Banal situation: there is a noname site without a documented API and how this API is always necessary to identify yourself, then to use in scripts.
To do this, use Fiddler or Charles. Maybe it's old instruments and now there is something a bit more practical of the two, tell me what you use and why these.
In the vast found this article: https://alternativeto.net/software/postman/,
where the following supposedly equivalent, but they are, as I understand it, more for testing:
- Insomnia REST Client
- Advanced REST Client (ARC)
- HTTP Client
- API Fortress
- Windows RestClient
- Rest Client
They of course say nothing to me, but if it worked, tell me experiences, what helped and how they do.