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

# Glossary

> A list of terms and definitions related to the Paywint API and payment processing.

## Signature Verification

The process of ensuring that a request or webhook payload was sent by Paywint and hasn’t been tampered with. Paywint includes a signature in each request and webhook, which you can verify using a shared secret key.

## Sandbox Environment

A testing environment where developers can safely test API calls and integrations without affecting real-world data. Paywint provides a **Sandbox** environment for developers to test their integration before going live.

## Production Environment

The live environment where real transactions are processed. Once you’ve successfully tested in the Sandbox, you can switch to the **Production** environment to start handling actual user data and payments.

## Response Codes

Numerical codes returned by the server in response to an API request, indicating the result of the request. Common codes include:

* `200 OK`: Request was successful.
* `400 Bad Request`: The request was malformed or invalid.
* `422 Unprocessable Entity`:  Input data does not meet defined constraints.

***

## Still confused?

If you come across terms that aren't listed here or need more clarification, feel free to reach out to our support team at [support@paywint.com](mailto:support@paywint.com). We're here to help!