OpenFeature

aid: openfeature
name: OpenFeature
description: OpenFeature is a CNCF incubating open specification for feature flag management. It provides a vendor-agnostic
  API for evaluating feature flags, enabling developers to use a consistent interface regardless of the underlying feature
  flag provider. OpenFeature offers SDKs in multiple languages including Go, Java, JavaScript, Python, PHP, and .NET with
  a provider-based architecture.
url: https://openfeature.dev
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- Cloud Native
- Feature Flags
- Feature Management
- Incubating
- SDKs
- Specification
created: '2026-03-16'
modified: '2026-05-19'
specificationVersion: '0.19'
type: Index
apis:
- aid: openfeature:openfeature-spec
  name: OpenFeature Evaluation API
  description: The OpenFeature specification defines a standard API for feature flag evaluation across languages. It includes
    the Evaluation API for resolving flag values with context, the Provider API for connecting to feature flag backends, the
    Hook API for intercepting evaluation lifecycle events, and the Event API for reacting to flag configuration changes. Providers
    can be implemented for any feature flag service.
  humanURL: https://openfeature.dev/docs/reference/intro
  properties:
  - type: Documentation
    url: https://openfeature.dev/docs/reference/intro
  - type: OpenAPI
    url: https://raw.githubusercontent.com/api-evangelist/openfeature/refs/heads/main/openapi/openfeature-openapi.yaml
  - type: NaftikoCapability
    url: capabilities/openfeature-ofrep-core.yaml
  tags:
  - Evaluation API
  - Feature Flags
  - Specification
common:
- type: LinkedIn
  url: https://www.linkedin.com/company/openfeature
- type: Documentation
  name: OpenFeature Documentation
  description: Official OpenFeature documentation.
  url: https://openfeature.dev/docs/
- type: GitHubOrg
  name: OpenFeature GitHub
  description: Source code and SDKs.
  url: https://github.com/open-feature
- type: Integrations
  url: https://openfeature.dev/ecosystem/
integrations:
- name: OpenFeature
- name: Deploys by Netlify
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com