YA/Middle Grade: in order for a bridge (?) to be traversed, the travelers must give it a secret that nobody else knows or has heard before

[Chelsea]

I don't think it's Fablehaven, I reread those fairly recently and don't remember the bridge.

[Lizzie]

This sounds really familiar. Could it be one of The Land of Stories books by Chris Colfer? I remember there several "bridge troll" type scenarios.

[Alexa]

Pretty sure it's not Percy Jackson either, I've read those a million times and nothing like that is in it.

[Joanna]

Ronan Boyle and the Bridge of Riddles?

[Lobstergirl, au gratin]

OP's account deleted. Moving to NWNK.