> For the complete documentation index, see [llms.txt](https://api-en.stridecross.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://api-en.stridecross.com/basic-information.md).

# Basic information

> This document is mainly used to explain endpoints usage, illustrate with code examples for requesting endpoints, specific interface input parameters and output parameter information

📌 **Authentication and Security Notes**

This API does not require you to apply for or include any standard  `API Key`, `AccessToken`, or `Token` in the request headers.

To identify the request source and provide customized services, you only need to pass the `sourceflag`  parameter in the regular parameters of the relevant requests (see the specific interface documentation for details).

* **What is sourceflag?** `sourceflag`  is a fixed string agreed upon in advance by both parties. For easier identification and management, it is recommended to use your **project name** (e.g., trustwallet, metamask).
* **How to obtain it?** Before integrating the project, please contact our technical support or business team to confirm this string.

### Important notice

{% hint style="info" %}
The request code examples in this document are using Axios
{% endhint %}

{% embed url="<https://www.npmjs.com/package/axios>" %}

### Contract Address

{% hint style="info" %}
StrideCross currently supports arbitrary token swaps on the following chains. Below are the contract addresses for each chain:
{% endhint %}

1. btc mainnet contract address：bc1q0fycgp9sta5a2m9weh4y4nc8u257l33p5tzykc
2. bsc mainnet contract address：0x04d6f7027ae7ce52654aa21bfb67802f0c9ea303
3. eth mainnet contract address：0x04d6f7027ae7ce52654aa21bfb67802f0c9ea303
4. polygon mainnet contract address：0x04d6f7027ae7ce52654aa21bfb67802f0c9ea303
5. arbitrum mainnet contract address：0x04d6f7027ae7ce52654aa21bfb67802f0c9ea303
6. avalanche mainnet contract address：0x04d6f7027ae7ce52654aa21bfb67802f0c9ea303
7. optimism mainnet contract address：0x04d6f7027ae7ce52654aa21bfb67802f0c9ea303
8. tron mainnet contract address：THrUA7FojKa8ypwJ77mQZUc23RADWeUVCx


---

# 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://api-en.stridecross.com/basic-information.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.