bigcommerce – Adding API Key from Big Commerce Store
I tried recreating this and it seems to be working fine. Did you make sure you added the store url too for the new api key.
Look at the attached screenshot.
Assuming youve inputed the user name and key correctly, you also want to be sure the store url matches the API URL given when you created the new user BUT without the /api/v2 at the end.
So if your API URL happened to be
https://store-bwvr466.mybigcommerce.com for the store url