---
title: What should I do if my API key isn’t working?
description: "When making requests to the **[Restful API](https://www.smsgatewaycenter.com/developer-api/)**, ensure the following: - Include the API key in the **request header** for **authentication** purposes. - Use the “**userid**” parameter and the API key as login credentials while using the API. - *No…"
url: "https://www.smsgatewaycenter.com/blog/kb/what-should-i-do-if-my-api-key-isnt-working/"
updated: "2025-03-03"
category: API
---

# What should I do if my API key isn’t working?

When making requests to the **[Restful API](https://www.smsgatewaycenter.com/developer-api/)**, ensure the following:

- Include the API key in the **request header** for **authentication** purposes.
- Use the “**userid**” parameter and the API key as login credentials while using the API.
- *No password parameter is required* when using an API key for authentication.

Nothing works, please contact our support team.

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