FLUX API Service Terms
Black Forest Labs
FLUX API Service Terms
Last Updated: May 29, 2025
These FLUX API Service Terms (“API Terms”) govern your access to the FLUX AI Models using our APIs. They are a part of, and incorporated into, the Black Forest Labs Developer Terms of Service (“Developer Terms”). By agreeing to these API Terms, you also agree to the Developer Terms (collectively, the “Terms”). Capitalized terms used but not otherwise defined in these API Terms have the meanings given to them in the Developer Terms. In the event of any conflict between these API Terms and the Developer Terms, these API Terms will control, but solely with respect to your access and use of the FLUX AI Models via the FLUX API.
1. The FLUX API and FLUX AI Models. The FLUX API allows you to integrate your Customer Application with the FLUX AI Models and, if permitted, fine-tune the FLUX AI Models.
2. Licenses
(a) License to the FLUX API. If you choose to use the FLUX API, and subject to the Terms, we grant you a limited, worldwide, non-exclusive, non-transferable, non-sublicensable, revocable license to access and use the FLUX API, FLUX API Models, and Derivatives of the API Models if permitted through the FLUX API (such as the fine-tuning of the FLUX API Model) solely to develop integrations whereby End Users of a Customer Application can interface with the FLUX AI Models from within the Customer Application. You may not allow access to the FLUX API, FLUX AI Models, or Derivatives from any other source other than your Customer Application. This means that you may not host (or authorize or direct a third party to host) an API endpoint to any FLUX AI Models that allows third parties to integrate or otherwise use the FLUX AI Models in or with their own products or services under these API Terms.
(b) Your License to Us. You grant us a fully paid, royalty-free, perpetual, irrevocable, worldwide, non-exclusive and fully sublicensable right and license to use, sub-license, distribute, reproduce, modify, adapt, publicly perform, and publicly display your Input and Output for the purpose of operating the FLUX Services, improving our products and services, and developing new products and services. You acknowledge the foregoing means we may use Inputs and Outputs to train and improve our artificial intelligence models, algorithms, and related technology, products, and services.
3. Fees. Fees for the use of the FLUX AI Model through the FLUX API are available at https://bfl.ai/pricing/api. The Fees may be charged up-front and then used as credits on submitted Inputs.
4. Rate Limits. In order to preserve our ability to provide you and others the FLUX Services, you will not attempt to exceed or circumvent limitations on access, calls and use of the FLUX API (“Rate Limits”), or otherwise use the FLUX API in a manner that exceeds reasonable request volume, constitutes excessive or abusive usage, or otherwise does not comply with these Terms. If you exceed or we reasonably believe that you have attempted to circumvent the Rate Limits or controls to limit use of the FLUX API then your ability to use the FLUX API and/or FLUX Services may be temporarily suspended or permanently blocked. You understand and agree that the specifications for the FLUX API shall be defined by us in our sole discretion, and you are responsible for the development and other costs associated with integrating with the FLUX API and FLUX AI Models.
5. Modifications. We may modify, change, update and/or enhance the FLUX API and/or the FLUX AI Models or any specifications or functionalities of the FLUX API and/or FLUX AI Models (a “Modification”) at any time in our sole and exclusive discretion. You acknowledge and agree that such Modifications may affect any Customer Application’s ability to access or fine-tune the FLUX AI Model and may require you to make changes to the Customer Application at your cost to continue to integrate with the FLUX API and/or FLUX AI Model. We may provide you with prior notice for material Modifications requiring changes to the Customer Application, but we will not be liable for any costs incurred by you, lost profits, or damages of any kind arising out of or in connection with any Modification whether or not we provide notice.
6. Self-Hosting. These terms do not grant you the right to download, self-host, or make derivatives of the FLUX [dev] Model. If you would like to have the opportunity to self-host our FLUX [dev] ModelsI Models, please see the FLUX [dev] Self-Hosted Service Terms.