> ## Documentation Index
> Fetch the complete documentation index at: https://docs.agd.sa/llms.txt
> Use this file to discover all available pages before exploring further.

# Development Guide

> Set up your development environment for Agd Ejar API integration

## Development Setup

<Info>
  **Prerequisites**:

  * A code editor (VS Code recommended)
  * Postman for API testing
  * Agd Ejar API credentials
</Info>

### 1. Environment Setup

First, set up your development environment variables:

<CodeGroup>
  ```bash .env theme={null}
  # API Configuration
  AGDEJAR_URL=https://app.agdejar.sa
  CLIENT_ID=your_client_id
  CLIENT_SECRET=your_client_secret

  # Optional Configuration
  DEBUG=true
  ENVIRONMENT=development
  ```

  ```javascript config.js theme={null}
  const config = {
    baseUrl: process.env.AGDEJAR_URL,
    auth: {
      clientId: process.env.CLIENT_ID,
      clientSecret: process.env.CLIENT_SECRET
    },
    debug: process.env.DEBUG === 'true'
  };

  export default config;
  ```
</CodeGroup>

### 2. Authentication Helper

Create a helper function to manage authentication:

<CodeGroup>
  ```javascript JavaScript theme={null}
  async function getAccessToken() {
    const response = await fetch(`${config.baseUrl}/oauth/token`, {
      method: 'POST',
      headers: {
        'Content-Type': 'multipart/form-data'
      },
      body: new URLSearchParams({
        grant_type: 'client_credentials',
        client_id: config.auth.clientId,
        client_secret: config.auth.clientSecret,
        scope: 'read'
      })
    });
    
    return response.json();
  }
  ```

  ```python Python theme={null}
  import requests

  def get_access_token():
      response = requests.post(
          f"{config['base_url']}/oauth/token",
          headers={'Content-Type': 'multipart/form-data'},
          data={
              'grant_type': 'client_credentials',
              'client_id': config['auth']['client_id'],
              'client_secret': config['auth']['client_secret'],
              'scope': 'read'
          }
      )
      return response.json()
  ```
</CodeGroup>

## Testing Tools

### Postman Setup

1. Import our [Postman Collection](https://documenter.getpostman.com/view/39514920/2sAY4yfMHr)
2. Create an environment with these variables:
   * `base_url`: [https://app.agdejar.sa](https://app.agdejar.sa)
   * `client_id`: Your client ID
   * `client_secret`: Your client secret
   * `access_token`: Will be automatically set after authentication

## Error Handling

Implement proper error handling in your development environment:

```javascript theme={null}
try {
  const response = await makeApiCall();
  if (!response.ok) {
    const error = await response.json();
    console.error('API Error:', error);
    // Handle specific error cases
    switch (error.code) {
      case 'TOKEN_EXPIRED':
        await refreshToken();
        break;
      // Add other error cases
    }
  }
} catch (err) {
  console.error('Network Error:', err);
}
```

## Best Practices

1. **Rate Limiting**
   * Implement exponential backoff
   * Cache responses where appropriate
   * Monitor API usage

2. **Security**
   * Never commit credentials to version control
   * Use environment variables
   * Implement proper token management

3. **Debugging**
   * Enable debug logs in development
   * Use proper error handling
   * Monitor API responses

## Troubleshooting

<AccordionGroup>
  <Accordion title="Authentication Failures">
    * Verify your credentials are correct
    * Check token expiration
    * Ensure proper Content-Type headers
  </Accordion>

  <Accordion title="Rate Limiting Issues">
    * Implement request throttling
    * Add proper error handling
    * Contact support for limit adjustments
  </Accordion>

  <Accordion title="Integration Problems">
    * Check our [API Reference](/api-reference/introduction)
    * Review [Common Issues](/faq/common-issues/troubleshooting)
    * Contact [support](mailto:b2b@agd.sa)
  </Accordion>
</AccordionGroup>

## Need Help?

If you encounter any issues during development:

* Email us at [b2b@agd.sa](mailto:b2b@agd.sa)
* Check our [API Status](https://stats.uptimerobot.com/koyjLJpRaj)
* Review our [FAQ](/faq/introduction)