> ## Documentation Index
> Fetch the complete documentation index at: https://docs.gptproto.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Doubao-Seedream-3-0-T2i-250415 - Text To Image - gptproto

> Doubao-Seedream-3-0-T2i-250415 — Text To Image (gptproto). GPTProto API reference.

BytePlus's GPTProto format for the text to image API.

<CodeGroup>
  ```bash cURL theme={null}
  curl -X POST "https://gptproto.com/v1/images/generations" \
    -H "Authorization: YOUR_API_KEY" \
    -H "Content-Type: application/json" \
    -d '{
    "model": "doubao-seedream-3-0-t2i-250415",
    "prompt": "Fisheye lens, a cat'''s head, the picture shows the cat'''s facial features are distorted due to the shooting method.",
    "response_format": "url",
    "size": "1024x1024",
    "seed": 12,
    "guidance_scale": 2.5,
    "watermark": true
  }'
  ```

  ```python Python theme={null}
  import requests
  import json

  url = "https://gptproto.com/v1/images/generations"
  headers = {
      "Authorization": "YOUR_API_KEY",
      "Content-Type": "application/json"
  }

  data = {
    "model": "doubao-seedream-3-0-t2i-250415",
    "prompt": "Fisheye lens, a cat'''s head, the picture shows the cat'''s facial features are distorted due to the shooting method.",
    "response_format": "url",
    "size": "1024x1024",
    "seed": 12,
    "guidance_scale": 2.5,
    "watermark": true
  }

  response = requests.post(url, headers=headers, json=data)
  result = response.json()
  print(json.dumps(result, indent=2))
  ```

  ```javascript JavaScript theme={null}
  const url = "https://gptproto.com/v1/images/generations";
  const headers = {
    "Authorization": "YOUR_API_KEY",
    "Content-Type": "application/json"
  };

  const data = {
    "model": "doubao-seedream-3-0-t2i-250415",
    "prompt": "Fisheye lens, a cat'''s head, the picture shows the cat'''s facial features are distorted due to the shooting method.",
    "response_format": "url",
    "size": "1024x1024",
    "seed": 12,
    "guidance_scale": 2.5,
    "watermark": true
  };

  fetch(url, {
    method: "POST",
    headers: headers,
    body: JSON.stringify(data)
  })
    .then(response => response.json())
    .then(data => console.log(data))
    .catch(error => console.error("Error:", error));
  ```

  ```go Go theme={null}
  package main

  import (
      "bytes"
      "encoding/json"
      "fmt"
      "io/ioutil"
      "net/http"
  )

  func main() {
      url := "https://gptproto.com/v1/images/generations"

      payload := []byte(`{
  "model": "doubao-seedream-3-0-t2i-250415",
  "prompt": "Fisheye lens, a cat'''s head, the picture shows the cat'''s facial features are distorted due to the shooting method.",
  "response_format": "url",
  "size": "1024x1024",
  "seed": 12,
  "guidance_scale": 2.5,
  "watermark": true
  }`)

      req, _ := http.NewRequest("POST", url, bytes.NewBuffer(payload))
      req.Header.Set("Authorization", "YOUR_API_KEY")
      req.Header.Set("Content-Type", "application/json")

      client := &http.Client{}
      resp, err := client.Do(req)
      if err != nil {
          panic(err)
      }
      defer resp.Body.Close()

      body, _ := ioutil.ReadAll(resp.Body)
      fmt.Println(string(body))
  }
  ```
</CodeGroup>

<CodeGroup>
  ```json 401 - Invalid signature theme={null}
  {
    "error": {
      "message": "Invalid signature",
      "type": "401"
    }
  }
  ```

  ```json 403 - Insufficient balance theme={null}
  {
    "error": {
      "message": "Insufficient balance",
      "type": "403"
    }
  }
  ```

  ```json 500 - Internal server error theme={null}
  {
    "error": {
      "message": "Internal server error",
      "type": "500"
    }
  }
  ```

  ```json 503 - Content policy violation theme={null}
  {
    "error": {
      "message": "Input may not meet the guidelines. Please adjust and try again.",
      "type": "503"
    }
  }
  ```
</CodeGroup>

## Parameters

| Parameter         | Type    | Required | Default                                                                                                                                               | Description                                                                                      |
| ----------------- | ------- | -------- | ----------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------ |
| `model`           | string  | ✅ Yes    | `doubao-seedream-3-0-t2i-250415`                                                                                                                      | The model to use for the request                                                                 |
| `prompt`          | string  | ✅ Yes    | `Fisheye lens, a cat&apos;&apos;&apos;s head, the picture shows the cat&apos;&apos;&apos;s facial features are distorted due to the shooting method.` | Image generation prompt describing the desired image content                                     |
| `response_format` | string  | ❌ No     | `url`                                                                                                                                                 | Response format: "url" (image URL) or "b64\_json" (base64 encoded)                               |
| `size`            | string  | ❌ No     | `1024x1024`                                                                                                                                           | Output image resolution (e.g., 1024x1024, 2K, 4K)                                                |
| `seed`            | integer | ❌ No     | `12`                                                                                                                                                  | Random seed for reproducible results                                                             |
| `guidance_scale`  | number  | ❌ No     | `2.5`                                                                                                                                                 | Controls how closely the image follows the prompt (higher = more strict, typical range: 1.0-7.0) |
| `watermark`       | boolean | ❌ No     | `true`                                                                                                                                                | Whether to add watermark to generated image                                                      |