ComfyUI-FLUX-BFL-API
Custom nodes for integrating Flux models with the BFL API.
Nodes (32)
Where you iterate before you spend
The Apache-2.0 Flux 2, over the API — with the licenses and hardware taken care of
Flux 2's mid-size model without the 9B download
Klein 9B, with whatever BFL is shipping this week
The flagship Flux 2 on any GPU — because you're not running 56B locally
Generation and editing in one node
The bleeding edge of Flux 2, pre-stable — don't build your pipeline on it
The glue node that makes Flux 3 I2V keyframes actually usable
FLUX 3 image-to-video from a keyframes string
FLUX 3 text-to-video from a single node — no local model, no GPU meltdown
Remix an existing clip with FLUX 3 video-to-video — bring your own MP4
How every BFL node in this pack gets its API key
The 'how much did that render cost' node
Retire a custom Flux model for good
The API tier that started it all
Object removal that actually leaves the rest alone
The metadata drawer for a single custom Flux model
Is my custom Flux model done training yet?
The same Kontext editing, turned up to max quality
Edit photos by describing them, no mask, no Local Latent cache
See every custom Flux model on your BFL account
Outpainting where you decide the canvas, not the model
Flux Pro 1.1 is the best Flux you'll never download — here's how to run it in ComfyUI anyway
The overkill sibling, tamed into a dropdown
Your own Flux Pro 1.1 Ultra, trained by BFL — the finetune node explained
Directional outpainting the old way
BFL's Fill, wired into your ComfyUI graph — inpainting and outpainting without touching VRAM
Inpainting with a model that learned your style — Flux Pro Fill Finetune
Dress a person in a garment they never wore, from two photos
Flux VTO v2 over BFL's API
IMAGE in, base64 string out
VIDEO in, base64 MP4 out
ComfyUI-FLUX-BFL-API
Custom nodes for integrating Flux models with the BFL API.
Installation
Option 1: Install via Custom Nodes Manager
- Open the Custom Nodes Manager.
- Search for "ComfyUI-FLUX-BFL-API".
- Select the package and follow the installation instructions.
Option 2: Manual Installation
-
Clone the repository:
cd custom_nodes git clone https://github.com/gelasdev/ComfyUI-FLUX-BFL-API.git -
Install the required dependencies:
pip install -r requirements.txt -
Get your BFL API key from api.bfl.ai.
-
Add your API key to the
config.inifile:[API] X_KEY = YOUR_API_KEY BASE_URL = https://api.bfl.ai/v1/
Configuration
You can either use config.ini for a global API key, or connect a Flux Config (BFL) node directly to any generation node to override the key, base URL, and region per-node. If no config node is connected, config.ini is used automatically.
Nodes
Generation
| Node | Description |
|---|---|
| Flux 3 Video T2V (BFL) | Text-to-video with FLUX 3 Video (up to 20 s, with audio) |
| Flux 3 Video I2V (BFL) | Image-to-video — feed keyframes from the Flux 3 Keyframes node or a single image |
| Flux 3 Video V2V (BFL) | Video continuation from an existing MP4 (URL or base64) |
| Flux Pro 1.1 (BFL) | Text-to-image with Flux Pro 1.1 |
| Flux Pro 1.1 Ultra (BFL) | High-resolution text-to-image |
| Flux Dev (BFL) | Text-to-image with Flux Dev |
| Flux Pro Fill (BFL) | Inpainting / outpainting |
| Flux Pro Expand (BFL) | Outpainting with directional padding |
| Flux Erase (BFL) | Object removal via binary mask (flux-tools/erase-v1) |
| Flux Outpaint (BFL) | Image extension via target canvas + reference offsets (flux-tools/outpainting-v1) |
| Flux Virtual Try-On (BFL) | Virtual try-on — dress a person image in a garment image (flux-tools/vto-v1) |
| Flux Virtual Try-On v2 (BFL) | Virtual try-on v2 — sharper face preservation, inputs up to 4 MP (flux-tools/vto-v2) |
| Flux Kontext Pro (BFL) | Image editing with context (up to 4 images) |
| Flux Kontext Max (BFL) | Image editing with context, max quality |
| Flux 2 Max (BFL) | Flux 2 Max generation |
| Flux 2 Pro (BFL) | Flux 2 Pro generation |
| Flux 2 Pro Preview (BFL) | Flux 2 Pro preview (latest advances) |
| Flux 2 Flex (BFL) | Flux 2 Flex generation |
| Flux 2 Klein 9B (BFL) | Flux 2 Klein 9B generation |
| Flux 2 Klein 9B Preview (BFL) | Flux 2 Klein 9B preview (latest advances) |
| Flux 2 Klein 4B (BFL) | Flux 2 Klein 4B generation |
The Flux 3 Video nodes output ComfyUI's native VIDEO type — connect them to the built-in Save Video / preview nodes (requires ComfyUI ≥ 0.3.30).
Finetune
| Node | Description | |---|---| | Flux Pro Fill Finetune (BFL) | Inpainting with a finetuned model | | Flux Pro 1.1 Ultra Finetune (BFL) | Ultra generation with a finetuned model | | Flux Finetune Status (BFL) | Check the status of a finetune job | | Flux My Finetunes (BFL) | List all your finetunes | | Flux Finetune Details (BFL) | Get details of a specific finetune | | Flux Delete Finetune (BFL) | Delete a finetune |
Config
| Node | Description | |---|---| | Flux Config (BFL) | Override API key, base URL and region per-node | | Flux Credits (BFL) | Check your remaining BFL API credits |
Utils
| Node | Description |
|---|---|
| Image to Base64 (BFL) | Convert a ComfyUI IMAGE to base64 — choose jpeg (default) or png (lossless, recommended for masks) |
| Flux 3 Keyframes (BFL) | Combine up to 10 images (start, 8 middles, end) into the keyframes string for Flux 3 Video I2V — empty sockets are skipped; timing: even spreads them across the clip, timing: custom pins start at 0, middles at their time_N widgets and the end image at end_time (= clip length with duration: auto) |
| Video to Base64 (BFL) | Convert a ComfyUI VIDEO (LoadVideo output or a Flux 3 Video result) to a base64 MP4 string — feed it into Flux 3 Video V2V's start_video |
Workflow
Example workflows are available in the workflows folder.
Changelog
See CHANGELOG.md.
Contributors
Example