Issue:

The API worked correctly yesterday (3-Sep-2026).
Today (4-Sep-2026), every call to getCandleData returns: HTTP 403 - "Access denied because of exceeding access rate"
This happens even on a test with only 5 symbols, spaced well under 1 request/second, with no other calls running in parallel.
Login (loginByPassword) and live quotes (market/v1/quote) both succeed normally — only the historical data endpoint is rejected.
Suspect this may be a temporary account-level throttle/block triggered by repeated testing earlier today, rather than a real-time rate limit, since even trivial request volumes are still being rejected.