> ## Documentation Index
> Fetch the complete documentation index at: https://signatureapi-daf4ee54.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Test/Live Mode Error

> Error

## What Happened

The requested resource (URL) exists in your account but either:

* You are trying to access a test resource with a live API key
* You are trying to access a live resource with a test API key

Learn more about [test and live modes](/docs/api/test-mode).

<Tip>The response includes a `detail` property with more information about this error.</Tip>

## How to Fix

Retry the request with an API key in the right mode (test or live).

<div className="mt-12">
  <Icon icon="message-smile" size={26} />  Still stuck? [Contact support](https://signatureapi.com/support).
</div>