> For the complete documentation index, see [llms.txt](https://docs.symbiosis.finance/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.symbiosis.finance/developer-tools/symbiosis-js-sdk/js-sdk-configuration.md).

# JS SDK Configuration

{% hint style="warning" %}
Integrators and partners are expected to use the Symbiosis API for production integrations.
{% endhint %}

The entry point of Symbiosis JS SDK is to create an instance of the 'Symbiosis' class that takes a config preset 'mainnet' or an object of [`Config type`](/developer-tools/symbiosis-js-sdk/js-sdk-types.md#config-type) as a parameter. 

```
const symbiosis = new Symbiosis('mainnet' | config, clientId) 
```

* [Mainnet configuration](https://github.com/symbiosis-finance/js-sdk/blob/main/src/crosschain/config/mainnet.ts)

**Note on Testnet:** While a Testnet environment exists for testing purposes, functionality verified on Testnet does not guarantee the same behavior on Mainnet. We strongly recommend testing directly on Mainnet using low-cost networks and small token amounts.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## 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, and the optional `goal` query parameter:

```
GET https://docs.symbiosis.finance/developer-tools/symbiosis-js-sdk/js-sdk-configuration.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

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.