The UserInputService JumpRequest event fires when there is a jump request from the client (i.e. when the client pressed the spacebar or jump GUI button on mobile).

This event fires whenever the user tries to make their Player/Character jump. Default behavior responds to a jump request by setting the player’s Humanoid/Jump property to true, which makes the player’s character jump.

The event can be used to track every time a player wants to jump. Instead of using it to make a player jump, this should be used to change default jump behavior - such as disabling jumping.

For example, the code below prints “Jump” every time the player sends a jump request.

local UserInputService = game:GetService("UserInputService")

function onJumpRequest()
    print("Jump!")
end

UserInputService.JumpRequest:Connect(onJumpRequest)

Since this event fires multiple times for a single jump request, using a debounce is suggested.

If you would like to connect keys or buttons to other actions, consider using events such as UserInputService/GetKeysPressed and UserInputService/InputBegan or the ContextActionService.

As this event only fires locally, it can only be used in a LocalScript.