Amazon has already proposed a second Amazon Go store in San Francisco, according to public records, as it opens its first San Francisco location of the cashier-free grocery chain.

The company filed for public health permits to operate a grocery store at 100 Kearny St. Amazon declined to comment on that location. The company is opening its first San Francisco store at 300 California St. on Tuesday, the company said.

The 2,300-square-foot store will operate 7 a.m. to 9 p.m., Monday to Friday. Products include prepared food and meal kits, Amazon said.

The stores don’t require shoppers to check out; instead, they check in with an app that automatically charges them after they pick up items, using sensors in the store. The company is betting the model will be the future of retail.

The Chronicle first reported last week that Amazon had received building permits for the 300 California St. store in August.

Smaller companies are also operating stores without cashiers in San Francisco, including Standard Market and Zippin.

“We welcome Amazon Go’s imminent arrival in San Francisco. Consumers hate standing in line, especially when they have limited time and all they want to do is grab lunch or a snack during a break,” said Zippin CEO Krishna Motukuri in a statement. “We firmly believe that checkout-free retail is the future.”

There are five Amazon Go stores in Seattle and Chicago, and the company is planning to expand to New York.

Roland Li is a Chronicle staff writer. Email: roland.li@sfchronicle.com Twitter: @rolandlisf