> ## Documentation Index
> Fetch the complete documentation index at: https://docs.authsignal.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Server SDKs
> Use Authsignal's server-side SDKs for Node.js, C#, Java, Ruby, Python, PHP, and Go.
Server SDKs make it easier to interact with our [REST API](/api-reference/server-api/overview) from your server-side code.
## Installation
```bash npm theme={null}
npm install @authsignal/node
```
```bash yarn theme={null}
yarn add @authsignal/node
```
```bash pnpm theme={null}
pnpm add @authsignal/node
```
```bash bun theme={null}
bun add @authsignal/node
```
```bash theme={null}
dotnet add package Authsignal.Server.Client
```
**Gradle**
Add this dependency to your project's build file:
```groovy theme={null}
implementation 'com.authsignal:authsignal-java:2.3.0'
```
**Maven**
Add this dependency to your project's POM:
```xml theme={null}
com.authsignal
authsignal-java
2.3.0
```
```bash theme={null}
gem 'authsignal-ruby'
```
```bash theme={null}
pip3 install authsignal
```
```bash theme={null}
composer require authsignal/authsignal-php
```
```bash theme={null}
go get github.com/authsignal/authsignalgo/v2
```
## Initialization
Initialize the Authsignal client by providing your tenant's Server API secret key and the API URL for your region.
```ts Node.js theme={null}
import { Authsignal } from "@authsignal/node";
const authsignal = new Authsignal({
apiSecretKey: "YOUR_SECRET_KEY",
apiUrl: "YOUR_API_URL",
});
```
```csharp C# theme={null}
using Authsignal;
var authsignal = new AuthsignalClient(
apiSecretKey: "YOUR_SECRET_KEY",
apiUrl: "YOUR_API_URL"
);
```
```java Java theme={null}
import com.authsignal.AuthsignalClient;
AuthsignalClient authsignal = new AuthsignalClient(
"YOUR_SECRET_KEY",
"YOUR_API_URL"
);
```
```ruby Ruby theme={null}
require 'authsignal'
Authsignal.setup do |config|
config.api_secret_key = ENV["YOUR_SECRET_KEY"]
config.api_url = "YOUR_API_URL"
end
```
```python Python theme={null}
from authsignal.client import AuthsignalClient
authsignal = AuthsignalClient(
api_secret_key="YOUR_SECRET_KEY",
api_url="YOUR_API_URL"
)
```
```php PHP theme={null}
Authsignal::setApiSecretKey("YOUR_SECRET_KEY");
Authsignal::setApiUrl("YOUR_API_URL");
```
```go Go theme={null}
import "github.com/authsignal/authsignalgo/v2/client"
client := NewAuthsignalClient(
"YOUR_SECRET_KEY",
"YOUR_API_URL",
)
```
## Regions
The API URLs for each region are defined below.
| Region | API URL |
| ------------- | ---------------------------------- |
| US (Oregon) | `https://api.authsignal.com/v1` |
| AU (Sydney) | `https://au.api.authsignal.com/v1` |
| EU (Ireland) | `https://eu.api.authsignal.com/v1` |
| CA (Montreal) | `https://ca.api.authsignal.com/v1` |
## Usage
## Repositories