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Every endpoint requires a RapidAPI key for authentication. If you have not set one up yet, head to the Quickstart first.

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Authentication

All AscendAPI endpoints are authenticated via your RapidAPI key. Pass it as a header with every request. 
X-RapidAPI-Key: YOUR_RAPIDAPI_KEY
Never expose your RapidAPI key in client-side code or public repositories. Always make API calls from your backend or a secure server environment.

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Explore with Scalar

Prefer an interactive API explorer? Each product has a dedicated Scalar docs environment where you can browse endpoints, inspect response schemas, and make live requests directly in the browser.
Scalar docs let you make live API calls directly in the browser. You will still need your RapidAPI key to authenticate requests there.

ExerciseDB V1

Interactive Scalar docs for the V1 exercise dataset. 2000+ exercises with GIF animations and structured instructions.

ExerciseDB V2

Interactive Scalar docs for the V2 exercise dataset. 11,000+ exercises with images, videos, and multilingual metadata.

Muscle Visualizer

Interactive Scalar docs for the Muscle Visualizer API. Dynamic muscle diagrams and heatmap visualizations.

Quickstart Guide

New here? The Quickstart walks you through getting your key and making your first API call in under 5 minutes.
Last modified on March 23, 2026