X

Members sign in with their X account, in the system browser.

Before you start

Console	X Developer Portal
Endpoint group	Social Login
Email	Only for apps on a high enough access tier. When absent, it comes back empty
Signs in	In the browser

Create the app

1. Open the X Developer Portal and create a project, then an app inside it.

2. Open the app’s User authentication settings and set them up.

3. Choose Read as the app permission. Sign-in needs nothing more.

4. Choose Web App as the type of app.

5. Add the callback address under Callback URI / Redirect URL: the string from Memberside → API Keys → Social Login → X, which looks like https://yoursite.com/wp-json/memberside/v1/social/callback/x.

6. Fill in the Website URL with your site.

7. Copy the API Key and API Key Secret from Keys and tokens.

About the email address

X releases email addresses selectively

Requesting a member’s email address requires a higher access tier than the default, which X grants on application. Without it the sign-in still works and the address comes back empty — nothing fails, but a first-time member cannot be given an account from what X returned.

Where the address is present, it is X’s confirmed_email and is trustworthy, so Memberside will match an existing account with it.

Plan for both outcomes. A community that treats X as a way for existing members to sign in more quickly needs nothing extra. A community that expects new members to register through X should apply for that access first.

What to paste into Memberside

Under Memberside → API Keys → Social Login → X:

Field	Value
Client ID	The API Key
Client secret	The API Key Secret

When it does not work

Symptom	Cause	Fix
“Callback URL not approved”	The address is not registered on the app	Add it under User authentication settings
No email comes back	The app’s access tier does not include the address	Apply for a higher one, or accept sign-in only
The member is asked to authorise every time	Expected for read-only apps	Nothing to fix
“Could not authenticate you”	The key or secret is wrong	Regenerate them and paste again