Multiple image model families
Route requests to Gemini image variants, GPT Image models, and future models without rebuilding account and billing code.
Image Generation API
Image Generation API for production AI products
Use Pixapi to generate images with Gemini image models, GPT Image models, and other visual models through one authenticated REST API, one credit system, and one developer workflow.
Text-to-imageImage URLs in responseCredit-based billing
Text-to-image request
Pass the model id and prompt; Pixapi handles routing and usage tracking.
curl https://api.pixapi.ai/v1/images/generations \
-H "Authorization: Bearer $PIXAPI_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "gemini-3-pro-image-preview",
"prompt": "A cinematic product photo",
"n": 1,
"size": "1:1"
}'Direct answer: what Pixapi exposes for image generation
Pixapi image generation uses POST /v1/images/generations for synchronous text-to-image requests and POST /v1/async/images/generations for task-based image requests.
The request uses Bearer authentication, a canonical model field such as gemini-3-pro-image-preview, a prompt, and optional n, size, and quality fields.
Successful URL responses return generated assets in response.data[0].url, so server code can store the URL with the user, request id, model id, and credit record.
What a production image API needs
Competitor pages usually highlight raw model access. Pixapi adds the operational layer teams need after the prototype works.
Stable REST contract
Keep prompt, model, output count, aspect ratio, and response handling consistent across supported image providers.
Usage records and credits
Track generation spend, failed requests, and account balances in one Pixapi dashboard instead of multiple vendor consoles.
Server-side key management
Create, rotate, and revoke API keys while keeping visual generation calls behind your backend.
Documentation for agents
Docs, llms.txt, and model pages make it easier for coding agents to generate correct integration code.
Category and model pages
Use category guidance for architecture choices, then drill into model pages for parameters, pricing hints, and examples.
Image generation model choices
| Need | Recommended Pixapi route | Why it fits |
|---|---|---|
| Fast prompt-to-image output | Gemini 2.5 Flash Image | Lower-latency workflows and cost-efficient previews. |
| Higher-quality campaign assets | Gemini 3 Pro Image Preview or GPT Image 2 | Better composition control and commercial output quality. |
| Model comparison | /model catalog plus /v1/images/generations | Change only the model id while keeping request handling stable. |
| Backend product integration | Bearer-authenticated REST API | Keeps keys secret and lets your product add user-level controls. |
Related implementation resources
API documentation
Review endpoints, authentication, request fields, and response formats.
Authentication guide
Create and protect a bearer API key before making production calls.
Model catalog
Compare available image and video models by capability and cost.
Credits and pricing
Check credit packs, billing rules, and current product pricing.
Image Generation API FAQ
What is an image generation API?
It is a server-side API that accepts a prompt and model id, then returns generated image URLs or task results that your application can store and display.
Which image models does Pixapi expose?
Pixapi exposes curated image models including Gemini image models, and GPT Image variants. The live model catalog is the source of truth.
Do I need separate provider accounts?
No. Pixapi provides one account, one API key, and one credit ledger for supported model routes.
Can I use it in user-facing SaaS products?
Yes. Keep Pixapi calls on your backend, map your users to your own rate limits, and track generated assets by request id.
Add image generation to your product
Create a key, choose a model id, and send your first text-to-image request through Pixapi in minutes.
Create API key