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How to connect Black Forest Labs to Claude

Connect Claude Web, Desktop and Cowork to Black Forest Labs MCP. Generate a product image with flux, edit a portrait using a text prompt, and more using natural language, with authentication handled for you.

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Black Forest Labs provides hosted FLUX models for generating and editing images and videos. It offers fast, flexible media creation with asynchronous processing and fine-tuning support.

14 Tools

Introduction

Claude is Anthropic's AI assistant, available on the web, in the desktop app, and on mobile. Cowork is its agent for knowledge work, and it runs on all of those surfaces too. Connected to your apps, Claude can work with your files and services to accomplish complex tasks on your behalf.

This guide walks you through the easiest and most secure way to connect your Black Forest Labs account to Claude via Composio Connect, enabling it to generate a product image with FLUX, edit a portrait using a text prompt, check remaining Black Forest Labs credits, and more such actions on your behalf without compromising your account security.

Setup is the same on Claude Web, Desktop, and Cowork, and you only need to do it once. The connector is tied to your account, so it's available in all three.

Also integrate Black Forest Labs with

ChatGPTHermesAtomic Agent

Connecting Black Forest Labs to Claude Web, Desktop, and Cowork

Two ways to add the Composio connector. Pick whichever you prefer.

1. Add with one click

Click the button. Claude opens with the Composio connector filled in. Click Add, then go to step 2.

Add to Claude

Add manually

In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top.

Claude Desktop connectors screen with Add custom connector selected

Click Add custom connector and paste in the Composio MCP server URL:

bash
https://connect.composio.dev/mcp
Add custom connector dialog with Composio MCP server URL

2. Authorize in your browser

Click Connect. You'll be redirected to a browser window where you can authorize Composio to continue.

Composio authorization screen for Claude Web, Desktop, and Cowork

3. Connect your Black Forest Labs account

Back in Claude, ask it to connect to Black Forest Labs or give it any Black Forest Labs-related task.

For example, ask Claude to:

  • "Generate a product image with FLUX"
  • "Edit a portrait using a text prompt"
  • "Check remaining Black Forest Labs credits"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Claude, and your Black Forest Labs account is ready to use.

What is the Black Forest Labs Claude Connector, and what's possible with it?

The Black Forest Labs MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Black Forest Labs account. It provides structured and secure access to hosted FLUX image and video tools, so your agent can generate and edit images, create and transform videos, manage fine-tunes, and check project credits on your behalf.

  • Image generation and editing: Have your agent create FLUX images from prompts, edit reference images, erase unwanted objects, expand images beyond their original canvas, deblur them, or generate images with an existing fine-tune.
  • Video creation and transformation: Direct your agent to generate videos from text or source materials, edit existing videos with a prompt, or upscale videos by a selected amount.
  • Virtual try-on experiences: Let the agent combine authorized person and garment images to create virtual try-on results.
  • Generation progress and results: Instruct your agent to check the status of image or video tasks and retrieve their completed results.
  • Fine-tune and credit management: Have your agent review available fine-tunes, inspect a specific fine-tune, and check the project's current credit balance before paid generation or editing work.

Troubleshooting

1. Why does Claude not use the Composio connector for Black Forest Labs?

The connector can show as connected, but Claude must use it in each Black Forest Labs conversation.

  • Click + at the lower left of the chat, or type /.
  • Hover Connectors.
  • Turn on Composio.
  • Ask Claude to connect to Black Forest Labs again.

2. Why does Claude show an MCP server error before Black Forest Labs connects?

Claude can show Couldn't reach the MCP server or Authorization with the MCP server failed when you add the connector for Black Forest Labs.

  • Check that the connector URL is https://connect.composio.dev/mcp.
  • Connectors run from Anthropic's cloud, so your device network is usually not the problem.
  • Add the connector again from Customize > Connectors, then ask Claude to connect Black Forest Labs.
  • If it fails again, send the error and the ofid_ reference id to support@composio.dev.

3. Why does the Black Forest Labs authorization link not work?

The Composio connector is one server. Your Black Forest Labs account connects separately when Claude asks for it.

