# Subs SDK

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The SDK is available for Stellar Mainnet and Testnet. [Install it ](https://www.npmjs.com/package/subs-sdk) !
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#### What is Subs SDK?

The **Subs SDK** is a lightweight JavaScript/TypeScript library that makes it easy to create and manage decentralized crypto subscription plans. With just a few lines of code, developers can set up subscription plans, generate checkout links.

Whether you're building a SaaS platform, content service, or any recurring revenue model, Subs SDK lets you go live quickly with fully on-chain payments and plan management.

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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.subsprotocol.com/developer-docs/subs-sdk.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.