SDXL API usage

For general tips on SDXL training and inference, see SDXL training

Unlike SD15 checkpoint training, SDXL on Astria is trained as a LoRA+text-embedding. As such, inference is taking place a on a base line model such as SDXL 1.0 and prompt.text should specify the loaded lora such as <lora:123456:0.83> - will load lora with id=123456 and strength=0.83

See LoRA docs on lora syntax

With SDXL you cannot combine multiple LoRAs.

Use any SDXL model from the gallery to do inference.

POST /tunes/:id/prompts

cURL

# Note the hard-coded 666678 which is the tune_id of SDXL 1.0 from the gallery
curl -X POST -H "Authorization: Bearer $API_KEY" https://api.astria.ai/tunes/666678/prompts \
          -F prompt[text]="<lora:tune_id:strength> a painting of ohwx man in the style of Van Gogh" \
          -F prompt[negative_prompt]="old, blemish, wrin" \
          -F prompt[super_resolution]=true \
          -F prompt[face_correct]=true \
          -F prompt[callback]="https://optional-callback-url.com/to-your-service-when-ready?prompt_id=1" 

Node.js

const fetch = require('node-fetch');
const FormData = require('form-data');

// Note the hard-coded 666678 which is the tune_id of SDXL 1.0 from the gallery
const API_URL = 'https://api.astria.ai/tunes/666678/prompts';
const API_KEY = 'YOUR_API_KEY'; // Replace with your actual API key
const headers = { Authorization: `Bearer ${API_KEY}` }

const form = new FormData();
form.append('prompt[text]', '<lora:tune_id:strength> a painting of ohwx man in the style of Van Gogh');
form.append('prompt[negative_prompt]', 'old, blemish, wrin');
form.append('prompt[super_resolution]', true);
form.append('prompt[face_correct]', true);
form.append('prompt[callback]', 'https://optional-callback-url.com/to-your-service-when-ready?prompt_id=1');

fetch(API_URL, {
  method: 'POST',
  headers: headers,
  body: form
}).then(response => response.json())

Python

import requests

# Note the hard-coded 666678 which is the tune_id of SDXL 1.0 from the gallery
API_URL = 'https://api.astria.ai/tunes/666678/prompts'
API_KEY = 'YOUR_API_KEY'  # Replace with your actual API key

headers = {
    'Authorization': f'Bearer {API_KEY}'
}

data = {
  'prompt[text]': '<lora:tune_id:strength> a painting of ohwx man in the style of Van Gogh',
  'prompt[negative_prompt]': 'old, blemish, wrin',
  'prompt[super_resolution]': True,
  'prompt[face_correct]': True,
  'prompt[callback]': 'https://optional-callback-url.com/to-your-service-when-ready?prompt_id=1'
}
files = []
files.append((f"tune[prompts_attributes][{i}][input_image]", load_image(prompt['input_image'])))

response = requests.post(API_URL, headers=headers, data=data)