Fal

A general-purpose Model Context Protocol server that puts the full power of fal.ai inside any MCP client.

fal.ai is a generative-media powerhouse — 600+ image, video, audio, and text models (FLUX, Kontext, Veo, Kling, Suno-style audio, and more) served on some of the fastest inference infrastructure in the industry. This server hands that entire catalog to an MCP client (Claude Code, Claude Desktop, Cursor, etc.) through a small, clean set of tools: run any model by id, manage the async job queue, browse and search the model catalog, and inspect a model's exact input schema before calling it.

Why fal.ai

• Breadth that's hard to beat. One API key unlocks 600+ production models across every generative modality — no per-vendor integrations, no juggling SDKs.
• Built for speed. fal's inference stack is engineered for low-latency generation, so fast models return in seconds and heavy jobs stream through a robust async queue.
• Always current. New state-of-the-art models land on fal continuously — pointing this server at a new model_id is all it takes to use them.
• Schema-first, no guesswork. Every model publishes an OpenAPI schema, so fal_get_model_schema lets your agent discover exact inputs and defaults instead of guessing.
• Agent-friendly by design. A predictable REST surface and a clean queue model make fal a natural fit for autonomous, multi-step generative workflows.

This MCP server is a thin, faithful bridge to that platform — it stays out of the way and lets fal.ai shine.

Tools

Tool	Purpose
fal_run_model	Run a model synchronously and block for the result (best for fast models, <2 min)
fal_submit_request	Submit a job to the async queue and get a request_id back immediately (best for video/training)
fal_check_status	Poll a queued request's status (IN_QUEUE / IN_PROGRESS / COMPLETED)
fal_get_result	Fetch the final output of a completed queued request
fal_cancel_request	Cancel a request that's still IN_QUEUE
fal_list_models	Search/browse the fal.ai model catalog to find the right model id
fal_get_model_schema	Fetch a model's OpenAPI schema — exact input fields, types, defaults
fal_encode_file_as_data_uri	Locally base64-encode a file so it can be passed as an image_url-style argument without a separate upload step

Setup

1. Get an API key from fal.ai/dashboard/keys.
2. Build the server:

   npm install
   npm run build
   

3. Add it to your MCP client config (e.g. Claude Code's .mcp.json or Claude Desktop's config), pointing at dist/index.js and setting FAL_KEY:

   {
     "mcpServers": {
       "fal": {
         "command": "node",
         "args": ["/absolute/path/to/fal-mpc/dist/index.js"],
         "env": {
           "FAL_KEY": "your-fal-api-key"
         }
       }
     }
   }
   

Typical workflows

Quick image generation:

fal_run_model(model_id="fal-ai/flux/dev", arguments={"prompt": "a sunset over mountains"})

Not sure what a model accepts?

fal_get_model_schema(model_id="fal-ai/flux-pro/kontext")

Slow model (video) — fire and check back later:

fal_submit_request(model_id="fal-ai/minimax/video-01", arguments={"prompt": "a rocket launch"})
  -> fal_check_status(model_id=..., request_id=...)
  -> fal_get_result(model_id=..., request_id=...)   # once COMPLETED

Using a local image as input:

fal_encode_file_as_data_uri(file_path="/path/to/photo.jpg")
  -> pass the returned data: URI as image_url in fal_run_model / fal_submit_request

Find a model for a task:

fal_list_models(query="background removal")

Notes

• Base64 data URIs work directly as file inputs anywhere fal expects a URL — fal_encode_file_as_data_uri handles this locally (no fal upload API call needed). For files already hosted publicly, just pass the URL directly.
• fal_run_model has a 5-minute timeout; anything slower should go through fal_submit_request.
• All tools support response_format: "json" for structured output or "markdown" (default) for readability.

Evaluation

evaluation.xml contains 10 read-only QA pairs testing fal_get_model_schema against known model defaults. Run with the harness described in the mcp-builder skill's evaluation guide. Since fal.ai model schemas can change as models are updated, spot-check these against the live API before relying on them.