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Not sure which SDK to use? Check out our Integration Overview documentation.

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Overview

For server-side applications, Flipt v2 provides a REST API for evaluating flags. The REST API SDKs are available in the following languages:
These SDKs are the same ones that are available for the Flipt v1 REST API and are backward and forward compatible which means there is no need to rewrite your existing code to integrate with Flipt v2.

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Authentication

Server-side SDKs authenticate with Flipt using client tokens or JWTs. For detailed setup instructions, see the Connecting Applications to Flipt guide.

Node/TypeScript

Evaluate flags in your Node applications

Python

Evaluate flags in your Python applications

Go

Evaluate flags in your Go applications

Rust

Evaluate flags in your Rust applications

Java

Evaluate flags in your Java applications

PHP

Evaluate flags in your PHP applications

C#

Evaluate flags in your C# applications

Request a Client

Need a client in another language? Let us know!