GET /v1/windows.csv

Downloads a complete market window as a CSV file — one request per window, no pagination.

curl -H "X-Api-Key: $KEY" -o btc-5m-1793331300.csv \
  "https://polybk.com/v1/windows.csv?symbol=btc&timeframe=5&window_start=1793331300"

Parameters — identical to /v1/rows: symbol, timeframe, window_start.

Response — text/csv attachment, header row first:

ts_iso,ts_unix,slug,symbol,timeframe_minutes,window_start_unix,window_end_unix,phase,yes_bid,yes_ask,yes_bid_size,yes_ask_size,no_bid,no_ask,no_bid_size,no_ask_size,yes_feed_age_ms,no_feed_age_ms,yes_crossed,no_crossed
2026-10-30T03:34:00Z,1793331240,btc-updown-5m-1793331300,btc,5,1793331300,1793331600,preopen,0.470000,0.480000,276.11,1047.00,0.520000,0.530000,1047.00,276.11,0,0,0,0

tip

For bulk work this endpoint is far more efficient than row-by-row calls — see bulk access.