We track 47362 servers from the official MCP Registry. 30880 are hosted (remote); we have health-checked 30613 so far. 273 use templated URLs that need user-specific values and can't be checked. Of those checked, 16827 passed a full MCP handshake, 8433 are up but need credentials, and 5353 failed or were unreachable (last check 2026-10-20T22:31:09.212Z UTC). How we check.
| Server | Users (30 d) | Handshake | Auth | Tools | Latency | Last checked (UTC) | Category |
|---|---|---|---|---|---|---|---|
| Contrast ratio for two hex colors io.github.sadri-dridi/contrast-ok | 0 | Healthy | None | 31 | 30 ms | 2026-10-20T13:46:00.233Z | agents-and-memory |
| content-id base58 length, value discarded io.github.sadri-dridi/contentid-b58 | 0 | Healthy | None | 31 | 28 ms | 2026-10-20T13:46:00.172Z | agents-and-memory |
| Content-Type token shape io.github.sadri-dridi/content-type-ok | 0 | Healthy | None | 31 | 22 ms | 2026-10-20T13:46:00.165Z | agents-and-memory |
| composer.json name shape, body discarded io.github.sadri-dridi/composer-ok | 0 | Healthy | None | 31 | 20 ms | 2026-10-20T13:46:00.128Z | agents-and-memory |
| colon-separated token count, value discarded io.github.sadri-dridi/colon-n | 0 | Healthy | None | 31 | 44 ms | 2026-10-20T13:45:59.974Z | agents-and-memory |
| SSE Accept hint io.github.sadri-dridi/compat-sse | 0 | Healthy | None | 31 | 29 ms | 2026-10-20T13:45:59.963Z | agents-and-memory |
| RGB tuple shape io.github.sadri-dridi/color-rgb-ok | 0 | Healthy | None | 31 | 19 ms | 2026-10-20T13:45:59.954Z | agents-and-memory |
| JSON Accept hint io.github.sadri-dridi/compat-json | 0 | Healthy | None | 31 | 29 ms | 2026-10-20T13:45:59.932Z | agents-and-memory |
| CSS hex color shape io.github.sadri-dridi/color-hex-ok | 0 | Healthy | None | 31 | 58 ms | 2026-10-20T13:45:59.919Z | agents-and-memory |
| Centiliters to liters, number discarded io.github.sadri-dridi/cl-l | 0 | Healthy | None | 31 | 1195 ms | 2026-10-20T13:45:59.894Z | agents-and-memory |
| CIDv1 multibase prefix, value discarded io.github.sadri-dridi/cid-v1 | 0 | Healthy | None | 31 | 561 ms | 2026-10-20T13:45:59.880Z | agents-and-memory |
| CityHash64 hex length, input discarded io.github.sadri-dridi/city64-len | 0 | Healthy | None | 31 | 1166 ms | 2026-10-20T13:45:59.841Z | agents-and-memory |
| COMB sequential UUID layout, value discarded io.github.sadri-dridi/comb-ok | 0 | Healthy | None | 31 | 23 ms | 2026-10-20T13:45:59.771Z | agents-and-memory |
| reverse COMB UUID layout, value discarded io.github.sadri-dridi/comb-rev | 0 | Healthy | None | 31 | 18 ms | 2026-10-20T13:45:59.770Z | agents-and-memory |
| CityHash32 hex length, input discarded io.github.sadri-dridi/city32 | 0 | Healthy | None | 31 | 345 ms | 2026-10-20T13:45:59.724Z | agents-and-memory |
| Centimeters to inches io.github.sadri-dridi/cm-to-in | 0 | Healthy | None | 31 | 280 ms | 2026-10-20T13:45:59.724Z | agents-and-memory |
| Cross-Origin-Embedder-Policy token, value discarded io.github.sadri-dridi/coep-ok | 0 | Healthy | None | 31 | 47 ms | 2026-10-20T13:45:59.714Z | agents-and-memory |
| comma-separated token count, value discarded io.github.sadri-dridi/comma-n | 0 | Healthy | None | 31 | 247 ms | 2026-10-20T13:45:59.693Z | agents-and-memory |
| COBOL-CASE charset, value discarded io.github.sadri-dridi/cobol-ok | 0 | Healthy | None | 31 | 411 ms | 2026-10-20T13:45:59.663Z | agents-and-memory |
| Clamp n into [min,max], numbers discarded io.github.sadri-dridi/clamp-ok | 0 | Healthy | None | 31 | 928 ms | 2026-10-20T13:45:59.659Z | agents-and-memory |
| cmd.exe caret-escape count, input discarded io.github.sadri-dridi/cmd-esc | 0 | Healthy | None | 31 | 579 ms | 2026-10-20T13:45:59.650Z | agents-and-memory |
| CityHash hex length, input discarded io.github.sadri-dridi/cityhash-len | 0 | Healthy | None | 31 | 693 ms | 2026-10-20T13:45:59.621Z | agents-and-memory |
| IPv4 CIDR shape, value discarded io.github.sadri-dridi/cidr4-ok | 0 | Healthy | None | 31 | 680 ms | 2026-10-20T13:45:59.413Z | agents-and-memory |
