Options data API cost calculator
Estimate request volume before comparing API plans. Most teams undercount selected-leg requests: chains are only the first pass, while quotes, trades, snapshots, and historical windows create the real request profile.
Daily requests
2,725
22-day month
59,950
Fit signal
Production candidate
Expiration and chain requests
25 expiration lookups and 600 chain requests make up the discovery layer.
Selected-leg depth
2,100 quote, trade, and snapshot requests come from contracts that pass first-stage filters.
Historical scale
Backtests multiply quickly across dates. Test a small representative window before committing to a full historical run.
Planning note
Build the request model from the workflow, not from a headline endpoint list
A chain scanner, quote-aware backtest, and live dashboard can all use the same API surface while creating very different request profiles. For a clean vendor comparison, write down how many underlyings, expirations, selected contracts, quote windows, trade windows, and snapshot checks you need on a normal production day.