---
title: "Unauthorized"
url: "https://docs.adyen.com/errors/unauthorized"
source_url: "https://docs.adyen.com/errors/unauthorized.md"
canonical: "https://docs.adyen.com/errors/unauthorized"
last_modified: "2026-05-27T12:56:27+02:00"
language: "en"
---

# Unauthorized

[View source](/errors/unauthorized.md)

## Cause

Adyen APIs return this error when:

* Invalid API credentials were used in the request.
* The API credentials lack permissions.

## Solution

To resolve this error:

* Check and update the API key or the basic auth username and password.
* If you receive this error for a Management API endpoint, contact your admin user so they can check the API permissions. For other APIs, contact our [Support Team](https://ca-test.adyen.com/ca/ca/contactUs/support.shtml?form=other) to ask for additional permissions.

## Error codes

Find the specific cause and solution for each error code.

### 00\_401 - Unauthorized

**Cause**: The API credential used in the request is invalid or does not have the right permissions.\
**Solution**: Check and update the API credentials used in the request, or ask for additional permissions.