Chat Completions

Create chat completions with streaming support via SSE.

`POST /v1/chat/completions`

Create a chat completion. Fully OpenAI-compatible — use the same request format you would with OpenAI's API.

Request

curl https://api.trytresor.com/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-oss-120b",
    "messages": [
      {"role": "user", "content": "Hello!"}
    ]
  }'

Request body

Parameter	Type	Required	Description
`model`	string	Yes	Model identifier (e.g. `gpt-oss-120b`). See Models.
`messages`	array	Yes	Array of message objects with `role` and `content`.
`stream`	boolean	No	Enable streaming via SSE. Default: `false`.
`temperature`	number	No	Sampling temperature (0–2). Default: `1`.
`max_tokens`	integer	No	Maximum tokens to generate.
`region`	string	No	Preferred inference region (e.g. `eu`). Tresor extension.

Message object

Field	Type	Description
`role`	string	One of `system`, `user`, or `assistant`.
`content`	string	The message text.

Tresor-specific headers

Header	Description
`X-Tresor-Receipt`	Set to `true` to receive a signed receipt.
`X-Tresor-Nonce`	Client nonce for replay protection (included in receipt).

Response (non-streaming)

{
  "id": "chatcmpl-abc",
  "object": "chat.completion",
  "model": "gpt-oss-120b",
  "choices": [
    {
      "index": 0,
      "message": {
        "role": "assistant",
        "content": "Hello! How can I help you?"
      },
      "finish_reason": "stop"
    }
  ],
  "usage": {
    "prompt_tokens": 9,
    "completion_tokens": 7,
    "total_tokens": 16
  }
}

Streaming response

When stream: true, the response is sent as Server-Sent Events (SSE). Each event contains a JSON chunk:

data: {"id":"chatcmpl-abc","object":"chat.completion.chunk","model":"gpt-oss-120b","choices":[{"index":0,"delta":{"content":"Hello"},"finish_reason":null}]}

data: {"id":"chatcmpl-abc","object":"chat.completion.chunk","model":"gpt-oss-120b","choices":[{"index":0,"delta":{"content":"!"},"finish_reason":null}]}

data: {"id":"chatcmpl-abc","object":"chat.completion.chunk","model":"gpt-oss-120b","choices":[{"index":0,"delta":{},"finish_reason":"stop"}]}

data: [DONE]

Authentication

Models