> For the complete documentation index, see [llms.txt](https://docs.toucan.earth/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.toucan.earth/developers/sdk.md).

# Toucan SDK

The Toucan SDK allows developers to build using Toucan's infrastructure tools on [Celo](https://celo.org/) and [Polygon](https://polygon.technology/). It provides a set of functions that allow developers to interact with Toucan Protocol's smart contracts and subgraphs using JavaScript. The SDK was built with Typescript and wraps around [Ethers.js](https://docs.ethers.org/v5/).

{% hint style="success" %}
The Toucan SDK works in web browsers and Node.js applications.
{% endhint %}

## Installation

```
npm i toucan-sdk
```

or

```
yarn add toucan-sdk
```

## Next Steps

* [Set up the Toucan Client](/developers/sdk/quickstart.md)
* For simple & quick offsetting use the [OffsetHelper functions](/developers/sdk/contract-interactions.md#offsethelper-related-methods)
* If you want to retire carbon credits from a specific project, you can use the [`redeemMany`](/developers/sdk/contract-interactions.md#redeemmany) and then the [`retire`](/developers/sdk/contract-interactions.md#retire) function.


---

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