Do I need an API key from the source platform?

No. Migratify reads public product pages directly, so you never need API keys, exports, or any access to the source store's admin.

The only extra setup that exists is for captcha or login protected websites like Shopee and AliExpress, where you install the Migratify Chrome extension and connect it with your Extension app key from the Extension page. That key comes from Migratify itself, not from the source platform. See Import from protected websites with the Chrome extension.