FluxAPI.ai is a developer-oriented platform that provides API access to Black Forest Labs' FLUX.1 model family for text-to-image generation and image-to-image editing.
In terms of main capabilities, the platform supports two workflows: text-to-image and image-to-image. Text-to-image can generate images from text prompts; image-to-image can upload a reference image and use natural language to guide modifications, making it suitable for local edits, style transfer, or multi-scene transformations. Available models include FLUX.1 [pro], FLUX.1 [dev], FLUX.1 [schnell], as well as the Kontext series [dev], [pro], [max]. Among them, Kontext [dev] leans toward lightweight, contextual generation, and rapid prototyping; Kontext [pro] focuses on character consistency, local editing, and style preservation; Kontext [max] provides stronger layout control, prompt fidelity, and visual precision, making it suitable for complex editing and long-form design workflows. FLUX1.1 [pro] targets professional-grade image quality, FLUX.1 [schnell] targets low-latency, second-level generation, and FLUX.1 [dev] is suitable for experimentation, development, and tool integration.
In terms of pricing, the platform uses a credit-based billing model. Information shows that Kontext Pro is priced at $0.025 per image and Kontext Max at $0.05 per image, and it is said to be nearly half the price of official Flux API pricing ($0.04/$0.08). New accounts receive free trial credits, and credits can be purchased as needed, with no subscription, no minimum spend, and no hidden fees. Each generation task consumes a fixed number of credits depending on the selected model and generation mode. Credits can be purchased via credit/debit card or WeChat Pay.
In terms of usage, first log in to your FluxAPI.ai account. Authentication is a prerequisite for using the API, accessing the console, and managing API Keys and credit balances. After logging in, go to the API Key management page to obtain a key. All API requests require Bearer Token authentication, and if a key is leaked, it can be reset in the console at any time. New accounts have free trial credits. When submitting a task, you can provide a text prompt (to generate a new image) or a prompt plus an input image (to edit an image), and you can adjust parameters such as aspect ratio, model selection, prompt enhancement, and content moderation. Each request returns a task ID, and progress can be tracked in real time or a webhook callback can be configured to receive results automatically. Generated images can be accessed and downloaded within 14 days after generationThe platform also provides a free trial playground, allowing you to test the FLUX.1 and Kontext series models without a subscription or credit card, for prompt validation, speed testing, and output comparison. Documentation is provided in the user console after logging in, including examples and parameter references. 24/7 support is available via email or Discord.
Applicable scenarios include: content creation, brand asset pipelines, visual prototyping, multi-scenario conversion, interactive applications, real-time tools, and batch rendering, among others.
Regarding limitations, the materials do not mention specific credit package quotas, the number of credits consumed per task for each model, rate limits, concurrency caps, available regions, or other details, and these are not currently provided.
