Google's json search api gives you a consistent easy to parse api. However it requires a Google API key, which limits free usage. Client-side scraping scales

Google's json search api gives you a consistent easy to parse api. However it requires a Google API key, which limits free usage. Client-side scraping scales effectively, as it distributes the reads onto all the clients. But it's also more brittle, as Google could change a small implementation of their search and break all the scraping functions.