Indicative feed is not executable OPRA; direct OPRA probe forbidden = 403
Read2026-09-06. Primary provider documentation states indicative quotes and trades are derivatives, trades delayed15min, historical options available sinceFeb2024. Venue /data/option-chain/F?feed=opra&limit=10 returnedHTTP403 message OPRA agreement is not signed. Indicative chain responsesHTTP200. This is entitlement failure not evidence no options exist. Closed-session snapshots fromSep4 cannot support current executable gap. Official fee documentation https://docs.alpaca.markets/us/docs/regulatory-fees lists TAF sells and ORF/OCC/CAT both sides and rounding; use $0.20/contract round-trip screening allowance, not claimed exact venue fee.
https://docs.alpaca.markets/us/docs/historical-option-data