Stable Diffusion API is a paid REST API for AI image generation with SD 1.5, SDXL, Flux, ControlNet, LoRA and 10,000+ community models, aimed at developers who want to generate images without managing GPUs.
About
Stable Diffusion API is a developer-facing REST service for generating AI images. It lets a team add text-to-image generation to an application with a single HTTP request, without provisioning GPUs, installing model weights, or maintaining inference infrastructure. The service now operates as part of ModelsLab.
Developers send a POST request containing their API key, a model identifier, a prompt, and standard parameters such as image size, sampling steps, and guidance scale. The platform runs the model server-side and returns the generated output. It supports Stable Diffusion 1.5, SDXL, Flux, ControlNet, LoRA fine-tunes, and a catalog of more than 10,000 community models, along with base models such as FLUX.1, Flux Kontext, Stable Diffusion 3, Z-Image Turbo, Qwen Image 2.0 Pro, Wan 2.2, and LTX Video 2.3. Code samples are provided for cURL, Python, and Node.js.
Key Features
Pricing & Fees
- Pricing: Paid plans start at $21/month for 3,250 API calls (Basic), with a Standard tier at $47/month for 10,000 calls and an Open Source Unlimited tier at $149/month offering unlimited open-source model generations; third-party models are billed separately.
- Free tier: Creating a ModelsLab account is free, but API access itself requires a paid plan.
- Scale: The site reports more than 500 million API requests processed and over 400,000 registered users.
Who It's For
Stable Diffusion API is aimed at software developers and product teams that need to embed AI image generation into websites, apps, or automated workflows. Typical users include indie builders creating image-generation tools, SaaS teams adding visual features, design and marketing agencies producing assets at scale, and AI hobbyists experimenting with different models. It suits anyone who wants access to Stable Diffusion, SDXL, or Flux models without managing their own GPU hardware.
FAQ
What is Stable Diffusion API?It is a REST API for generating images with Stable Diffusion and more than 10,000 community models, with the provider handling the GPU infrastructure.
Is Stable Diffusion API free?No. Creating a ModelsLab account is free, but API access requires a paid plan starting at $21/month.
How do I get a Stable Diffusion API key?Sign up at modelslab.com, since the service is part of ModelsLab, and retrieve the key from the dashboard under API Settings.
Can I use the generated images commercially?Yes, users retain full copyright on images generated through the API and can use them commercially.
Which models are supported?Supported options include Stable Diffusion 1.5, SDXL, Flux, ControlNet, LoRA fine-tunes, and community uploads, and users can also upload their own models.
Related Tutorials
View all →
Related Tools
View all →
Nano Banana API by Kie.ai Kie.ai offers API access to Google's Nano Banana (Gemini 2.5 Flash Image) and Nano Banana Pro (Gemini 3 Pro Image) models for AI image generation and editing at per-image credit pricing. 
A1.art - AI Video & Image Generator Create stunning AI-generated videos and images with a1.art. Unleash your creativity with powerful, easy-to-use tools. 
GPT Image 2: OpenAi Image Generator The ultimate all-in-one AI image generator, offering extreme photorealism, flawless text rendering, and pixel-perfect UI mockups. 
AI Think - Nano Banana AI Image Generation Platform Generate high-quality images using Google's advanced Nano Banana AI technology. Supports text-to-image and image-to-image modes with multiple sizes and styles. 
Leonardo.Ai Leonardo.Ai is an AI image generation platform that helps designers, marketers, and artists create production-ready visual assets with consistent style control.