⚡ Production-ready · 8 languages · Cloudflare Edge

The Fitness API Stack
for AI Developers

3 APIs. One stack. Everything you need to build a fitness app — exercise database, NIH-verified nutrition data, and motivational content in 8 languages. Built and maintained by a WNBF champion coach.

Get Full Stack Access → Browse APIs
873
Exercises with instructions
8
Languages per API
76
NIH-verified nutrients
1600+
Motivational quotes
<50ms
Edge response time
// apis

3 APIs. Complete fitness data.

Every piece of data your fitness or wellness app needs — from exercise instructions to supplement interactions — available through clean REST endpoints.

fitlexicon
FitLexicon
873 exercises professionally translated in 8 languages — muscle groups, equipment, difficulty, step-by-step instructions included. Stop building exercise databases. Start shipping your app.
GET /exercises GET /muscles GET /equipment 873 exercises 17 muscle groups
nutrilexicon
NutriLexicon
NIH-verified vitamins, minerals, supplements and herbs. Search by benefit, tag, or name. Give your users nutrition data they can actually trust — backed by the National Institutes of Health.
GET /vitamins GET /supplements GET /herbs NIH-verified GET /benefits
wisdomlex
WisdomLex
Quotes, proverbs and affirmations from Aristotle to modern leaders — translated in 8 languages. One endpoint, instant engagement. Perfect for push notifications, onboarding screens and daily dashboards.
GET /random GET /quotes GET /categories 700+ authors
// quick start

Up in 60 seconds.

Standard REST. Add your RapidAPI key and start pulling data.

fetch-exercise.js
// Get exercises targeting biceps, in French const response = await fetch( 'https://fitlexicon.p.rapidapi.com/exercises?muscle=biceps&lang=fr&limit=10', { headers: { 'X-RapidAPI-Key': 'YOUR_KEY', 'X-RapidAPI-Host': 'fitlexicon.p.rapidapi.com' } } ); const data = await response.json(); // → { exercises: [{id, name_fr, description_fr, muscles, equipment, ...}] }
// Get a random motivational quote in French const quote = await fetch( 'https://wisdomlex.p.rapidapi.com/random?lang=fr', { headers: { 'X-RapidAPI-Key': 'YOUR_KEY', 'X-RapidAPI-Host': 'wisdomlex.p.rapidapi.com' } } ); // → { quote: "...", author: "Aristote", category: "discipline", lang: "fr" }
// pricing

Simple pricing. Start free.

Each API is available independently on RapidAPI. All plans include a free tier.

FitLexicon
Basic
Free
Pro
$9.99
Ultra ★
$29.99
Mega
$0
Browse on RapidAPI →
NutriLexicon
Basic
Free
Pro
$4.99
Ultra ★
$9.99
Mega
$19.99
Browse on RapidAPI →
WisdomLex
Basic
Free
Pro
$4.99
Ultra ★
$9.99
Mega
$19.99
Browse on RapidAPI →
Browse on RapidAPI →
Enterprise
Custom
White-label access. Custom endpoints. SLA guarantee. For apps with 10,000+ DAU or specific integration requirements.
  • Unlimited requests
  • Custom endpoints
  • Dedicated infrastructure
  • Custom data additions
  • Direct line to Jacques
Contact for pricing →
// why

Built by someone who needed it.

I built Smart Rabbit Fitness — a multilingual AI fitness platform serving users in 8 languages. These APIs are the infrastructure I extracted from that project and made available. They're production-tested, actively maintained, and used in real apps.

Jacques Chauvin · 4th World WNBF · 15+ years coaching · Creator of PRISM framework, DACO orchestration, and Smart Rabbit platform.

Read about the PRISM Framework →