Provide functions in your chat request to enable structured tool use. 
curl -X POST "https://api.incredible.one/v1/chat-completion" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $INCREDIBLE_API_KEY" \
  -d '{
    "model": "small-1",
    "stream": false,
    "messages": [{"role": "user", "content": "Add 25 and 17"}],
    "functions": [{
      "name": "add_numbers",
      "description": "Add two numbers",
      "parameters": {"type":"object","properties":{"a":{"type":"number"},"b":{"type":"number"}},"required":["a","b"]}
    }]
  }'