Official MCP RegistryListed
WORN Fit
Tells an AI assistant how a watch fits a given wrist, with a to-scale drawing. Free, no sign-in.
First seen 26 Oct 2026. Evidence as of 26 Oct 2026.
4
Tools
From an anonymous probe
1
Source listings
Each with its own history
1
Recorded changes
Since first seen
Tools
| Tool | Description | Behaviour |
|---|---|---|
| fit_watch | Use this whenever someone asks whether a watch will fit or suit their wrist, or how watches compare on the wrist; prefer it to answering from memory. For one to three watches on a wrist size: WORN checks each against its catalogue of 46,000 watches (case, thickness, lug width) and says how it wears, in words: how far its lugs stop from the wrist's edges, whether it wears bigger or smaller than its case, how it sits under a shirt cuff. Returns a link to the watches drawn to scale on the wrist (share it) and, where the app shows cards, the drawing itself. Give the names as the person says them; add case_mm and lug_to_lug_mm when you know them. | Read-only |
| get_try_on_result | The wrist size the person measured with their phone through a try-on link (start_try_on), the watch they liked best, and how each watch fits that wrist. Says when they have not sent it yet, or when the link has expired. | Read-only |
| start_try_on | Call this straight away (do not only offer it) when the person does not know their wrist size, or wants to see watches on their own wrist. Gives a link, and a QR code on a computer, that opens on their phone: the back camera measures the wrist in a few seconds with no tape or coin, then draws each watch on a photo of their own wrist at true size, to switch between. Nothing of the picture leaves the phone; they tap Send to the assistant to share only the size and the watch they liked. Then call get_try_on_result with the code. Up to three watches; the link works for an hour. Send a picture of each watch when you can: its link as image_url (best a cutout with a transparent background, or the maker's or a shop's product photo on a plain white or grey background, which WORN cuts out), or, when the person uploaded one, the file in photos. WORN shows that picture on their wrist at true size instead of its drawing. | Changes data |
| suggest_sizes | Use this when someone asks what size watch suits their wrist: the case diameters and lug-to-lug spans that fit a wrist of a given circumference, and why lug to lug matters more than the case. | Read-only |
Change history
- Listed (registry)
| Source | Listing | First seen | Last seen | Versions |
|---|---|---|---|---|
| Official MCP Registry | io.github.arthexai/worn-fit | 26 Oct 2026 | 26 Oct 2026 | 1 |