Google Trends has no public API. What it has is the same internal JSON endpoints the trends.google.com single-page app calls — and those endpoints do something most REST clients aren't built to survive: they answer with HTTP 200 and an empty body when Google decides you look like a bot.
Quick answer
A 200 OK from Google Trends' widgetdata endpoints does not mean you got data. If the response body is empty, Google soft-blocked the request without bothering to send a 429. The fix is to stop trusting the status code alone: check resp.text.strip() on every call that's supposed to return a payload, and if it's empty, rotate the proxy session and retry exactly like you would on a 429 — because that's what it functionally is.
if status == 200:
if require_body and not resp.text.strip():
