API Reference

The Last Set Mindset API gives you programmatic access to 15 years of CrossFit Open workouts, an intelligent scaling engine, and AI-powered workout generation — all in one clean REST API.

Overview

The API is designed around three core capabilities:

Workout Library — Query, filter, and retrieve all CrossFit Open workouts from 2011 to present. Filter by year, scoring type, movements, time domain, and more.

Scaling Engine — Instantly scale any workout to beginner, scaled, Rx, or Rx+ intensity for men or women. Returns movement substitutions and adjusted weights.

AI Generator — Describe a workout in plain English and receive a complete, Open-inspired workout with Rx/scaled weights, coaching notes, and programming context.

Authentication

All API requests require an API key passed via the X-API-Key header.

X-API-Key: lsm_your_api_key_here

To get an API key, contact us. A demo key is available for testing with a 50 request/month limit.

Base URL

https://api.lastsetmindset.com/v1

Response Format

All responses are JSON and follow this envelope format:

{
  "data": { ... },       // The response payload
  "meta": {
    "usage": 42,         // Calls used this month
    "limit": 500,        // Monthly call limit
    "remaining": 458     // Remaining calls
  }
}

List Workouts

GET /v1/workouts Returns a filtered list of Open workouts

Query Parameters

Param	Type	Description
year	integer	Filter by year (2011–2026) optional
type	string	`amrap` `for_time` `max_weight` optional
max_time	integer	Max time cap in minutes optional
min_time	integer	Min time cap in minutes optional
movement	string	Must include movement (repeatable) optional
exclude	string	Must exclude movement (repeatable) optional
keyword	string	Keyword search in description optional
limit	integer	Max results (default 50, max 100) optional

Example Request

curl https://api.lastsetmindset.com/v1/workouts?type=amrap&max_time=12&movement=thruster \
  -H "X-API-Key: lsm_your_key"

Get Workout

GET /v1/workouts/:workout_number Returns a single workout by number

curl https://api.lastsetmindset.com/v1/workouts/24.3 \
  -H "X-API-Key: lsm_your_key"

Scale Workout

GET /v1/workouts/:workout_number/scale Returns a scaled version of a workout

Param	Type	Description
level	string	`beginner` `scaled` `rx` `rx+` — default: `scaled` optional
gender	string	`men` `women` — default: `men` optional

Example Response

{
  "data": {
    "workout": { "workout_number": "24.3", "description": "...", ... },
    "scaled": {
      "level": "scaled",
      "rep_percent": 80,
      "movement_substitutions": {
        "bar muscle-up": "chest-to-bar pull-up",
        "overhead squat": "front squat"
      },
      "weights": {
        "weights": "70 lb"
      }
    }
  }
}

Random Workout

GET /v1/workouts/random Returns a random workout, with optional filters

Accepts the same type, max_time, movement, and exclude params as the list endpoint.

curl "https://api.lastsetmindset.com/v1/workouts/random?type=for_time&exclude=muscle-up" \
  -H "X-API-Key: lsm_your_key"

Generate Workout (AI)

POST /v1/generate Generate an original workout using AI

Describe a workout in plain English. The AI generates a complete, Open-inspired workout including Rx/scaled weights for men and women, coaching notes, and programming context.

Body Field	Type	Description
prompt	string	Plain English workout description required

Example Request

curl -X POST https://api.lastsetmindset.com/v1/generate \
  -H "X-API-Key: lsm_your_key" \
  -H "Content-Type: application/json" \
  -d '{"prompt": "A 12-minute AMRAP with dumbbell snatches and box jumps, moderate intensity"}'

Example Response

{
  "data": {
    "workout": {
      "name": "Box Snatch",
      "description": "Complete as many rounds and reps as possible in 12 minutes of:\n12 Dumbbell snatches (50/35 lb)\n9 Box jump overs (24/20 in)\n6 Burpees",
      "scoring_type": "amrap",
      "time_cap": 12,
      "movements": ["dumbbell snatch", "box jump over", "burpee"],
      "rx_men": {"db": "50 lb", "box": "24 in"},
      "rx_women": {"db": "35 lb", "box": "20 in"},
      "scaled_men": {"db": "35 lb", "box": "20 in"},
      "scaled_women": {"db": "20 lb", "box": "20 in"},
      "coaching_notes": "Break the snatches early. Aim for unbroken box jump overs.",
      "open_inspiration": "Inspired by 17.1 and 22.1 — dumbbell-heavy with monostructural cardio"
    }
  }
}

Scale Custom Workout

POST /v1/scale Scale any workout object, including AI-generated ones

Body Field	Type	Description
workout	object	Workout object with movements and rx_men/rx_women required
level	string	`beginner` `scaled` `rx` `rx+` optional
gender	string	`men` `women` optional

Usage Stats

GET /v1/usage Returns call usage for your API key

{
  "data": {
    "total_calls": 142,
    "this_month": 42,
    "limit": 500,
    "remaining": 458,
    "by_endpoint": [
      {"endpoint": "/v1/generate", "calls": 28},
      {"endpoint": "/v1/workouts", "calls": 14}
    ]
  }
}

Workout Object

Field	Type	Description
workout_number	string	e.g. `"24.3"`, `"19.1"`
year	integer	Year of the Open
name	string\|null	Workout name if it has one
description	string	Full whiteboard-style description
scoring_type	string	`amrap` `for_time` `max_weight`
time_cap	integer\|null	Time cap in minutes
movements	array	List of movement names
rx_men	object	Rx weights/heights for men
rx_women	object	Rx weights/heights for women
scaled_men	object	Standard scaled weights for men
scaled_women	object	Standard scaled weights for women
notes	string\|null	Additional notes

Scale Levels

Level	Weight	Volume	Movements
`beginner`	50% of Rx	60% of Rx	2 steps easier
`scaled`	75% of Rx	80% of Rx	1 step easier
`rx`	100%	100%	As prescribed
`rx+`	120% of Rx	110% of Rx	1 step harder

Pricing

Starter

$49/month

500 API calls/month

Full workout library access

Scaling engine

AI workout generation

Email support

Studio ★

$149/month

5,000 API calls/month

Everything in Starter

Priority support

SLA guarantee

Usage dashboard

Enterprise

Custom

Unlimited calls

Everything in Studio

Custom integrations

Dedicated support

White-label options

All plans include a 14-day free trial. Contact us to get started.