---
id: launchdarkly-openfeature-server
version: "0.5.1"
license: Apache-2.0
license_treatment: permissive
maintenance: active
---

# launchdarkly-openfeature-server — An OpenFeature provider for the LaunchDarkly Python server SDK

License: permissive · Maintenance: active · Downloads: 146.2K/mo

## What it is and what it does

This package is an OpenFeature provider that adapts LaunchDarkly's server-side Python SDK to work with the OpenFeature standardized API. It allows developers to integrate LaunchDarkly feature flags into applications using the OpenFeature abstraction layer, which provides a vendor-neutral interface for feature flag evaluation.

The provider is designed for multi-user server systems like web applications and handles both single-context and multi-context evaluations. It maps OpenFeature's EvaluationContext to LaunchDarkly's context model, supporting special attributes like targeting keys, private attributes, and anonymous flags. The package depends on launchdarkly-server-sdk and openfeature-sdk, and is currently in beta, meaning its API may change.

Use it for:

- Integrate LaunchDarkly feature flags into a web application using the OpenFeature standard API
- Evaluate feature flags for multi-user contexts (e.g., user + organization) in a server environment
- Gradually roll out features to subsets of users based on context attributes and targeting rules
- Switch feature flag providers later by replacing the provider while keeping OpenFeature client code unchanged

## Worth the install?

AI-flagged interpretation of the facts above — verify before relying.

Bridges LaunchDarkly's feature flag service with the OpenFeature SDK for Python, enabling standardized feature flag evaluation in server-side applications.

Yes, with conditions. Install if you are already using LaunchDarkly and want to adopt the OpenFeature standard, or if you want vendor-neutral feature flag abstraction. Avoid if you need a stable API—this is beta software and breaking changes are expected. No known security vulnerabilities as of August 2026.

## Install

pip install launchdarkly-openfeature-server
uv add launchdarkly-openfeature-server
poetry add launchdarkly-openfeature-server

## Installing launchdarkly-openfeature-server

Before you install: Low friction install with only two runtime dependencies. Actively maintained as of 2026-07-01 with recent releases. Beta status means the API is not yet stabilized and may introduce breaking changes.

License in practice: Apache-2.0 permissive license allows commercial and private use with minimal restrictions, typical for open-source SDKs.

Quickstart:

pip install launchdarkly-openfeature-server

from openfeature import api

provider = LaunchDarklyProvider(Config("sdk-key"))
api.set_provider(provider)

Requires Python 3.9 or above. Requires a valid LaunchDarkly SDK key.

Verify before relying:

- Performance characteristics and latency impact when evaluating large numbers of contexts
- Backward compatibility guarantees during beta phase and expected timeline to stable release
- Whether the provider handles network failures and offline scenarios gracefully

## Package facts

- License: Apache-2.0 (permissive)
- Python support: supports_current
- Install friction: low
- Maintenance: active
- Downloads: 146.2K/month (top 15,000 on PyPI)
- Known vulnerabilities: none known

## Tags

openfeature provider launchdarkly, feature flags server python, launchdarkly openfeature integration, feature management sdk python, multi-context feature evaluation, server-side feature flags python, feature-flags, openfeature, server-sdk

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