how to transition from sandbox to live

[rawbeans]

In the documentation, there are instructions for hooking into the Paypal Sandbox apis. The only mention of transitioning to a live environment is setting the boolean setting PAYPAL_SANDBOX_MODE to False.

When I change this setting to False, I get an error returned from paypal:
ERROR Error 10002 - Security header is not valid

Do I have to change my credential settings when going live as well?

I can't seem to find any other password / username / signature settings on the Paypal developer site. Should my app be using the classic apis or the REST paypal api?

[codeinthehole]

Do I have to change my credential settings when going live as well?

Yes, I think so - although I've never actually been through the whole process before myself. I think the PayPal live servers will require a different username/password and signature - the error message you're seeing suggests so too.

Have you created a merchant account with PayPal? That is where I would expect to find the relevant creds.

[rawbeans]

Yes I have a merchant account with PayPal. At first I thought this was an issue with classic vs REST apis.

I managed to find the live API credentials. They are not app specific, and are not created/found in the developer portal. Instead, you go to paypal.com, login with a merchant account, and request live api credentials.