Flux

An open-source text-to-image AI model developed by Black Forest Labs that generates high-quality images from text prompts with improved prompt following and visual quality.

Flux publishes 3 APIs on the APIs.io network: Editing API, Generation API, and Results API. Tagged areas include Artificial Intelligence, Image-Generation, Machine-Learning, Open-Source, and Text-to-Image.

The Flux catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Flux’s developer surface includes authentication, documentation, getting-started guide, engineering blog, changelog, signup flow, and 13 more developer resources.

🌐 Visit website 📡 Source on GitHub

45.9/100 developing ▬ flat Agent 40/100 agent ready Full breakdown ↓
scored 2026-08-20 · rubric v0.12.0

AccessFreemiumSelf serve⚡ Free to try

3 APIs 1 MCP Servers

Artificial IntelligenceImage-GenerationMachine-LearningOpen-SourceText-to-Image

Kin Score

Kin Score How this is scored →
scored 2026-08-20 · rubric v0.12.0

Composite quality — 45.9/100 · developing

Contract Quality 16.8 / 25

Developer Ergonomics 8.1 / 20

Access Clarity 10.0 / 20

Operational Transparency 3.4 / 13

Contract Governance 1.2 / 12

Discoverability 6.5 / 10

Agent readiness — 40/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/flux: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 3

Individual APIs this provider publishes, each with its own machine-readable definition.

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Rate Limits 1

Documented rate limits and quota policies.

Flux Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

JSON Schema 1

Standalone JSON Schema definitions for this provider's data models.

Get Started 2

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Signup

Signup

Documentation 2

Reference material describing how the API behaves

JSONSchema

JSONSchema

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

MCPServer

MCPServer

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

JSONLD

JSONLD

Build 3

SDKs, sample code, and the tooling you integrate with

PostmanWorkspace

PostmanWorkspace

GitHubOrganization

GitHubOrganization

GitHubRepository

GitHubRepository

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

IssueTracker

IssueTracker

ChangeLog

ChangeLog

Commercial 3

Pricing, plans, and the legal terms of use

License

License

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: flux
name: Flux
description: An open-source text-to-image AI model developed by Black Forest Labs that generates high-quality images from
  text prompts with improved prompt following and visual quality.
type: Index
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/flux.png
url: https://raw.githubusercontent.com/api-evangelist/flux/refs/heads/main/apis.yml
created: '2025-01-01'
modified: '2026-05-19'
specificationVersion: '0.23'
tags:
- Artificial Intelligence
- Image-Generation
- Machine-Learning
- Open-Source
- Text-to-Image
tags_raw:
- AI
- Image Generation
- Machine Learning
- Open Source
- Text to Image
apis:
- aid: flux:flux-editing-api
  name: Flux Editing API
  description: Endpoints for submitting image editing requests using FLUX.1 Kontext models. Accepts an input image and a text
    instruction to produce a transformed output image.
  humanURL: https://docs.bfl.ai/
  baseURL: https://api.bfl.ai/v1
  tags:
  - Editing
  properties:
  - type: OpenAPI
    url: openapi/flux-editing-api-openapi.yml
  - type: Documentation
    url: https://docs.bfl.ai/
  - type: GettingStarted
    url: https://docs.bfl.ml/quick_start/generating_images
  - type: Authentication
    url: https://docs.bfl.ai/
  - type: JSONSchema
    url: json-schema/flux-generation-request-schema.json
  - type: Documentation
    url: https://docs.bfl.ml/kontext/kontext_image_editing
- aid: flux:flux-generation-api
  name: Flux Generation API
  description: Endpoints for submitting image generation requests using FLUX models. Each endpoint targets a specific model
    variant and returns a task ID for polling.
  humanURL: https://docs.bfl.ai/
  baseURL: https://api.bfl.ai/v1
  tags:
  - Generation
  properties:
  - type: OpenAPI
    url: openapi/flux-generation-api-openapi.yml
  - type: Documentation
    url: https://docs.bfl.ai/
  - type: GettingStarted
    url: https://docs.bfl.ml/quick_start/generating_images
  - type: Authentication
    url: https://docs.bfl.ai/
  - type: JSONSchema
    url: json-schema/flux-generation-request-schema.json
  - type: Documentation
    url: https://docs.bfl.ml/kontext/kontext_image_editing
- aid: flux:flux-results-api
  name: Flux Results API
  description: Endpoints for polling the status and retrieving completed image editing results.
  humanURL: https://docs.bfl.ai/
  baseURL: https://api.bfl.ai/v1
  tags:
  - Results
  properties:
  - type: OpenAPI
    url: openapi/flux-results-api-openapi.yml
  - type: Documentation
    url: https://docs.bfl.ai/
  - type: GettingStarted
    url: https://docs.bfl.ml/quick_start/generating_images
  - type: Authentication
    url: https://docs.bfl.ai/
  - type: JSONSchema
    url: json-schema/flux-generation-request-schema.json
  - type: Documentation
    url: https://docs.bfl.ml/kontext/kontext_image_editing
common:
- type: IssueTracker
  url: https://github.com/black-forest-labs/flux/issues
- type: License
  name: Apache-2.0
  url: https://github.com/black-forest-labs/flux/blob/main/LICENSE
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/flux/overview
- type: AgenticAccess
  url: agentic-access/flux-agentic-access.yml
- type: DomainSecurity
  url: security/flux-domain-security.yml
- type: Authentication
  url: authentication/flux-authentication.yml
- type: JSONLD
  url: json-ld/flux-context.jsonld
- type: JSONSchema
  url: json-schema/flux-generation-request-schema.json
- type: Website
  url: https://bfl.ai/
- type: Documentation
  url: https://docs.bfl.ai/
- type: GettingStarted
  url: https://docs.bfl.ml/quick_start/generating_images
- type: GitHubOrganization
  url: https://github.com/black-forest-labs
- type: GitHubRepository
  url: https://github.com/black-forest-labs/flux
- type: Blog
  url: https://bfl.ai/blog
- type: ChangeLog
  url: https://docs.bfl.ai/release-notes
- type: TermsOfService
  url: https://bfl.ai/legal/flux-api-service-terms
- type: PrivacyPolicy
  url: https://bfl.ai/legal/privacy-policy
- type: Signup
  url: https://auth.bfl.ai/register
- name: MCP Server
  url: https://github.com/black-forest-labs/flux-mcp
  type: MCPServer
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Flux

APIs 3

Postman Collections 3

Open Collections 6