# SDK

### SDK

A JavaScript library for element.market: buying, selling, and bidding on any cryptogood. With Element.js, you can easily build your own native marketplace for your non-fungible tokens, or NFTs. These can be ERC-721 or ERC-1155 items. You don't have to deploy your own smart contracts or backend orderbooks.

[PreviousPublic API](broken://pages/2CM9kqo4lYM6HlHpGFn3)[NextGas Optimization](broken://pages/YdGaRavvKB90xcffqHAs)

Last updated 2 years ago


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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.element.market/welcome-to-element/developer/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.