# About

This API provides services to validate businesspartners and identifiers.

### Tutorials & Instructions

To get more information on how to use CDQ APIs check available [Tutorials](/documentation/tutorials/tutorials-landing-page) & [Instruction](/documentation/instructions/instructions-landing-page).

### Authorization

Before trying CDQ APIs, user must be authenticated:

1. Paste the API Key in the console's security bar into the `X-API-KEY` field.


![](/assets/auth7.0d4fb05fa55bc16d828c76e9976f979930ffadb949cfc149a6617cc6518ab57d.6fde6558.png)

1. After pasting the API Key, the green padlock will appear.


![](/assets/auth8.28e02515b78db57ec32c07fd6bd7d296484e64f65ef6a3bc5296520cb1da8d65.6fde6558.png)

Be careful
Green padlock doesn't mean that the API Key was pasted correctly.

1. Check your API key for missing characters or extra space before trying.


#### No API Key?

1. Check how to get one on [authentication page](/documentation/instructions/authentication).
2. Follow the steps above.


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