Check That Bike US API in JSON format is accessible with a Key. This service could be useful for developers who want to develop their own apps related to loss prevention of bicycles in the United States. On the website, users can enter a bike's frame number located often under the bottom bracket in recent bikes. Results will display if the used bike had an unusual past, given that over 563,000 bikes are stolen every year according to the site. Users can sign a petition to get additional police assistance, as a way to support this crowdsourced bike recovery project.