launchdarkly-openfeature-server

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 on this page — 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

launchdarkly-openfeature-server on PyPI

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

Evidence: launchdarkly_openfeature_server-0.5.1-py3-none-any.whl

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