While we’re talking API formatting nuances, perhaps you can shed some light on how the JSON ought to look when passing symbols via POST method when creating a new Watchlist. Here’s an unanswered thread with the same issue.
I’m currently using the following for a POST:
URL: "https://paper-api.alpaca.markets/v2/watchlists"
Body: {"name":"test","symbol":["MRNA","PFE"]}
as per the Docs.
Error message explicitly says
request body is invalid