Ask HN: How to Connect Without APIs?

OK so I am building a general AI agent similar to manus.im and genspark.ai or saner.ai.

I want to add Integrations like GMAIL, NOTION, CALENDAR, GITHUB, YOUTUBE, Twitter, Reddit, Google Workspace, Microsoft Workspace,

—almost 2K Integrations.

This would be almost impossible through APIs, as a solo dev.

Anyone got a solution?

(Looking for FREE or Cheap or Pay-As-You-Go solutions)