Amazon was struck by a glitch Friday afternoon that briefly interrupted service. The Seattle-based online retailer’s website was down for about 50 minutes. Users could see the homepage, but search results provided a page which said only “HTTP Status 400: The request by the client was syntactically incorrect ().”

Beyond its own vast online offerings, thousands of businesses rely on Amazon for cloud services and web-based platforms for their own sales.

In Fortune magazine’s annual ranking of the world’s most admired companies, released Friday afternoon, Amazon came in No. 3, behind Apple and Google.

Attempts to reach Amazon for comment were not successful.

charlesr@washpost.com