🖼️Stable Diffusion XL

Stable Diffusion XL Models

List Models

GET /sdxl/list

List all currently available Stable Diffusion XL models

Headers

Name	Value
Content-Type	application/json

Response

200

["SDXL_base", "DreamShaperXL_1.0", ...]

400

{
  "error": "Invalid request"
}

List Samplers

GET /sdxl/sampler

List available samplers

Headers

Name	Value
Content-Type	application/json

Response

200

["Euler", "Euler a", "LMS", ...]

400

{
  "error": "Invalid request"
}

List Loras

GET /sdxl/lora

List available Loras You can use loras in your prompt with <lora:Name:weight>

Headers

Name	Value
Content-Type	application/json

Response

200

[
  "3lectronics_v10",
  "blu3print_v10",
  "c0nst3llation_v10",
  "cyborg_style_xl-v10",
  ...
]

400

{
  "error": "Invalid request"
}

List Embeddings

GET /sdxl/embeddings

List available Embeddings

Headers

Name	Value
Content-Type	application/json

Response

200

[
  "FastNegativeV2",
  "easynegative"
]

400

{
  "error": "Invalid request"
}

Create Image

POST /sdxl/:model

Send image prompt to Stable Diffusion XL

Headers

Name	Value
Content-Type	application/json
Authorization	Bearer <token>

Body

Name	Type	Description	Default
prompt	string	Image Prompt	none
negative_prompt	string	Negative prompt	custom
steps	number	Diffusion steps	20
cfg_scale	number	Prompt following	7
sampler	string	Diffusion sampler	DPM++ 2M Karras

Response

200

{
  "data": "d2VsbF9oZWxsb190aGVyZV90Lm1lL3N5bmFwc2VfbGFicw....."
}

400

{
  "error": "Invalid request"
}

500

{
  "error": "Error during generation (SD)"
}

Example

example.js

const res = await fetch('https://synapselabs.onrender.com/sdxl/SDXL_base', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'Authorization': 'Bearer <your_api_key>'
  },
  body: JSON.stringify({
    prompt: 'A cat',
    steps: 20,
    cfg_scale: 7,
    sampler: 'DPM++ 2M Karras',
  }),
});

const data = await res.json();
const buf = Buffer.from(data.data, 'base64');
fs.writeFileSync('test.png', buf);