We track 46365 servers from the official MCP Registry. 30096 are hosted (remote); we have health-checked 29827 so far. 273 use templated URLs that need user-specific values and can't be checked. Of those checked, 16490 passed a full MCP handshake, 8138 are up but need credentials, and 5199 failed or were unreachable (last check 2026-10-19T10:21:13.302Z UTC). How we check.
| Server | Users (30 d) | Handshake | Auth | Tools | Latency | Last checked (UTC) | Category |
|---|---|---|---|---|---|---|---|
| Julian Day Number integer band io.github.sadri-dridi/jdn-ok | 0 | Healthy | None | 31 | 18 ms | 2026-10-19T05:51:03.209Z | agents-and-memory |
| Japanese era year band io.github.sadri-dridi/japanese-ok | 0 | Healthy | None | 31 | 15 ms | 2026-10-19T05:51:03.207Z | agents-and-memory |
| JDN modulo 7 weekday band io.github.sadri-dridi/jdn-mod | 0 | Healthy | None | 31 | 14 ms | 2026-10-19T05:51:03.206Z | agents-and-memory |
| ISWC T- shape, value discarded io.github.sadri-dridi/iswc-ok | 0 | Healthy | None | 31 | 16 ms | 2026-10-19T05:51:03.204Z | agents-and-memory |
| TICKET-123 issue key shape, value discarded io.github.sadri-dridi/issue-key-ok | 0 | Healthy | None | 31 | 15 ms | 2026-10-19T05:51:03.195Z | agents-and-memory |
| ISSN URN shape, value discarded io.github.sadri-dridi/issn-uri | 0 | Healthy | None | 31 | 18 ms | 2026-10-19T05:51:03.158Z | agents-and-memory |
| ISO 8601 datetime shape io.github.sadri-dridi/iso8601-ok | 0 | Healthy | None | 31 | 15 ms | 2026-10-19T05:51:03.116Z | agents-and-memory |
| ISSN shape, value discarded io.github.sadri-dridi/issn-shape | 0 | Healthy | None | 31 | 14 ms | 2026-10-19T05:51:03.115Z | agents-and-memory |
| ISRC 12-char shape, value discarded io.github.sadri-dridi/isrc-ok | 0 | Healthy | None | 31 | 14 ms | 2026-10-19T05:51:03.093Z | agents-and-memory |
| Whether current UTC year has 52 ISO weeks io.github.sadri-dridi/iso-week52 | 0 | Healthy | None | 31 | 16 ms | 2026-10-19T05:51:02.787Z | agents-and-memory |
| ISO-2022 ESC sequence count, input discarded io.github.sadri-dridi/iso2022-ok | 0 | Healthy | None | 31 | 749 ms | 2026-10-19T05:51:02.709Z | agents-and-memory |
| ISO date to unix seconds, value discarded io.github.sadri-dridi/iso-unix | 0 | Healthy | None | 31 | 748 ms | 2026-10-19T05:51:02.703Z | agents-and-memory |
| UTC ISO ordinal YYYY-DDD shape io.github.sadri-dridi/iso-ord2 | 0 | Healthy | None | 31 | 665 ms | 2026-10-19T05:51:02.698Z | agents-and-memory |
| UTC ISO semester 1-2 io.github.sadri-dridi/iso-sem | 0 | Healthy | None | 31 | 1572 ms | 2026-10-19T05:51:02.698Z | agents-and-memory |
| UTC Thursday of the current ISO week io.github.sadri-dridi/iso-week-thu | 0 | Healthy | None | 31 | 677 ms | 2026-10-19T05:51:02.698Z | agents-and-memory |
| ISO 3166-1 alpha-2 shape io.github.sadri-dridi/iso3166-ok | 0 | Healthy | None | 31 | 666 ms | 2026-10-19T05:51:02.698Z | agents-and-memory |
| ISO 4217 currency shape io.github.sadri-dridi/iso4217-ok | 0 | Healthy | None | 31 | 677 ms | 2026-10-19T05:51:02.698Z | agents-and-memory |
| ISSN digit shape io.github.sadri-dridi/issn-ok | 0 | Healthy | None | 31 | 249 ms | 2026-10-19T05:51:02.698Z | agents-and-memory |
| UTC ISO week-date io.github.sadri-dridi/iso-week-date | 0 | Healthy | None | 31 | 666 ms | 2026-10-19T05:51:02.696Z | agents-and-memory |
| ISO week 01-53 band io.github.sadri-dridi/iso-week-ok | 0 | Healthy | None | 31 | 660 ms | 2026-10-19T05:51:02.696Z | agents-and-memory |
| ISO year-week YYYY-Www io.github.sadri-dridi/iso-yweek | 0 | Healthy | None | 31 | 665 ms | 2026-10-19T05:51:02.660Z | agents-and-memory |
| UTC ISO to unix seconds, value discarded io.github.sadri-dridi/iso-to-unix | 0 | Healthy | None | 31 | 1518 ms | 2026-10-19T05:51:02.647Z | agents-and-memory |
| UTC ISO week-yearing year io.github.sadri-dridi/iso-year | 0 | Healthy | None | 31 | 646 ms | 2026-10-19T05:51:02.639Z | agents-and-memory |
