You can ingest HTTP requests from your own tools using the same API that the official Burp Suite plugin uses. It is accessible through a OpenAPI API that can be accessed when the server is running at the following URL:
http://localhost:37232/swagger
All of the data from jswzl can be accessed through a GraphQL API. It's the same API that the VS Code extension utilizes to view code. The API has introspection enabled, and can be accessed on the server when it's running at:
http://localhost:37232/graphql