Documentation Index
Fetch the complete documentation index at: /llms.txt
Use this file to discover all available pages before exploring further.
Verify your API key, model ID, and response shape with a few minimal requests.
Authorization header:
Authorization: Bearer <YOUR_API_KEY>
curl https://kaienapi.com/v1/models \\
-H "Authorization: Bearer <YOUR_API_KEY>"
id as the model name in later requests.
curl https://kaienapi.com/v1/chat/completions \\
-H "Authorization: Bearer <YOUR_API_KEY>" \\
-H "Content-Type: application/json" \\
-d '{
"model": "gpt-5.5",
"messages": [
{"role": "user", "content": "Summarize this support ticket in one sentence"}
]
}'
choices[0].message.content.
curl https://kaienapi.com/v1/images/generations \\
-H "Authorization: Bearer <YOUR_API_KEY>" \\
-H "Content-Type: application/json" \\
-d '{
"model": "gpt-image-2",
"prompt": "Create a minimal headphone product poster on a white background",
"size": "1024x1024",
"quality": "low",
"format": "jpeg",
"n": 1
}'
curl "https://kaienapi.com/v1/dashboard/billing/usage?start_date=2026-05-01&end_date=2026-05-06" \\
-H "Authorization: Bearer <YOUR_API_KEY>"