> ## Documentation Index
> Fetch the complete documentation index at: https://developer.sandbox.co.in/llms.txt
> Use this file to discover all available pages before exploring further.

# Environments

> Understand test and production environments, their host URLs, and how to use separate API credentials for each.

Sandbox provides separate test and production environments to help you develop and test your integration before going live.

| **Environment** | **Host url**                     | **Credentials prefix** | **Billing** |
| :-------------- | :------------------------------- | :--------------------- | :---------- |
| Test            | `https://test-api.sandbox.co.in` | `key_test`             | Free        |
| Production      | `https://api.sandbox.co.in`      | `key_live`             | Billed      |

## Test environment

Use the test environment to develop and test your integration without affecting real data or incurring charges. The test environment mirrors production capabilities.

* Separate API credentials with `key_test` prefix
* Free API calls for testing
* Isolated from production data
* Safe for experimentation

For a hands-on walkthrough of setting up Postman collections and running your first test request, see [Test environment](/guides/developer-resources/test_environment).

## Production environment

Use the production environment for live integrations with real data. Your subscription plan determines how Sandbox bills API calls.

* Separate API credentials with `key_live` prefix
* Billed API usage
* Real data and transactions
* Production-grade reliability

<Warning>
  Never use production credentials in your test environment or vice versa. Keep your credentials separate and secure.
</Warning>

Ready to make your first API call? See the [Quickstart](/guides/get-started/quickstart).