generated: '2026-07-21'
method: searched
source: https://docs.string.xyz/docs/our-products
description: >-
  First-party String (string.xyz) client libraries, verified against the public
  npm registry (registry.npmjs.org) and the String-xyz GitHub organization. The
  Checkout SDK is published to npm; the Unity SDK is distributed as a C# package
  via the String-xyz/unity-sdk GitHub repository. Registry HTTP status recorded
  at fetch time. Note: the unrelated npm package "string-sdk" belongs to a
  different vendor (the "SmartLink / Context OS" platform) and is NOT included.
packages:
- language: javascript
  registry: npm
  name: "@stringpay/sdk"
  url: https://www.npmjs.com/package/@stringpay/sdk
  source: https://github.com/String-xyz/string-sdk
  install: npm install @stringpay/sdk
  description: String Checkout SDK — wraps the String payment flow (quote, transact, saved cards) into a drop-in browser integration.
  official: true
- language: csharp
  registry: github
  name: unity-sdk
  url: https://github.com/String-xyz/unity-sdk
  source: https://github.com/String-xyz/unity-sdk
  install: "Add via Unity Package Manager (git URL: https://github.com/String-xyz/unity-sdk.git)"
  license: MIT
  description: String Unity SDK — C# integration for embedding String payments inside Unity games.
  official: true