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How to Generate and Edit Images in Claude Code with the FLUX MCP

Set up Black Forest Labs’ hosted FLUX MCP in Claude Code, authenticate with your BFL organization, and use its documented tools to generate and edit images.
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You can use Black Forest Labs’ hosted FLUX MCP server to generate and edit images from Claude Code by adding its remote endpoint, signing in through a browser, and asking Claude to use the image tools. The connection command is claude mcp add --transport http FLUX https://mcp.bfl.ai. BFL says generations are billed at its API rates to the organization you select during sign-in, so check that organization’s credits and current pricing before generating.

What the FLUX MCP does in Claude Code

The FLUX MCP connects Claude Code to Black Forest Labs’ hosted image service. BFL describes it as a way to generate, edit, and browse FLUX.2 images inside MCP-compatible apps without writing API code or pasting keys into chat. The server is remote and uses OAuth authentication; this is distinct from third-party projects with similar names.

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According to BFL’s official FLUX MCP repository, its generate_image tool supports text-to-image requests, prompted edits, composition using multiple reference images, style transfer, inpainting-style changes, and outpainting. A request can generate one to eight images in parallel. You can also ask for variations based on a previous result and browse recent generation history.

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Connect the server and sign in

  1. In a terminal, run claude mcp add --transport http FLUX https://mcp.bfl.ai. This adds BFL’s hosted server under the name FLUX.
  2. When the browser opens, sign in to your BFL account and choose the organization to bill. BFL says OAuth tokens refresh automatically. The selected organization is charged directly at BFL’s API rates; review the BFL site for current pricing rather than relying on an older quoted rate.
  3. In Claude Code, run claude mcp list to check that the server appears. Use /mcp to inspect its status or reauthenticate.
  4. Before requesting paid generation, confirm the selected organization has credits. To switch organizations, disconnect and reconnect, then select the intended organization during sign-in.

Choose a model for the job

The model names and use cases below are BFL’s current guidance in its repository, not independently measured rankings. The documentation does not provide benchmark results comparing their quality or speed.

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Wacom Intuos Small, Wired Graphic Drawing Tablet with Pen + Software | Battery-free pen, 4 ExpressKeys for shortcuts, works with Mac, Windows & Chromebook; Ideal for creators, students & teachers
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Model BFL’s stated use case Useful when
flux2_pro_preview (default) Balance of quality and speed for everyday work You want a general-purpose starting point.
flux2_max Highest quality for hero shots and final assets You are aiming for a more finished result and can allow for potentially longer generation.
flux2_klein_9b_preview Faster iteration; accepts up to four input images You want to iterate or combine a limited set of references.
flux2_klein_4b Fastest option Speed is the main priority.
flux2_flex Typography and readable text The image needs rendered wording.

These descriptions are selection cues, not guarantees: choose based on the finish you need, iteration speed, number of reference images, and whether accurate text matters, then inspect the output.

Write a useful generation or edit request

BFL’s prompting guidance recommends leading with the main subject, describing lighting, using hex color values when a precise color matters, putting exact rendered wording in quotation marks, avoiding negative prompts, and refining from generated results with edits or variations.

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Generate several directions

For example, BFL’s repository suggests a natural-language request such as: “Generate 4 editorial portrait variants — varied lighting, palette, and mood.” You can specify visual differences you want across the set, then compare the results and request a variation or targeted change.

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Edit an image

Attach or otherwise provide the image in Claude Code, then describe the change directly. The repository’s example is: “Add a camel on the sand.” For more controlled edits, state what should change and what visual qualities should guide the result. Prompt-based editing does not guarantee that every detail of the original will remain intact, so inspect the result and iterate if preservation matters.

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HUION Inspiroy H640P 6x4 inch Drawing Tablet 8192 Pen Pressure | Battery-Free Stylus, Tilt, 6 Hot Keys, Work with Mac/PC/Android, Digital Art for Beginner, Drawing, Writing, Design, Teaching
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  • Compact and Portable: Huion H640P computer graphics tablet features a compact, ultra-portable design at just 0.3 inches thin and 0.61 lbs light, so it slides easily into your backpack—perfect for sketching in coffee shops, taking notes in class, or editing on the go between home and studio. The 6x4 inch active area offers enough room for natural pen movements while fitting comfortably on crowded desks, or lecture hall seats.
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  • Move Beyond the Mouse: Huion Inspiroy H640P is a pen tablet that replaces your mouse for more natural, precise control. Freehand draw, take notes, or even play OSU—everything you do with a mouse, you can do better with a pen. The precise tip makes it ideal for detailed photo editing, graphic design, or signing PDF. Meanwhile, the ergonomic pen grip helps you avoid the strain that comes from hours of using a mouse.

Use exact text and color cues

If the image must contain wording, quote the exact text and consider flux2_flex, which BFL recommends for typography and readable text. For color precision, include a hex value such as #2E6F78 alongside the plain-language color description.

Troubleshoot connection, uploads, and billing

  • The FLUX tools do not appear: check claude mcp list, then use /mcp to inspect status or reauthenticate. If the connection remains unavailable, run claude mcp remove FLUX and repeat the add command.
  • Browser sign-in does not complete: first use requires browser-based BFL sign-in. A blocked pop-up or unfinished authentication can interrupt setup; complete sign-in and organization selection, then check /mcp again.
  • An attached-image edit fails: Claude Code must be allowed to upload the image to BFL. Sandbox restrictions on outbound HTTPS may block uploads; BFL’s repository suggests allowing *.bfl.ai or using a public image URL where appropriate.
  • A generation takes longer than expected: BFL notes that larger batches, flux2_max, and complex edits may take longer. Its documentation does not establish a fixed generation time.
  • Billing fails: verify that the organization selected at OAuth sign-in has credits. Disconnect and reconnect if you need to choose a different organization.

These troubleshooting notes come from BFL’s documentation and cannot guarantee identical behavior across Claude Code versions, network policies, or account configurations.

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Check BFL’s documentation when details change

Server commands, model names, tool capabilities, image limits, and pricing can change. For setup and tool details, consult the FLUX MCP repository. For the hosted service and direct-billing description, see BFL’s Help Center article “What is the FLUX MCP?”, marked updated one month before it was accessed on October 4, 2026. Always check BFL’s live pricing information before generating.

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Best Value
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Drawing Tablet XPPen StarG640 Digital Graphic Tablet 6x4 Inch Art Tablet with Battery-Free Stylus Pen Tablet for Mac, Windows and Chromebook (Drawing/E-Learning/Remote-Working)
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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.

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