At a glance
The Stable Diffusion XL API runs Stable Diffusion XL through Mage at POST https://api.mage.space/v1/stable_diffusion_xl/generate. A request at the default settings costs 10 Gems (about $0.01), with no subscription. Stable Diffusion XL takes no @handle mentions.
Image
Output
1
Variant
10
Gems per image, default
$0.01
About, in USD
Overview
What the Stable Diffusion XL API does
Classic Stable Diffusion XL, tuned for photoreal output. Text-to-image or from one input image, at a budget price.
Stable Diffusion XL, tuned for photoreal output, with an optional input image.
It accepts image as inputs.
Quick start
Call the Stable Diffusion XL API
Set MAGE_API_KEY, submit to /stable_diffusion_xl/generate, and poll status_url until the request completes.
cURL
STATUS_URL=$(curl --request POST 'https://api.mage.space/v1/stable_diffusion_xl/generate' \
--header "Authorization: Bearer $MAGE_API_KEY" \
--header 'Content-Type: application/json' \
--data '{
"prompt": "Editorial portrait in soft daylight, 35mm film look",
"aspect_ratio": "4:5",
"model_id": "6A35A7855770AE9820A3C931D4964C3817B6D9E3C6F9C4DABB5B3A94E5643B80"
}' | jq -r '.status_url')
# Repeat until status is "completed"; result.url is the file
curl "$STATUS_URL" --header "Authorization: Bearer $MAGE_API_KEY"Python
import os, time, requests
headers = {"Authorization": f"Bearer {os.environ['MAGE_API_KEY']}"}
request = requests.post(
"https://api.mage.space/v1/stable_diffusion_xl/generate",
headers=headers,
json={
"prompt": "Editorial portrait in soft daylight, 35mm film look",
"aspect_ratio": "4:5",
"model_id": "6A35A7855770AE9820A3C931D4964C3817B6D9E3C6F9C4DABB5B3A94E5643B80"
},
).json()
while request["status"] in ("queued", "in_progress"):
time.sleep(3)
request = requests.get(request["status_url"], headers=headers).json()
print(request["status"], request["result"] and request["result"]["url"])JavaScript
const headers = {
Authorization: `Bearer ${process.env.MAGE_API_KEY}`,
'Content-Type': 'application/json',
};
let request = await fetch('https://api.mage.space/v1/stable_diffusion_xl/generate', {
method: 'POST',
headers,
body: JSON.stringify({
"prompt": "Editorial portrait in soft daylight, 35mm film look",
"aspect_ratio": "4:5",
"model_id": "6A35A7855770AE9820A3C931D4964C3817B6D9E3C6F9C4DABB5B3A94E5643B80"
}),
}).then((response) => response.json());
while (['queued', 'in_progress'].includes(request.status)) {
await new Promise((resolve) => setTimeout(resolve, 3000));
request = await fetch(request.status_url, { headers }).then((r) => r.json());
}
console.log(request.status, request.result?.url);Models
Stable Diffusion XL model_id values
Send model_id to pick a variant. A request without one runs the default.
| model_id | Name | Default |
|---|---|---|
| 6A35A7855770AE9820A3C931D4964C3817B6D9E3C6F9C4DABB5B3A94E5643B80 | Stable Diffusion XL | Yes |
Options
Stable Diffusion XL parameters
Allowed values across all variants; a variant may offer fewer. The docs list the options per variant.
| Field | Values |
|---|---|
| aspect_ratio | 21:9, 16:9, 3:2, 5:4, 1:1, 4:5, 2:3, 9:16, 9:21 |
Inputs
Media inputs Stable Diffusion XL accepts
Send each as an https URL, a data URL, or an upload of up to 100 MB.
| Field | Role |
|---|---|
| image | The reference image. |
More image models
Other image generation APIs on Mage
Image · from 10 Gems
Z-Image API
The fastest image model on Mage
Image · from 20 Gems
Anima API
Purpose-built for anime
Image · from 35 Gems
Chroma API
Open-weights, built on Flux
Image · from 40 Gems
Flux 2 API
Long prompts and multi-reference edits
Image · from 9 Gems
GPT Image 2 API
Precise prompts and readable text
Image · from 75 Gems
Grok Image API
Grok Imagine, in three quality tiers
FAQ
Frequently asked questions
How much does the Stable Diffusion XL API cost?
A Stable Diffusion XL request at the default settings (Stable Diffusion XL) costs 10 Gems, about $0.01. Other resolutions, durations, and variants change the price; the response reports the exact charge. A generation that fails is refunded; one Mage's content policy blocks is not.
What is the Stable Diffusion XL API endpoint?
POST https://api.mage.space/v1/stable_diffusion_xl/generate with an Authorization: Bearer header carrying your Mage API key. The response includes a status_url to poll for the result.
Which Stable Diffusion XL models can I call?
6A35A7855770AE9820A3C931D4964C3817B6D9E3C6F9C4DABB5B3A94E5643B80. The default is Stable Diffusion XL.
Does Stable Diffusion XL support reference images or characters?
Stable Diffusion XL accepts image. Stable Diffusion XL takes no @handle mentions.
Can I use Stable Diffusion XL from Claude or ChatGPT?
Yes. Connect the Mage MCP server to Claude, ChatGPT, Claude Code, Grok, or Cursor and ask for Stable Diffusion XL by name. Your assistant reads its options with get_model and quotes the price before it generates.
How long are Stable Diffusion XL results kept?
Results and inputs are kept for 30 days. Download anything you want to keep to your own storage.
Start building with Mage
One account, one Gems balance, every model. Pay only for what you generate.