Firebird with restfull service and web api in C #

Hello, within a project I came across the following situation, I need to replicate information from a Firebird Desktop db to a db SQL Server Web, as both architectures do not talk to each other, the solution found is an api web application and work with JSON, perfect in parts, I came across the situation of how to connect between both databases, it is necessary to create a local application that connects to Firebird and forward the information to the api web, or this connection is possible to be made on the web api? if anyone has any tip to give me, or link from any forum or something that deals with the subject, thank you already.