21inc: A Crawler for the Machine-Payable Web
In this tutorial, we'll show you how to set up a crawler that checks the status of bitcoin-payable endpoints as a scheduled job. We call these "402 endpoints" after the famous HTTP Error 402: Payment Required that was built into web browsers from the beginning - and which we've now implemented on the 21 Bitcoin Computer in the context of bitcoin-payable APIs.
https://21.co/learn/crawl-the-machine-p ... ayable-web