io.github.nftechie/transition-mcp
AI-powered multisport coaching β workouts, training plans, and performance analytics.
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Transition MCP
AI-powered coaching for runners, cyclists, swimmers, and triathletes. Get personalized workouts, training plan adaptation, performance analytics, and AI coaching β all accessible from Claude, MCP clients, or any HTTP client.
Powered by Transition
Quick Start
Try it right now β no API key needed:
curl "https://api.transition.fun/api/v1/wod?sport=run&duration=45"
For personalized features (your training plan, performance data, AI coach), you need a Transition account + API key. See Getting an API Key below.
Three Ways to Use This
1. Claude Code / OpenClaw Skill (Recommended)
The simplest option. Claude reads the skill file and calls the API directly β no binary, no MCP protocol, just HTTP. Also available on OpenClaw.
# Clone into your skills directory
git clone https://github.com/nftechie/transition-mcp.git ~/.claude/skills/transition-mcp
Set your API key:
# Add to your shell profile (~/.zshrc, ~/.bashrc, etc.)
export TRANSITION_API_KEY="tr_live_xxxxxxxxxxxxxxxxxxxxx"
Now in Claude Code, you can say things like:
- "What's my workout today?"
- "Show me my fitness trend for the last month"
- "Ask my coach if I should do intervals or rest today"
- "Generate me a 30-minute swim workout"
Claude reads SKILL.md and knows how to call every endpoint.
2. MCP Server (Claude Desktop, Cursor, etc.)
For MCP-compatible clients. The server wraps the Transition API as MCP tools and resources.
Install:
cd mcp
go build -o transition-mcp .
Configure Claude Desktop (~/Library/Application Support/Claude/claude_desktop_config.json):
{
"mcpServers": {
"transition-mcp": {
"command": "/absolute/path/to/transition-mcp",
"env": {
"TRANSITION_API_KEY": "tr_live_xxxxxxxxxxxxxxxxxxxxx"
}
}
}
}
Restart Claude Desktop. You'll see 6 tools and 3 resources available:
Tools:
| Tool | Description |
|---|---|
get_todays_workout | Today's scheduled workout |
get_week_plan | 7-day training plan |
adapt_plan | Trigger plan adaptation |
get_fitness_metrics | CTL/ATL/TSB performance data |
chat_with_coach | AI endurance coach |
generate_workout | Free Workout of the Day (no auth) |
Resources:
| Resource | Description |
|---|---|
transition://athlete/profile | Goals, experience, preferences |
transition://athlete/recent-activities | Last 14 days of workouts |
transition://athlete/performance | FTP, thresholds, PMC data |
3. Direct API
Use the API from scripts, automations, or any HTTP client. See SKILL.md for complete endpoint documentation with curl examples.
# Get this week's workouts
curl -H "X-API-Key: $TRANSITION_API_KEY" \
"https://api.transition.fun/api/v1/workouts?start=2026-02-09&end=2026-02-15"
# Ask the AI coach a question
curl -X POST -H "X-API-Key: $TRANSITION_API_KEY" \
-H "Content-Type: application/json" \
-d '{"message": "My left knee hurts after long runs. Should I adjust my plan?"}' \
"https://api.transition.fun/api/v1/coach/chat"
Getting an API Key
- Download Transition (iOS/Android)
- Create an account and complete onboarding
- Go to Settings > API Keys
- Tap Generate New Key β you'll see a key starting with
tr_live_ - Copy it immediately (it's only shown once)
Free tier includes 100 read requests/day and 3 AI requests/day. Plenty for personal use.
Rate Limits
| Tier | Read Endpoints | AI Endpoints |
|---|---|---|
| Free | 100/day | 3/day |
| Paid | 10,000/day | 100/day |
Read: workouts, metrics, profile, history | AI: coach chat, adapt, generate
Examples
See the examples/ directory for scripts:
curl-examples.shβ All endpoints with curl- More coming soon
License
MIT