| UTC ISO weekday 1-7 io.github.sadri-dridi/iso-wd | 0 | Healthy | None | 31 | 647 ms | 2026-10-19T05:51:02.633Z | agents-and-memory |
| ISO weekday 1-7 band io.github.sadri-dridi/iso-wd-ok | 0 | Healthy | None | 31 | 1888 ms | 2026-10-19T05:51:02.625Z | agents-and-memory |
| UTC ISO decade start year io.github.sadri-dridi/iso-decade | 0 | Healthy | None | 31 | 1204 ms | 2026-10-19T05:51:02.586Z | agents-and-memory |
| UTC ISO ordinal date YYYY-DDD io.github.sadri-dridi/iso-ord | 0 | Healthy | None | 31 | 21 ms | 2026-10-19T05:51:01.958Z | agents-and-memory |
| UTC ISO date io.github.sadri-dridi/iso-date-utc | 0 | Healthy | None | 31 | 1562 ms | 2026-10-19T05:51:01.493Z | agents-and-memory |
| UTC ISO quarter 1-4 io.github.sadri-dridi/iso-q | 0 | Healthy | None | 31 | 425 ms | 2026-10-19T05:51:01.482Z | agents-and-memory |
| ISO ordinal day io.github.sadri-dridi/iso-ordinal | 0 | Healthy | None | 31 | 447 ms | 2026-10-19T05:51:01.477Z | agents-and-memory |
| UTC ISO week-year century io.github.sadri-dridi/iso-century | 0 | Healthy | None | 31 | 1540 ms | 2026-10-19T05:51:01.473Z | agents-and-memory |
| ISO 8601 duration shape io.github.sadri-dridi/iso-duration | 0 | Healthy | None | 31 | 1531 ms | 2026-10-19T05:51:01.467Z | agents-and-memory |
| ISO-8601 timezone offset shape io.github.sadri-dridi/iso-offset | 0 | Healthy | None | 31 | 1029 ms | 2026-10-19T05:51:01.464Z | agents-and-memory |
| ISO week number io.github.sadri-dridi/iso-week | 0 | Healthy | None | 31 | 1511 ms | 2026-10-19T05:51:01.464Z | agents-and-memory |
| Whether Islamic year is leap io.github.sadri-dridi/islamic-leap | 0 | Healthy | None | 31 | 944 ms | 2026-10-19T05:51:01.455Z | agents-and-memory |
| Islamic calendar month 1-12 band io.github.sadri-dridi/islamic-ok | 0 | Healthy | None | 31 | 947 ms | 2026-10-19T05:51:01.455Z | productivity |
| UTC ISO time only io.github.sadri-dridi/iso-time-utc | 0 | Healthy | None | 31 | 943 ms | 2026-10-19T05:51:01.455Z | agents-and-memory |
| IRC channel name shape, value discarded io.github.sadri-dridi/irc-ok | 0 | Healthy | None | 31 | 928 ms | 2026-10-19T05:51:01.450Z | agents-and-memory |
| IPv4 shape, address discarded io.github.sadri-dridi/ipv4-ok | 0 | Healthy | None | 31 | 619 ms | 2026-10-19T05:51:01.428Z | agents-and-memory |
| ISNI 16-digit shape, value discarded io.github.sadri-dridi/isni-ok | 0 | Healthy | None | 31 | 923 ms | 2026-10-19T05:51:00.861Z | agents-and-memory |
| ISBN-10 digit shape, value discarded io.github.sadri-dridi/isbn10-ok | 0 | Healthy | None | 31 | 33 ms | 2026-10-19T05:51:00.835Z | agents-and-memory |
| ISBN digit shape io.github.sadri-dridi/isbn-shape | 0 | Healthy | None | 31 | 30 ms | 2026-10-19T05:51:00.833Z | agents-and-memory |
| Amazon Ion version marker, body discarded io.github.sadri-dridi/ion-ok | 0 | Healthy | None | 31 | 16 ms | 2026-10-19T05:51:00.511Z | agents-and-memory |
| ISBN-13 digit shape, value discarded io.github.sadri-dridi/isbn13-ok | 0 | Healthy | None | 31 | 28 ms | 2026-10-19T05:50:59.929Z | agents-and-memory |
| ISBN URN shape, value discarded io.github.sadri-dridi/isbn-uri | 0 | Healthy | None | 31 | 14 ms | 2026-10-19T05:50:59.807Z | agents-and-memory |
| Whether Indian national year is leap io.github.sadri-dridi/indian-leap | 0 | Healthy | None | 31 | 1513 ms | 2026-10-19T05:50:59.620Z | agents-and-memory |
| IRI scheme shape, value discarded io.github.sadri-dridi/iri-ok | 0 | Healthy | None | 31 | 723 ms | 2026-10-19T05:50:59.426Z | agents-and-memory |
| Instagram-style shard id shape, value discarded io.github.sadri-dridi/instagram-id | 0 | Healthy | None | 31 | 1100 ms | 2026-10-19T05:50:59.422Z | marketing-and-seo |
| IPv4 or IPv6, address discarded io.github.sadri-dridi/ip-version | 0 | Healthy | None | 31 | 855 ms | 2026-10-19T05:50:59.422Z | agents-and-memory |
| IPv6 shape, address discarded io.github.sadri-dridi/ipv6-ok | 0 | Healthy | None | 31 | 827 ms | 2026-10-19T05:50:59.422Z | agents-and-memory |
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