How to check tax preparer credential on IRS directory?

You can check tax preparer credentials from the IRS website by using the link here. >>> https://irs.treasury.gov/rpo/rpo.jsf

IRS Professional credentials are Enrolled Agents, Attorneys, CPA, Enrolled Actuary, Enrolled Retirement Plan Agent.

"Annual Filing Season Program Participant" is a non-credentialed title for tax return preparers.