Server-side SDKs

Overview

Harness FME provides server-side SDKs that let you evaluate feature flags, run experiments, and control rollouts from your backend services.

These SDKs are designed for high-throughput, low-latency environments where feature logic must run securely and reliably without exposing rules or targeting logic to the client.

By integrating a server-side SDK, you can:

• Evaluate targeting rules securely on the server

• Maintain consistent behavior across multiple environments

• Implement feature rollouts without redeploying backend code

• Collect event data for experiment analysis

Get started

Select a backend language or framework to begin.

Elixir Thin Client SDK

Go SDK

Java SDK

.NET SDK

NodeJS SDK

PHP SDK

PHP Thin Client SDK

Python SDK

Ruby SDK