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

# Introduction

Some of the key functionalities of the Startrail-Sdk-Js include:

* Provides simple access to EOA without crypto wallet and knowledge
* Provides the user information including a user's email with support for multiple social(SNS) and email based login
* Signs an arbitrary message with the Ethereum private key associated to your EOA
  * This can be used to connect the wallet to your website
* Executes blockchain transactions through our API with meta-transactions
  * Users sign [EIP-712 ](https://eips.ethereum.org/EIPS/eip-712)typed message, our API wraps it and broadcast. The signature given by the user cannot be compromized, and it gets unwrapped on-chain. There's no gas fee payment required by users

{% hint style="success" %}
See more details for our available [login providers details](/startrail-sdk-js/login-providers.md)
{% endhint %}

We will use the word SDK and Startrail-Sdk-Js interchangeably within rest of this document.

## 🤖 Built for AI coding tools

From **v2.2.0** the SDK ships first-class resources for LLMs and AI coding agents, so tools like Claude, Cursor and Copilot integrate it correctly with minimal context.

<table data-view="cards"><thead><tr><th></th><th></th><th></th></tr></thead><tbody><tr><td><strong>📄 llms.txt</strong></td><td>Machine-readable API reference — install, lifecycle, every method signature, the environment table and the error catalogue.</td><td>Bundled in the npm package:<br><code>node_modules/@startbahn/startrail-sdk-js/llms.txt</code></td></tr><tr><td><strong>🤖 AGENTS.md</strong></td><td>Rules and the canonical <code>construct → login → action</code> pattern for agents writing code against the SDK.</td><td>In the SDK source repository</td></tr><tr><td><strong>💬 Typed TSDoc</strong></td><td>Rich hover docs and autocomplete on the public class and request/response types, straight from your editor.</td><td>Bundled in the package types</td></tr></tbody></table>

{% hint style="info" %}
Point your AI assistant at `node_modules/@startbahn/startrail-sdk-js/llms.txt` for an accurate, version-matched reference instead of relying on its training data.
{% endhint %}

## Table Of Contents

* [Getting Started](/startrail-sdk-js/getting-started.md)
  * start development with SDK
* [Wallet Methods](/startrail-sdk-js/wallet-methods.md)
  * wallet based methods description
* [Startrail API Methods](/startrail-sdk-js/startrail-api-methods.md)
  * methods calling Startrail API from SDK
* [Login Providers](/startrail-sdk-js/login-providers.md)
  * social(SNS) and email based login details
* [Authentication Integration](/startrail-sdk-js/authentication-integration.md)
  * integrate user authentication with your backend system
* [Error Catalogue](/startrail-sdk-js/errors.md)
  * error responses from SDK
* [Change Logs](/startrail-sdk-js/change-logs.md)
  * concise summary of the changes, updates, and fixes made to the SDK


---

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