GasBuddy API
GasBuddy (gasbuddy.com) has 2 public methods: get average gas prices and list cheapest gas stations. Each costs 1 credit per completed run (1¢ with pay as you go); failed runs are free.
Unofficial. Not affiliated with or endorsed by GasBuddy.
Methods
2Gets GasBuddy's latest reported average regular gas price, its changes and the diesel benchmark for a US state or a listed metro area. Midgrade, premium and area low/high prices are not published with these averages; updates may lag the current day.
Returns place, regular price, regular price changes (day, week, month, year), diesel price, last updated date, GasBuddy link
Readgasbuddy.com/get_average_gas_pricesFinds nearby GasBuddy stations for a US or Canadian city, address or postal code and lists their reported prices for a fuel grade, lowest listed price first.
Returns station name, brand, address, price, cash and credit prices, price age, rating, link, coordinates
Readgasbuddy.com/list_cheapest_gas_stations