How can I send data from one api to another api built with Swagger

We develop an api with native code in Node JS, in the dependencies of that api we include a project that is in a repository which was built with Swagger. In other words, when the API number one is executed (the one that was created in native code) the second api developed with Swagger is installed. The question is the following, we need to send a data that we receive in the first api to the second api made with Swagger.