flux-image

# Flux Image Generation Generate and edit images through AceDataCloud's Flux API. > **Setup:** See [authentication](../_shared/authentication.md) for token setup. ## Quick Start ```bash curl -X POST https://api.acedata.cloud/flux/images \ -H "Authorization: Bearer $ACEDATACLOUD_API_TOKEN" \ -H "Content-Type: application/json" \ -d '{"action": "generate", "prompt": "a cat wearing a space helmet, photorealistic", "model": "flux-dev", "callback_url": "https://api.acedata.cloud/health"}' ``` > **Async:** See [async task polling](../_shared/async-tasks.md). Poll via `POST /flux/tasks` with `{"id": "..."}`. ## Models | Model | Quality | Speed | Sizes | Best For | |-------|---------|-------|-------|----------| | `flux-dev` | Good | Fast | 256–1440px | Quick generation (default) | | `flux-pro` | High | Medium | 256–1440px | Production work | | `flux-2-klein` | Good | Fastest | 256–1440px | Compact / lowest-latency Flux 2 generation | | `flux-2-flex` | High | Fast | 256–1440px | Faster high-quality generation | | `flux-2-pro` | Higher | Medium | 256–1440px | Better prompt following | | `flux-2-max` | Highest | Slow | 256–1440px | Maximum quality generation | | `flux-kontext-pro` | High | Medium | Aspect ratios | Image editing | | `flux-kontext-max` | Highest | Slow | Aspect ratios | Complex editing | ## Generate Images ```json POST /flux/images { "prompt": "a minimalist logo of a mountain", "action": "generate", "model": "flux-2-pro", "size": "1024x1024", "count": 1 } ``` ### Size Options **For dev/pro/flux-2** (pixel dimensions): - `"1024x1024"`, `"1344x768"`, `"768x1344"`, `"1024x576"`, `"576x1024"` **For kontext** (aspect ratios): - `"1:1"`, `"16:9"`, `"9:16"`, `"4:3"`, `"3:4"`, `"3:2"`, `"2:3"`, `"21:9"`, `"9:21"` ## Edit Images Use kontext models for text-guided image editing: ```json POST /flux/images { "prompt": "change the background to a beach sunset", "action": "edit", "image_url": "https://example.com/photo.jpg", "model": "flux-kontext-pro" } ``` ## Gotchas - Use pixel dimensions (e.g., `"1024x1024"`) with dev/pro/flux-2 models, aspect ratios (e.g., `"16:9"`) with kontext models - Editing requires kontext models (`flux-kontext-pro` or `flux-kontext-max`) — other models only support generation - `count` parameter generates multiple images in one request (increases cost proportionally) - `flux-2-klein` is the lightest Flux 2 model — useful when latency matters more than peak quality - `flux-2-max` produces highest quality but is slowest — use dev/klein/flex for iteration and max for final output - All generation is async — always set `"callback_url"` to get a task id immediately, then poll `/flux/tasks` using `{"id":"<task_id>"}` or `{"ids":[...],"action":"retrieve_batch"}` > **MCP:** `pip install mcp-flux-pro` | Hosted: `https://flux.mcp.acedata.cloud/mcp` | See [all MCP servers](../_shared/mcp-servers.md)