This is a really good first step that's citizen facing, what I would love eventually is embracing the whole agentic workflows and actually exposing MCP to tools for gov services - then, say, a law firm's AI could file court documents with MCP tools.
Basically yes, APIs just as good, but that general idea of API-first would eventually also be quite powerful.
It's not new... most people E-file (sure that is a very old service but still an "API" of some form).
So a lot of what this site does is help with the discovery of those disparate sources.