Flux Generation API
Endpoints for submitting image generation requests using FLUX models. Each endpoint targets a specific model variant and returns a task ID for polling.
Flux Generation API is one of 3 APIs that Flux publishes on the APIs.io network, described by a machine-readable OpenAPI specification.
This API exposes 1 JSON Schema definition.
Tagged areas include Generation. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, a getting-started guide, authentication docs, and 1 JSON Schema.
This API exposes 5 operations across 5 paths, and defines 7 schemas. It is described by OpenAPI 3.1.0, at version v1.
Requests are made against a single base URL, https://api.bfl.ai/v1.
Metadata
The identity and technical contract details declared by the specification.
Authentication & Security 1
Flux Generation API declares
1 security scheme
for authenticating requests.
An API key is passed in the header as X-Key (apiKeyAuth).
By default, every request must be authenticated.
apiKeyAuth— API key from the Black Forest Labs developer portal. Pass in the X-Key header for all authenticated requests.
Paths & Operations 5
Across 5 paths, the API surfaces 5 operations — 5 POST. Each is listed below with its method, path, parameters, and response codes.
Endpoints for submitting image generation requests using FLUX models. Each endpoint targets a specific model variant and returns a task ID for polling.
Schemas 7
The contract defines 7 schemas that model the data the API accepts and returns. The most detailed are FluxProGenerationRequest (9 properties), FluxDevGenerationRequest (8 properties), FluxSchnellGenerationRequest (7 properties), FluxUltraGenerationRequest (6 properties). Each schema is shown below with its type and property counts.
Specification
The full machine-readable OpenAPI contract behind this narrative.
Source
More from Flux 2
Other APIs Flux publishes across the network.
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