| Java class CAFEBABE, bytes discarded io.github.sadri-dridi/class-ok | 0 | Healthy | None | 31 | 450 ms | 2026-10-20T13:45:59.357Z | agents-and-memory |
| CityHash128 hex length, input discarded io.github.sadri-dridi/city128 | 0 | Healthy | None | 31 | 440 ms | 2026-10-20T13:45:59.355Z | agents-and-memory |
| Centimeters to meters, number discarded io.github.sadri-dridi/cm-m | 0 | Healthy | None | 31 | 350 ms | 2026-10-20T13:45:59.177Z | agents-and-memory |
| cid: URL shape, value discarded io.github.sadri-dridi/cid-url | 0 | Healthy | None | 31 | 676 ms | 2026-10-20T13:45:59.170Z | agents-and-memory |
| Chains to meters, number discarded io.github.sadri-dridi/chain-m | 0 | Healthy | None | 31 | 329 ms | 2026-10-20T13:45:59.163Z | agents-and-memory |
| Ciceros to millimeters, number discarded io.github.sadri-dridi/cicero-mm | 0 | Healthy | None | 31 | 658 ms | 2026-10-20T13:45:59.137Z | agents-and-memory |
| CIDv0 Qm prefix, value discarded io.github.sadri-dridi/cid-v0 | 0 | Healthy | None | 31 | 639 ms | 2026-10-20T13:45:59.009Z | agents-and-memory |
| UTC century number io.github.sadri-dridi/century | 0 | Healthy | None | 31 | 34 ms | 2026-10-20T13:45:58.881Z | agents-and-memory |
| ISO country VC io.github.sadri-dridi/cc-vc | 0 | Healthy | None | 31 | 1028 ms | 2026-10-20T13:45:58.357Z | agents-and-memory |
| Cubic feet/min to m3/s, number discarded io.github.sadri-dridi/cfm-m3s | 0 | Healthy | None | 31 | 361 ms | 2026-10-20T13:45:58.127Z | agents-and-memory |
| IPv6 CIDR shape, value discarded io.github.sadri-dridi/cidr6-ok | 0 | Healthy | None | 31 | 438 ms | 2026-10-20T13:45:58.127Z | agents-and-memory |
| CIDR shape, value discarded io.github.sadri-dridi/cidr-shape | 0 | Healthy | None | 31 | 464 ms | 2026-10-20T13:45:58.126Z | agents-and-memory |
| Character count, text discarded io.github.sadri-dridi/char-count | 0 | Healthy | None | 31 | 702 ms | 2026-10-20T13:45:58.121Z | agents-and-memory |
| CIDv1 base32 prefix, value discarded io.github.sadri-dridi/cid-base32 | 0 | Healthy | None | 31 | 535 ms | 2026-10-20T13:45:58.121Z | agents-and-memory |
| CIDv0 base58btc Qm, value discarded io.github.sadri-dridi/cid-base58 | 0 | Healthy | None | 31 | 669 ms | 2026-10-20T13:45:58.121Z | agents-and-memory |
| CIDv1 raw codec prefix, value discarded io.github.sadri-dridi/cid-raw | 0 | Healthy | None | 31 | 619 ms | 2026-10-20T13:45:58.116Z | agents-and-memory |
| ISO country ZM io.github.sadri-dridi/cc-zm | 0 | Healthy | None | 31 | 625 ms | 2026-10-20T13:45:58.114Z | agents-and-memory |
| CIDv1 dag-pb codec prefix, value discarded io.github.sadri-dridi/cid-dagpb | 0 | Healthy | None | 31 | 734 ms | 2026-10-20T13:45:58.112Z | agents-and-memory |
| Gregorian century band io.github.sadri-dridi/century-n | 0 | Healthy | None | 31 | 899 ms | 2026-10-20T13:45:58.109Z | agents-and-memory |
| CF-Ray id hex shape, value discarded io.github.sadri-dridi/cf-ray | 0 | Healthy | None | 31 | 733 ms | 2026-10-20T13:45:58.106Z | agents-and-memory |
| Cubic feet/s to m3/s, number discarded io.github.sadri-dridi/cfs-m3s | 0 | Healthy | None | 31 | 942 ms | 2026-10-20T13:45:58.106Z | agents-and-memory |
| CF-IPCountry ISO2, value discarded io.github.sadri-dridi/cf-ipcountry | 0 | Healthy | None | 31 | 850 ms | 2026-10-20T13:45:58.101Z | agents-and-memory |
| CF-Visitor scheme token, value discarded io.github.sadri-dridi/cf-visitor | 0 | Healthy | None | 31 | 26 ms | 2026-10-20T13:41:04.954Z | agents-and-memory |
| ISO country ZA io.github.sadri-dridi/cc-za | 0 | Healthy | None | 31 | 17 ms | 2026-10-20T13:41:04.948Z | agents-and-memory |
| ISO country WF io.github.sadri-dridi/cc-wf | 0 | Healthy | None | 31 | 30 ms | 2026-10-20T13:41:04.928Z | agents-and-memory |
| ISO country YE io.github.sadri-dridi/cc-ye | 0 | Healthy | None | 31 | 23 ms | 2026-10-20T13:41:04.925Z | agents-and-memory |
| CF-Connecting-IP shape, value discarded io.github.sadri-dridi/cf-ip | 0 | Healthy | None | 31 | 23 ms | 2026-10-20T13:41:04.925Z | agents-and-memory |
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