{"name":"SalesTaxZip API","version":"v1","description":"Free US sales tax rate lookup API. Get combined, state, county, and city tax rates for any US zip code.","base_url":"https://salestaxzip.com/api/v1","endpoints":{"GET /rate/:zip":{"description":"Get sales tax rate for a specific zip code","parameters":{"zip":"5-digit US zip code"},"example":"https://salestaxzip.com/api/v1/rate/10001"},"GET /state/:code":{"description":"Get all zip codes and rates for a state","parameters":{"code":"2-letter state code (e.g., CA, NY, TX)"},"example":"https://salestaxzip.com/api/v1/state/CA"},"GET /city/:state/:city":{"description":"Get rates for all zip codes in a city","parameters":{"state":"2-letter state code","city":"City name (URL-encoded)"},"example":"https://salestaxzip.com/api/v1/city/TX/Austin"},"GET /reverse":{"description":"Calculate pre-tax amount from total price","parameters":{"total":"Total price including tax","zip":"5-digit zip code"},"example":"https://salestaxzip.com/api/v1/reverse?total=108.50&zip=10001"}},"rate_limit":"100 requests per hour (free tier)","data_freshness":"Updated monthly from official state sources","support":"support@salestaxzip.com"}