MCP server for Fal AI image tools and Chatterbox TTS
npm install fal-mcpMCP server for Fal AI image tools and local TTS with configurable models.
- Built-in models: Nano Banana Pro and Flux 2 ready to use
- Image utilities: Background removal and upscaling tools
- Text-to-Speech: Chatterbox TTS integration for local speech synthesis
- Custom models: Add your own favorites via environment variable
- Flexible auth: FAL_KEY only required for Fal tools (TTS works without it)
``bashFull installation with Fal AI + Chatterbox TTS
claude mcp add fal-mcp \
-e FAL_KEY=your_api_key \
-e CHATTERBOX_URL=http://localhost:8880 \
-- npx -y fal-mcp
$3
bash
claude mcp list
`Environment Variables
| Variable | Required | Description |
|----------|----------|-------------|
|
| For image tools | Your Fal AI API key from fal.ai |
| FAL_MODELS | No | Comma-separated list of additional Fal model IDs |
| CHATTERBOX_URL | No | Chatterbox TTS server URL (default: http://localhost:8880) |Built-in Models
| Alias | Model ID | Description |
|-------|----------|-------------|
|
nano-banana-pro | fal-ai/nano-banana-pro | Fast, high-quality generation (default) |
| flux-2 | fal-ai/flux-2 | Flux 2 text-to-image |Tools
$3
Generate an image from a text prompt. Requires FAL_KEY.
Parameters:
-
prompt (required): Text description of the image
- model: Model alias or full Fal ID (default: nano-banana-pro)
- aspect_ratio: 21:9, 16:9, 4:3, 3:2, 1:1, 2:3, 3:4, 9:16, 9:21 (default: 16:9)
- image_size: Preset sizes (square, square_hd, portrait_4_3, etc.) - use aspect_ratio instead for more control
- seed: Integer for reproducible resultsExamples:
`
"Generate an image of a sunset over mountains"
"Generate a 1:1 square image of a cat"
"Generate a 9:16 portrait using flux-2"
"Generate with aspect ratio 21:9: a cinematic landscape"
$3
Remove the background from an image using BiRefNet. Requires FAL_KEY.
Parameters:
-
(required): URL of the image to process
- model: General Use (Light), General Use (Heavy), or Portrait (default: Light)
- operating_resolution: 1024x1024 or 2048x2048 (default: 1024x1024)
- output_format: png or webp (default: png)
- refine_foreground: Whether to refine edges (default: true)Examples:
`
"Remove background from https://example.com/photo.jpg"
"Remove background with Portrait model from this headshot URL"
$3
Upscale an image using Clarity Upscaler. Requires FAL_KEY.
Parameters:
-
(required): URL of the image to upscale
- upscale_factor: 1-4 (default: 2)
- prompt: Optional guidance prompt (default: "masterpiece, best quality, highres")
- creativity: How much the model can deviate, 0-1 (default: 0.35)
- resemblance: How much to preserve original, 0-1 (default: 0.6)
- seed: Integer for reproducible resultsExamples:
`
"Upscale https://example.com/small.jpg by 4x"
"Upscale this image with high resemblance (0.9)"
$3
Generate speech audio from text using Chatterbox TTS. Requires local Chatterbox server.
Parameters:
-
(required): The text to convert to speech
- voice: Voice to use (default: alloy)
- output_format: mp3, wav, opus, or flac (default: mp3)
- speed: Speech speed multiplier 0.25-4.0 (default: 1.0)
- exaggeration: Emotion intensity 0.25-2.0 (default: 0.5)
- cfg_weight: Pace/adherence control 0.0-1.0 (default: 0.5)
- language: Language code (en, es, fr, de, ja, ko, etc.)Examples:
`
"Generate speech: Hello, welcome to our podcast"
"Say 'Bonjour!' in French with high exaggeration"
"Convert this paragraph to speech and save as wav"
Supported Languages:
Arabic, Danish, German, Greek, English, Spanish, Finnish, French, Hebrew, Hindi, Italian, Japanese, Korean, Malay, Dutch, Norwegian, Polish, Portuguese, Russian, Swedish, Swahili, Turkish
$3
List all available tools and models (built-in + custom).
Adding Custom Models
Set
with comma-separated Fal model IDs:`bash
FAL_MODELS=fal-ai/flux-pro/v1.1,fal-ai/ideogram/v3,fal-ai/recraft/v3
`Custom models get auto-generated aliases from their IDs:
-
→ flux-pro-v1.1
- → ideogram-v3You can use either the alias or full model ID when generating.
Chatterbox TTS Setup
Chatterbox TTS is a local text-to-speech server with voice cloning capabilities.
$3
bash
docker run -d --name chatterbox-tts \
-p 8880:8880 \
--gpus all \
travisvn/chatterbox-tts-api:latest
`$3
bash
docker run -d --name chatterbox-tts \
-p 8880:8880 \
--device=/dev/kfd --device=/dev/dri \
-e HSA_OVERRIDE_GFX_VERSION=11.0.1 \
travisvn/chatterbox-tts-api:rocm
`Development
bash
Clone and install
git clone https://github.com/danielrosehill/fal-mcp.git
cd fal-mcp
npm installRun in dev mode
FAL_KEY=your_key npm run devRun with Chatterbox only (no Fal key)
CHATTERBOX_URL=http://localhost:8880 npm run devBuild for production
npm run build
``MIT