You cannot run X-Ray Finance on a single lead by hand in the dashboard. There is no run button on the contact, and no Run again button in History. X-Ray Finance runs automatically on the leads your rules pick, and that is the only way a check starts.
This article explains why, and what to do when you want a lead checked again.
Where you might look
The contact's X-Ray Data tab has no run button, in any state. It only shows the result, or the reason there is none. See Reading X-Ray Results on a Contact.
X-Ray > History lists every lookup with its status and cost, but its actions are limited to syncing a result to your CRM. See X-Ray History.
You also cannot check an arbitrary email address or phone number. A check always belongs to a lead who submitted your form.
Why there is no manual run
Every X-Ray Finance check rests on the lead's agreement, given on your form with the Privacy Notice shown, and the check passes that notice along. A check started from the dashboard has no form in front of the lead, so X-Ray does not offer manual runs.
An automatic check also needs the same things every time:
A first and last name, an email and a US phone number on the contact.
An active X-Ray subscription and enough wallet funds.
What to do when you want a lead checked
To check new leads, make sure a rule covers the form. Turn on X-Ray for the form, and keep the rule on Lead Captured. See Turning X-Ray On and Auto-Lookup Rules.
To find out why a lead was not checked, open the contact and read the X-Ray Data tab, or hover the status in X-Ray > History. See Why an X-Ray Lookup Did Not Run.
To fix the cause and get a check, the lead has to go through the form again, once what was missing is in place. For example:
Your wallet was empty: add funds or raise your auto-recharge cap, and the lead's next submission can be checked. See X-Ray Plans, Wallet, and Top-Ups.
The form had no X-Ray rule: add one, and new submissions can be checked.
The lead gave no US phone number: a new submission with one can be checked.
The 14-day rule
X-Ray does not check or charge the same lead twice in a short time. If a lead already has a completed X-Ray Finance check from the last 14 days, a new submission is skipped and the contact keeps the earlier result. The skip is free.
A check that did not complete (no result, skipped or failed) does not count, so the lead can be checked on a later submission.
Good to know
A check is charged only when a result comes back. A skip, a failure or no result costs nothing.
If a lead already has a check running, a second one is not started.
Results you already have stay on the contact, even if you cancel X-Ray.