Have the lower courts imposed too high of a standard on federal prisoners who seek a certificate of appealability following the denial of a 28 U.S.C. § 2255 motion?

QUESTION PRESENTED 1. Have the lower courts imposed too high of a standard on _ po 4e federal prisoners who seek a certificate of appealability following the denial of a 28 U.S.C. § 2255 motion? 2. Are federal prisoners required to pay a $505.00 fee to apply for a certificate of appealability following the denial of a 28 U.S.C. § 2255 motion even when the appeal is not allowed? a \