Stretching exercise data via API

exerciseapi.dev serves 171 stretching exercises out of 2198 total, as structured JSON over one REST API and a first-party MCP server. Each record carries muscles worked, equipment, mechanic, difficulty, and step-by-step instructions.

Flexibility and muscle lengthening

Sample stretching exercises

90/90 Hamstringbiceps femoris, semitendinosus, semimembranosus · body only · beginner
90/90 Hip Stretchiliopsoas, gluteus medius · body only · intermediate
Adductoradductor magnus, adductor longus, gracilis · foam roller · intermediate
Adductor/Groinadductor magnus, adductor longus, gracilis · intermediate
All Fours Quad Stretchrectus femoris, vastus lateralis, vastus medialis, vastus intermedius · body only · intermediate
Ankle Circlesgastrocnemius, soleus · beginner

Fetch stretching exercises

cURL

curl -H "X-API-Key: YOUR_API_KEY" \
  "https://api.exerciseapi.dev/v1/exercises?category=stretching&limit=20"

Use it from your AI coding agent

Add the MCP server to Claude Code or Cursor, then ask your agent for exercises directly. Paste the snippet into your MCP config, or paste it into the agent and ask it to install the server.

MCP config

{
  "mcpServers": {
    "exerciseapi": {
      "command": "npx",
      "args": ["-y", "@exerciseapi/mcp-server"],
      "env": {
        "EXERCISEAPI_KEY": "YOUR_API_KEY"
      }
    }
  }
}

Building a workout or fitness app? Get a free API key and start with the stretching catalog.