Upfit MCP server

• Registry namemobile.upfit/upfitverified in the MCP registry

The registry name sits under upfit.mobile. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

• Stateanswerschecked 2026-10-21
• Tools4
• Server calls itselfupfit
• Server version1.0.0
• Protocol version2025-06-18

On 2026-10-21 the server answered initialize and tools/list without a sign-in. First answer in 1053 ms.

• Its tools do none of the product's use cases we checked: count bodyweight reps through the front camera without equipment; receive spoken corrections on squat depth during a workout; log each home session and review progress over time.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

• INITE MCP score72 of 100answers 100 · does the job 0 · definitions 100 · context 100 · connects 100
• What an agent can do with it0 of 3 use cases
• Answered100% of days14 of 14 daily checks
• Median first answer983 ms
• Space in an agent's context≈ 664 tokensthe definitions of all its tools (4), which an agent carries on every turn
• Tool definitionsA · 100 of 100
• Typed results0 of 4 toolsdeclared outputSchema: results come typed, read once

• Every tool passes all six checks.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

• build_home_workout

  Use this when the user wants a bodyweight, no-equipment home workout session. Builds a 15-move session the way the Upfit iPhone app builds one: 2 warm-ups, 10 main moves balanced around the chosen level, then 3 harder finishers. Returns…

• get_exercise_form_cues

  Use this when the user asks what Upfit's coach says or checks for a specific bodyweight exercise (for example 'squat' or 'low plank hold'). Returns the app's real spoken coach lines for that exercise and, for exercises that have an Upfit…

• list_exercises

  Use this when the user wants to see which bodyweight exercises Upfit can run. Returns the enabled exercises with Upfit's own difficulty rating (1 easiest to 9 hardest) and, where Upfit documents it, how you stand to the phone (facing it…

• about_upfit

  Use this when the user asks what Upfit is, how it works, or what it cannot check. Returns a short description and links to Upfit's own explanation pages.