Migrating from ExerciseDB to WorkoutX:
Complete Guide with Code Examples

Why Developers Are Leaving ExerciseDB

ExerciseDB has been the default exercise API recommendation since 2021 — it's mentioned in hundreds of YouTube tutorials and GitHub repos. But as apps grow, developers consistently run into the same problems:

• RapidAPI dependency: Every request routes through RapidAPI's infrastructure, adding latency and an extra failure point
• Rate limit surprises: The free tier limits (10 req/min) are hit fast in any real app
• Pricing opacity: RapidAPI pricing changes without notice, and costs scale unpredictably
• Missing data fields: No calorie burn data, no difficulty levels, no exercise mechanics — data most fitness apps actually need
• No developer portal: You manage billing through RapidAPI, not through the API provider directly

Endpoint Mapping

Here's every ExerciseDB endpoint and its WorkoutX equivalent:

WorkoutX also adds endpoints that ExerciseDB doesn't have:

• GET /v1/exercises/search — multi-filter search (target + equipment + difficulty at once)
• GET /v1/exercises/{id}/similar — find exercises similar to a given one
• GET /v1/exercises/{id}/calories?weight=80&minutes=30 — calorie burn estimate

Authentication Change

ExerciseDB requires two RapidAPI headers. WorkoutX uses a single header with your API key:

X-RapidAPI-Key: YOUR_RAPIDAPI_KEY
X-RapidAPI-Host: exercisedb.p.rapidapi.com

X-WorkoutX-Key: YOUR_WORKOUTX_KEY

Get your free WorkoutX API key at workoutxapp.com — no credit card required, 500 requests/month free.

Base URL Change

https://exercisedb.p.rapidapi.com

https://api.workoutxapp.com

JavaScript Migration

If you're using the ExerciseDB fetch pattern, here's the before/after:

const response = await fetch(
  'https://exercisedb.p.rapidapi.com/exercises/bodyPart/chest?limit=10',
  {
    headers: {
      'X-RapidAPI-Key': 'YOUR_RAPIDAPI_KEY',
      'X-RapidAPI-Host': 'exercisedb.p.rapidapi.com',
    },
  }
);
const exercises = await response.json();

const response = await fetch(
  'https://api.workoutxapp.com/v1/exercises/bodyPart/chest?limit=10',
  {
    headers: {
      'X-WorkoutX-Key': 'YOUR_WORKOUTX_KEY',
    },
  }
);
const { data: exercises } = await response.json();
// WorkoutX wraps results in { total, count, data: [...] }

Response Shape Comparison

{
  "id": "0001",
  "name": "Barbell Bench Press",
  "bodyPart": "chest",
  "target": "pectorals",
  "equipment": "barbell",
  "gifUrl": "https://v2.exercisedb.io/image/...",
  "instructions": ["Step 1...", "Step 2..."],
  "secondaryMuscles": ["triceps", "shoulders"]
}

{
  "id": "0025",
  "name": "Barbell Bench Press",
  "bodyPart": "Chest",
  "target": "Pectorals",
  "equipment": "Barbell",
  "gifUrl": "https://api.workoutxapp.com/v1/gifs/0025.gif",
  "instructions": ["Step 1...", "Step 2..."],
  "secondaryMuscles": ["Triceps", "Shoulders"],

  // Extra fields ExerciseDB doesn't have:
  "difficulty": "intermediate",
  "category": "strength",
  "mechanic": "compound",
  "force": "push",
  "met": 6,
  "caloriesPerMinute": 7.3,
  "description": "Full exercise description..."
}

Python Migration

import requests

url = "https://exercisedb.p.rapidapi.com/exercises/bodyPart/chest"
headers = {
    "X-RapidAPI-Key": "YOUR_RAPIDAPI_KEY",
    "X-RapidAPI-Host": "exercisedb.p.rapidapi.com"
}
response = requests.get(url, headers=headers, params={"limit": 10})
exercises = response.json()  # bare list

import requests

url = "https://api.workoutxapp.com/v1/exercises/bodyPart/Chest"
headers = {
    "X-WorkoutX-Key": "YOUR_WORKOUTX_KEY"
}
response = requests.get(url, headers=headers, params={"limit": 10})
result = response.json()
exercises = result["data"]  # { total, count, data: [...] }

GIF URLs

ExerciseDB GIFs are hosted on their CDN. WorkoutX GIFs are served directly from your API endpoint — same key auth, same rate limits apply.

The gifUrl field in each exercise response already points to the correct WorkoutX URL. No extra config needed — just use the gifUrl field directly in your <img> tags with your API key in the request header if you fetch them server-side, or use the URL directly in browser (GIFs are publicly accessible via signed CDN URLs).

Field Casing Difference

One small difference: ExerciseDB returns field values in lowercase ("chest", "barbell"). WorkoutX returns them in Title Case ("Chest", "Barbell"). Update any string comparisons in your UI:

if (exercise.bodyPart === 'chest') { ... }
if (exercise.equipment === 'barbell') { ... }

if (exercise.bodyPart === 'Chest') { ... }
// OR use case-insensitive comparison to be safe:
if (exercise.bodyPart.toLowerCase() === 'chest') { ... }

Migration Checklist

• ✅ Sign up at workoutxapp.com and copy your API key
• ✅ Replace base URL: exercisedb.p.rapidapi.com → api.workoutxapp.com
• ✅ Replace headers: two RapidAPI headers → one X-WorkoutX-Key header
• ✅ Add /v1/ prefix to all endpoint paths
• ✅ Update response parsing: bare array → response.data
• ✅ Update string comparisons: lowercase → Title Case field values
• ✅ (Optional) Use new fields: difficulty, caloriesPerMinute, mechanic
• ✅ Remove RapidAPI account dependency

Pricing Comparison

Monthly Requests	WorkoutX	ExerciseDB (RapidAPI)
Up to 500	Free	Free (10 req/min cap)
Up to 3,000	$9.99/mo	~$10–15/mo (varies)
Up to 10,000	$15.99/mo	~$25–35/mo
Up to 35,000	$24.99/mo	~$50+/mo