Endpoint
Black Forest Labs published the API reference documentation for FLUX 3 Image endpoints.
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Black Forest Labs published the API reference documentation for FLUX 3 Image endpoints.
FLUX 3 Image Klein API reference
FLUX 3 Image API reference Start with the FLUX 3 Image overview , see the box format in FLUX 3 Image Editing , or follow the Bounding boxes tutorial.
POST /v1/flux-3-video Delivered dimensions for every aspect ratio are in the FLUX 3 video documentation , and full rates on the pricing page .
You can now recharge your credit balance automatically. Set a threshold and a target on the Credits page, and whenever your balance falls below the threshold, your saved card is charged to bring it back up to the target.
POST /v1/flux-tools/video-upscale-v1 See the FLUX Video Upscale documentation to get started, and the pricing page for per-resolution rates.
The maximum duration for video continuation ( v2v ) requests is now 15 seconds . Text-to-video, image-to-video, and draft enhance are unchanged at up to 20 seconds.
The FLUX MCP server now generates video with FLUX 3, directly from Claude, Cursor, Codex, Windsurf, or any MCP-compatible client.
Six new Agent Skills teach coding agents like Claude Code, Cursor, and Windsurf how to direct FLUX 3 video generations. flux-3-video , Routes a request to the skills it needs flux-3-prompt-doctor , Catches the decisions that change the payload before anything is generated flux-3-cinematic-inserts , Shot craft for text-to-video flux-3-keyframes-continuation...
FLUX 3 is our first video model: one model trained across image, video, and audio, generating video with synchronized sound. Available now as a preview.
- Video with native audio , up to 20 seconds per generation, from text, images, or a reference clip, with multilingual dialogue Keyframe control , pin images at chosen moments for controlled transitions Broad stylistic range , from candid footage to animation and cinematics, with strong typography and animated designs Image synthesis and editing , from the...
POST /v1/flux-tools/vto-v2 vto-v2 is now the recommended version. vto-v1 remains available, and we recommend migrating to v2 , see the FLUX Virtual Try-On documentation .
POST /v1/flux-tools/deblur-v1 Get started in the FLUX Deblur documentation .
When a request or result is moderated, the polling response's details field now includes a Moderation Reasons array naming the categories that triggered the filter (for example Violence or Sexual Content ). Use it to adjust the request or surface a message to your users.
POST /v1/flux-tools/outpainting-v1 See Choosing a mode in the FLUX Outpainting documentation.
POST /v1/flux-tools/vto-v1 Get started in the FLUX Virtual Try-On documentation , or try the public demo .
POST /v1/flux-tools/erase-v1 Get started in the FLUX Erase documentation , try the public demo , or read the announcement .
POST /v1/flux-tools/outpainting-v1 Get started in the FLUX Outpainting documentation , try the public demo , or read the announcement .
The FLUX image models on the BFL API.
| Release-notes page | Site | Feed |
|---|---|---|
| Release Notes docs.bfl.ai | docs.bfl.ai | None |