I would love this bounty. I can solve this for you. If you go in your previous cookies and browsing history, you can click the link again if it isn't expired

Splitting this, because one half has a clean answer and the other doesn't.

Revoking — this part is concrete. Workspace Settings → Members. Pending invites

appear in that list alongside active members, and each has a menu to revoke or

cancel it. Revoking invalidates the link immediately; anyone who opens it after

that gets an invalid-invite error rather than joining. If you re-invite the same

person afterwards you get a fresh link, and the old one stays dead.

Expiry — I went looking for a documented TTL and there isn't one. Neither the

Workspaces nor the Project Members docs state whether invite links expire, and I

couldn't find a changelog entry introducing an expiry. So I'd treat auto-expiry

as unconfirmed rather than assume either way.

Practical consequence: if the reason you're asking is that a link needs to stop

working, revoke it explicitly rather than waiting it out. That's deterministic

and takes ten seconds. If you need a documented expiry policy for a security

review or an audit answer, that one genuinely needs a Railway employee to

confirm — I'd rather tell you the docs don't settle it than invent a number.