  • If the browser does not open, or the link expires, ask Claude to retry the Black Forest Labs connection.
  • Composio creates a fresh Black Forest Labs authorization link.
  • Open that link in your browser and finish the Black Forest Labs sign-in.

4. Why do Black Forest Labs actions fail after they worked before?

The Black Forest Labs connection can expire or lose permission.

  • Ask Claude to inspect the Black Forest Labs connection.
  • If the connection is unhealthy, disconnect it when Claude prompts you.
  • Reconnect the Black Forest Labs account and retry the action.
  • If Claude shows a permission prompt, approve it before Claude changes data in Black Forest Labs.
  • If the action still fails with a permission error, check that the connected account has that permission in Black Forest Labs itself.

5. How do I switch to a different Black Forest Labs account?

Claude can manage the Black Forest Labs connection for you.

  • Ask Claude to disconnect or delete the current Black Forest Labs account.
  • Ask Claude to connect Black Forest Labs again.
  • Open the new Composio authorization link for Black Forest Labs.
  • Sign in with the other Black Forest Labs account in the browser.
  • After the account connects, ask Claude to retry the Black Forest Labs task.

6. Why is my Black Forest Labs connection missing in Claude Desktop or on a Team plan?

The connector belongs to your Claude account, so your Black Forest Labs connection works in Claude Web, Desktop, and Cowork.

  • In Claude Desktop, open Customize > Connectors.
  • Next to Composio, click ⋮ and click Clear cache.
  • If Black Forest Labs tools still do not appear, click ⋮, disconnect, remove the connector, and add it again.
  • On Team or Enterprise, an Owner or Primary Owner must enable the connector before you can connect Black Forest Labs.
TOOLS

Supported Tools

Every Black Forest Labs action and event your agent gets out of the box.

Deblur Image

Submit a paid asynchronous deblurring of an authorized image.

Edit Video

Submit a paid asynchronous prompt-directed edit of an authorized source video.

Erase Image Object

Submit a paid asynchronous removal of a masked object from an authorized image.

Generate Fine-Tuned Image

Submit a paid asynchronous FLUX fine-tuned image generation using an existing LoRA.

Generate or Edit FLUX.2 Klein Image

Submit a paid asynchronous FLUX.

Generate or Edit Image

Submit a paid asynchronous FLUX 3 image generation or authorized reference-image edit.

Generate Video

Submit a paid asynchronous FLUX 3 video task from text, authorized keyframes, a source video, or a prior draft cache.

Get Credit Balance

Return the connected BFL project's current credit balance so funds can be checked before a paid generation or editing request.

Get Fine-Tune

Return details for one BFL fine-tune by ID; an absent or inaccessible fine-tune is reported as not found without distinguishing access denial.

Get Generation Result

Fetch one status update for an asynchronous BFL task using its exact returned polling URL or task ID.

List Fine-Tunes

Return all fine-tunes accessible to the connected BFL project in one unpaginated response.

Outpaint Image

Submit a paid asynchronous expansion of an authorized image onto a larger canvas of at most 4,194,304 pixels.

Upscale Video

Submit a paid asynchronous upscale for the first 20 seconds of an authorized video, with an optional content prompt and 1.

Virtual Try-On

Submit a paid asynchronous virtual try-on using authorized person and garment images.

FRAMEWORKS

How to build Black Forest Labs MCP Agent with another framework

ChatGPT logo

ChatGPT

Use Black Forest Labs MCP with ChatGPT

Hermes logo

Hermes

Use Black Forest Labs MCP with Hermes

Atomic Agent logo

Atomic Agent

Use Black Forest Labs MCP with Atomic Agent

FAQ

Frequently asked questions

With a standalone Black Forest Labs MCP server, the agents and LLMs can only access a fixed set of Black Forest Labs tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Black Forest Labs and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. Claude Cowork fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Black Forest Labs tools.

Yes, absolutely. You can configure which Black Forest Labs scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Black Forest Labs data and credentials are handled as safely as possible.

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