What is the oAuth domain that is mentioned in the StackApps app registration form? I googled it but couldn't find a good description.

1 Answer 1


The OAuth domain name is the domain name that will be used to restrict the value of the redirect_uri parameter when authenticating from your application. This is done as a security precaution to prevent others from using your API key and redirecting to a domain name that does not match the one specified in the registration form.

The API documentation page for authentication makes the following brief comment when describing the redirect_uri parameter:

"redirect_uri - must be under an apps registered domain"

  • 9
    Still not that clear to me. In what way does the user or app authenticate through this domain? This has to be a domain that we control? There's no default? How does anyone provide to the API that they are affiliated with this domain?
    – Hack-R
    Commented Jun 15, 2018 at 5:28

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