> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.repliers.com/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Understanding Test API Keys

When you create a Repliers account, you receive a test API key that allows you to explore and experiment with our APIs. This article explains what you can do with a test API key and its limitations.

### What You Can Do With a Test API Key

* Make API requests to test endpoints
* Use interactive developer playgrounds
* Build and test prototype applications
* Evaluate Repliers' API functionality
* Learn API integration patterns

### Test API Key Limitations


The test API key provides access to simulated data with the following restrictions:

* Listing data is made to mimic real world data but not representative of real MLS® listings
* No access to real-time MLS® data
* Limited updates dynamic, compared to a production MLS® data feed

### Accessing Real MLS® Data

To work with real MLS® listings, your account needs proper authorization from the relevant MLS®. The authorization process:

* Varies by MLS® organization
* Requires compliance with specific licensing requirements
* Must be completed before accessing live listing data

### Recommended Use Cases

The test API key is ideal for:

* Initial development and integration
* Solution architecture planning
* Proof-of-concept development
* API familiarization
* Basic functionality testing

For access to real MLS® data and production use, please contact our support team to begin the authorization process. Prior to doing so, we'd recommend our [MLS® data licensing guidelines](https://help.repliers.com/en/article/understanding-mls-data-licensing-for-using-our-apis-12fknh6/).

# What questions does this article answer?**

* What is a Repliers **test API key** and when do I get one?  
* What can I do with a test key (endpoints, feature coverage, playgrounds, etc.)?  
* What are the functional and data limitations of test keys?  
* Can I use a test key in a staging or demo environment?  
* How do I know when it’s time to switch from a test key to a production key?