Add AI-powered body composition analysis to your app with a single API call. Photo-based scanning — body fat, muscle score, posture, measurements. No hardware. No SDK. Just REST.
Send a photo with basic measurements. Get detailed body composition data back as JSON in seconds.
Send a front-facing photo with height, weight, age, and gender via multipart POST request.
MediaPipe pose detection + formula ensemble + Claude Vision analyze body composition in real time.
Receive structured JSON with body fat %, muscle score, body type, posture notes, and measurements.
curl -X POST https://api.workoutxapp.com/v1/scan \
-H "X-WorkoutX-Key: YOUR_API_KEY" \
-F "photo=@front_photo.jpg" \
-F "height_cm=178" \
-F "weight_kg=75" \
-F "age=28" \
-F "gender=male"
Everything your fitness, health, or wellness app needs — without building it from scratch.
Multi-formula ensemble (Navy, Deurenberg, Gallagher) + AI vision. Typical accuracy: ±3% vs DEXA.
Lean mass estimate in kg and muscle score 1–99. Based on shoulder-waist ratio, BMI, and visual AI analysis.
Ectomorph, Mesomorph, Endomorph classification with AI confidence score — plus Ecto-Meso and Meso-Endo subtypes.
Estimated shoulder width, waist circumference, hip circumference, and waist-to-hip ratio — all from a single photo.
AI-detected postural notes — forward shoulder tilt, spinal alignment, shoulder level. Symmetry score 0–100.
Compare scans over time. Track fat change, muscle score improvement, and body composition trends per user.
Validated against DEXA scan reference data across 10,000+ subjects. Body fat estimates within ±2.1 percentage points.
Photos are never stored. Analysis runs on-edge and results are returned as JSON only. No biometric data retained post-scan.
Works on iOS, Android, and Web. Any standard camera — no depth sensor, no LiDAR, no specialized hardware required.
From indie developers to enterprise platforms — any app that cares about the body needs body data.
One-time credit packs. No subscriptions, no monthly fees. Credits never expire.
All plans include the full feature set — body fat, muscle score, posture, measurements, AI insights.
Trial
10 scans · $1.90/scan
Starter
100 scans · $1.99/scan
Growth
500 scans · $1.80/scan
Scale
1,000 scans · $1.50/scan
WorkoutX Body Scan API is the leading body composition API for developers building fitness apps, health platforms, and wellness tools. Unlike hardware body scanners that cost thousands of dollars, our photo-based body analysis API requires only a smartphone camera and returns results in under 3 seconds.
Our body fat estimation API combines three scientific formulas (US Navy Method, Deurenberg, Gallagher) with Claude AI vision for a ±3% accuracy margin — comparable to consumer-grade body fat scales. Whether you're building a weight loss app, AI coach platform, or telehealth solution, WorkoutX delivers production-ready body analytics via REST API.
As a standard REST API returning JSON, WorkoutX body composition API works with any programming language — JavaScript, Python, Swift, Kotlin, React Native, Flutter. Send a multipart POST request with a photo, receive structured JSON with body fat percentage, muscle score, body type, symmetry score, posture analysis, and estimated measurements.
Unlike static body analysis tools, WorkoutX uses a self-improving calibration system. As users submit verified measurements (DEXA, hydrostatic weighing), our formula weights automatically recalibrate — making every scan more accurate over time. This proprietary AI body metrics system is what separates WorkoutX from basic BMI API solutions.
From signup to your first body scan in under 5 minutes. No SDK, no hardware, no configuration.