API documentation

First list the models allowed by your key, then make a chat request.

curl https://istacks.org/api/v1/models \
  -H "Authorization: Bearer oc_..."

curl https://istacks.org/api/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer oc_..." \
  -d '{
    "model": "gpt-5",
    "messages": [
      {"role": "user", "content": "Hello"}
    ]
  }'

Note: some parameters (e.g. temperature) depend on the model.

curl https://istacks.org/api/v1/responses \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer oc_..." \
  -d '{
    "model": "gpt-5",
    "input": "Hello"
  }'

• 401 – Missing or invalid API key
• 402 – Account not funded (insufficient credits)
• 403 – Model not allowed for this key
• 429 – Too many requests (rate limit)