API reference

Responses

Use the stateless OpenAI-compatible Responses interface.

POST/v1/responsesapi.17.wtf

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Request body Example request Manage conversation state yourself Function calls & images

Request body

Parameter	Type / requirement	Description
`model`	string · required	Text model ID.
`input`	string or array	Prompt text or conversation/input items. Supply meaningful input.
`instructions`	string · optional	System instructions.
`max_output_tokens`	positive integer · optional	Defaults to 4096; max_tokens is a fallback alias.
`stream`	boolean · optional	SSE when true; defaults to false.
`temperature`, `top_p`	number · optional	Model-dependent sampling controls.
`reasoning.effort`	string · optional	Reasoning effort; reasoning_effort takes precedence.
`tools`	array · optional	Only function tools; supply type, name, description, parameters.
`tool_choice`	string or object · optional	auto, required, none, or named function.
`store`	boolean · optional	Omit or set false. true is rejected.

Example request

Read text from message items in output and their output_text content blocks. The OpenAI SDK also exposes the output_text convenience property.

curl https://api.17.wtf/v1/responses \
  -H "Authorization: Bearer $LM0_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "MODEL_ID",
  "input": "Explain what an API gateway does in one sentence.",
  "max_output_tokens": 512,
  "store": false
}'

Manage conversation state yourself

previous_response_id, background: true, and store: true return 400. There is no stored-response retrieval or deletion API here. Send the relevant conversation items in each request. Accepted metadata or formatting fields outside the documented translated parameters should not be relied on for behavior.

Function calls & images

Input items can include messages, function calls, and function_call_output entries. Send tool output with the original call_id. Message content supports text and image URLs for vision-capable models. Hosted tools such as web search and file search are not supported Responses tool types; call the dedicated tools API from your own application.