory |
| ISO week 01-53 band io.github.sadri-dridi/iso-week-ok | 0 | Healthy | None | 31 | 785 ms | 2026-10-23T10:00:21.476Z | agents-and-memory |
| ISO-8601 timezone offset shape io.github.sadri-dridi/iso-offset | 0 | Healthy | None | 31 | 85 ms | 2026-10-23T10:00:21.451Z | agents-and-memory |
| UTC Thursday of the current ISO week io.github.sadri-dridi/iso-week-thu | 0 | Healthy | None | 31 | 796 ms | 2026-10-23T10:00:20.824Z | agents-and-memory |
| UTC ISO ordinal YYYY-DDD shape io.github.sadri-dridi/iso-ord2 | 0 | Healthy | None | 31 | 810 ms | 2026-10-23T10:00:20.815Z | agents-and-memory |
| UTC ISO time only io.github.sadri-dridi/iso-time-utc | 0 | Healthy | None | 31 | 845 ms | 2026-10-23T10:00:20.809Z | agents-and-memory |
| ISO week number io.github.sadri-dridi/iso-week | 0 | Healthy | None | 31 | 834 ms | 2026-10-23T10:00:20.809Z | agents-and-memory |
| UTC ISO week-date io.github.sadri-dridi/iso-week-date | 0 | Healthy | None | 31 | 782 ms | 2026-10-23T10:00:20.803Z | agents-and-memory |
| ISO ordinal day io.github.sadri-dridi/iso-ordinal | 0 | Healthy | None | 31 | 791 ms | 2026-10-23T10:00:20.786Z | agents-and-memory |
| ISO weekday 1-7 band io.github.sadri-dridi/iso-wd-ok | 0 | Healthy | None | 31 | 833 ms | 2026-10-23T10:00:20.317Z | agents-and-memory |
| UTC ISO decade start year io.github.sadri-dridi/iso-decade | 0 | Healthy | None | 31 | 782 ms | 2026-10-23T10:00:20.309Z | agents-and-memory |
| ISO year-week YYYY-Www io.github.sadri-dridi/iso-yweek | 0 | Healthy | None | 31 | 803 ms | 2026-10-23T10:00:20.298Z | agents-and-memory |
| UTC ISO weekday 1-7 io.github.sadri-dridi/iso-wd | 0 | Healthy | None | 31 | 96 ms | 2026-10-23T10:00:20.245Z | agents-and-memory |
| ISO 8601 duration shape io.github.sadri-dridi/iso-duration | 0 | Healthy | None | 31 | 64 ms | 2026-10-23T10:00:18.921Z | agents-and-memory |
| IRC channel name shape, value discarded io.github.sadri-dridi/irc-ok | 0 | Healthy | None | 31 | 81 ms | 2026-10-23T10:00:18.916Z | agents-and-memory |
| Islamic calendar month 1-12 band io.github.sadri-dridi/islamic-ok | 0 | Healthy | None | 31 | 70 ms | 2026-10-23T10:00:18.916Z | productivity |
| UTC ISO week-year century io.github.sadri-dridi/iso-century | 0 | Healthy | None | 31 | 68 ms | 2026-10-23T10:00:18.916Z | agents-and-memory |
| UTC ISO ordinal date YYYY-DDD io.github.sadri-dridi/iso-ord | 0 | Healthy | None | 31 | 71 ms | 2026-10-23T10:00:18.916Z | agents-and-memory |
| Container image tag charset, name discarded io.github.sadri-dridi/image-tag-ok | 0 | Healthy | None | 31 | 61 ms | 2026-10-23T10:00:18.903Z | ai-and-media |
| IPv4 shape, address discarded io.github.sadri-dridi/ipv4-ok | 0 | Healthy | None | 31 | 64 ms | 2026-10-23T10:00:18.903Z | agents-and-memory |
| Whether Islamic year is leap io.github.sadri-dridi/islamic-leap | 0 | Healthy | None | 31 | 67 ms | 2026-10-23T10:00:18.903Z | agents-and-memory |
| IPv4 or IPv6, address discarded io.github.sadri-dridi/ip-version | 0 | Healthy | None | 31 | 53 ms | 2026-10-23T10:00:18.898Z | agents-and-memory |
| ISBN URN shape, value discarded io.github.sadri-dridi/isbn-uri | 0 | Healthy | None | 31 | 59 ms | 2026-10-23T10:00:18.898Z | agents-and-memory |
| ISBN-10 digit shape, value discarded io.github.sadri-dridi/isbn10-ok | 0 | Healthy | None | 31 | 60 ms | 2026-10-23T10:00:18.898Z | agents-and-memory |
| Amazon Ion version marker, body discarded io.github.sadri-dridi/ion-ok | 0 | Healthy | None | 31 | 216 ms | 2026-10-23T10:00:18.893Z | agents-and-memory |
| ISBN digit shape io.github.sadri-dridi/isbn-shape | 0 | Healthy | None | 31 | 51 ms | 2026-10-23T10:00:18.893Z | agents-and-memory |
| ISNI 16-digit shape, value discarded io.github.sadri-dridi/isni-ok | 0 | Healthy | None | 31 | 50 ms | 2026-10-23T10:00:18.893Z | agents-and-memory |
| IPv6 shape, address discarded io.github.sadri-dridi/ipv6-ok | 0 | Healthy | None | 31 | 59 ms | 2026-10-23T10:00:18.889Z | agents-and-memory |
| ISBN-13 digit shape, value discarded io.github.sadri-dridi/isbn13-ok | 0 | Healthy | None | 31 | 49 ms | 2026-10-23T10:00:18.884Z | agents-and-memory |
| IRI scheme shape, value discarded io.github.sadri-dridi/iri-ok | 0 | Healthy | None | 31 | 22 ms | 2026-10-23T10:00:18.377Z | agents-and-memory |
| Whether Indian national year is leap io.github.sadri-dridi/indian-leap | 0 | Healthy | None | 31 | 25 ms | 2026-10-23T10:00:18.321Z | agents-and-memory |
| Instagram-style shard id shape, value discarded io.github.sadri-dridi/instagram-id | 0 | Healthy | None | 31 | 36 ms | 2026-10-23T10:00:18.180Z | marketing-and-seo |
| info: URI namespace shape, value discarded io.github.sadri-dridi/info-uri | 0 | Healthy | None | 31 | 497 ms | 2026-10-23T10:00:18.168Z | agents-and-memory |
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