API developer key is invalid error

Updated on:
October 31, 2023

In instances where you encounter an "Invalid API Developer Key" error message, resolution can often be achieved by following the instructions outlined in this guide article. Check it out! 

In this article you will learn how to:

1. Fix the API developer key is invalid error

Fix the API developer key is invalid error

The error message "The API developer key is invalid" can be solved by logging in using incognito mode. It is likely caused by the user being logged into multiple Google Accounts in the same browser window.

Here are a few simple steps you can take to resolve this issue:

Step 1: Clear your browser's cache

The first step is to clear your browser's cache. Sometimes, your browser may hold onto an outdated version of your API key, which can cause this error message to appear. 

To clear your browser's cache, follow the instructions for your specific browser:

  • For Google Chrome, click on the three dots in the top-right corner of the browser and select "History." Then, click on "Clear browsing data" and select "Cookies and other site data" and "Cached images and files."

  • For Firefox, click on the three lines in the top-right corner of the browser and select "Options." Then, click on "Privacy & Security" and scroll down to "Cookies and Site Data." Click on "Clear Data" and select "Cookies and Site Data" and "Cached Web Content."

  • For Safari, click on "Safari" in the top menu bar and select "Preferences." Then, click on the "Privacy" tab and click on "Manage Website Data." Select "Remove All" to clear your browser's cache.

Step 2: Retry your request

After clearing your browser's cache, try your request again.

Feedback and feature suggestions

We created Portant in 2021 and the feedback we have received since then has been very helpful and greatly appreciated. If you have any feedback please feel free to send us an email at contact@portant.co or use our contact form here: https://www.portant.co/support


Blake and James

More than mail merge

You can do a lot more than just mail merge with Portant. Portant is a fully-fledged online document automation solution that can optimise many different document flows. You can use our online document automation platform to optimise your repetitive work, so you can get back to doing the work you enjoy.

Get started
Most Popular Templates

Save hours of manual work in just a few clicks

Transform your work life with responsive, fully customizable, and easy-to-use templates.