Help:OAuth

OAuth is a means of giving outside ("connected") applications the ability to perform edits and other actions on your behalf. Using this authentication protocol, you can authorize ("grant") a connected application the ability to act on your behalf without the need to divulge your password. The OAuth protocol is widely used by other websites, including major sites such as Facebook and Flickr.

Frequently asked questions
If your question is not answered here, feel free to ask on the talk page and someone will answer it for you.

Is OAuth secure?
Yes, the OAuth protocol is designed to be a secure method for third-party authorisation.

Firstly, OAuth allows third-party websites to access your account without you having to give them your password. Applications are able to access your account if and only if you authorise them to do so, and if you revoke that right then application will immediately be unable to take actions on your behalf.

Secondly, each third-party website you authorise is only allowed to take the specific actions you authorised it to. This means that, for example, if you are an administrator authorise an application that asks only for "Basic rights", if the application tries to delete a page then that wiki will reject the request. Previously, if an application had your password, you were relying on the assurances of the author of the application that it would not use your advanced rights.

How do I connect an application to my account?
A list of currently approved applications is available at Special:OAuthListConsumers.

How can I see what applications are connected to my account?
The page Special:OAuthManageMyGrants (which is also accessible from the "User profile" tab in your preferences) lists all the applications you have authorised to access your account. From this page, you can also adjust and revoke grants.

How do I remove an application's ability to access my account?
Go to Special:OAuthManageMyGrants, find the application you want to remove access for, and click "revoke access". Then, on the page that opens, click the "Deauthorise" button.

Once an application is deauthorised, it will no longer be able to access your account or take any actions on your behalf. You will have to go through that application's authorisation process again in order for it to access your account.

How do I change what actions an application can take with my account?
Go to Special:OAuthManageMyGrants, find the application you want to modify the permissions for, and click "manage access". From here you can revoke any individual permissions, excluding "Basic rights" which are the minimal rights required by all connected applications to function.

Please note that altering or removing permissions from an application's grant may cause the application to stop working properly for you.