Goalkeeper Ben Williams, 31, and attacker Mo Shariff, 21, have both joined the club this Tuesday on non-contract terms.
Subject to receiving the relevant clearances from the F.A and the Football League, the pair will now go into Bantams boss Phil Parkinson's squad for the Coventry fixture.
Manchester-born Williams joins the Bantams having left Scottish side Hibernian at the end of last season.
After moving north of the border in 2012, the shot-stopper was Hibs' number 1 for the two seasons he was at Easter Road, playing 74 times in total in the Scottish Premier League for the Edinburgh-based side.
Williams, who started his career with home-town club Manchester United, featured in the Scottish F.A Cup final and the UEFA Europa League as well during his two-year spell with Hibernian.
During his twelve-year career as a professional, the 6' 2'' goalkeeper has also made over 100 appearances for both Crewe Alexandra and Colchester United.
Williams moved to Crewe on a permanent basis in 2004 following his departure from Old Trafford, spending four years at the Alexandra Stadium in the process.
He kept goal for Colchester for three years between 2009 and 2012 before his move to Hibernian. Williams also enjoyed a year at Carlisle United either side of his spells at Crewe and Colchester.
Fellow new signing Shariff moves to the Coral Windows Stadium after impressing while recently on trial with the Bantams.
Shariff has featured in three friendlies for City over recent weeks, including last Saturday's draw at home to Hartlepool United where he hit the crossbar with a fizzing drive from distance.
The forward-thinking player, whose full name is Abdalla Mohamed Shariff, came to the Bantams' attention after departing Premier League new-boys Queens Park Rangers over the summer.
The Burundi-born Shariff actually started his career with non-league side Slough Town before impressing QPR while on trial with the London side back in August 2010.
Shariff initially signed a one-year deal with the R's before being handed a fresh two-year extension just six months later.
The right winger, who can also play as an striker, made one appearance for QPR when he came on as a second half substitute during their Capital One Cup tie with Swindon Town at the start of last season.
During his time at Loftus Road, Shariff also took part in loan spells at St Albans City, Staines Town, Woking and Dagenham & Redbridge.