Button URL formula with field from table

[Jaco_van_der_We]

Hi everyone, I’m adding a button to my table, it’s a URL that includes a dynamic field agency_cardId from that table. It’s not accepting the syntax, any thoughts, please?
“https://d1s1fe8elvctzs.xxxxx.net/?cardId= agency_cardId &source=agency&token=123456789.123456789.123456789M#/”

[Kamille_Parks]

Buttons follow the same syntax rules as formula fields.

"https://d1s1fe8elvctzs.xxxxx.net/?cardId=" & {agency_cardId} & "&source=agency&token=123456789.123456789.123456789M#/"