How to search ALL sites with the advanced API?

Question

I can make a request to Stack Overflow as follows, which searches with keywords in titles:

    /2.2/search/advanced?title=vlookup%20index%20match&site=stackoverflow

My question is whether there is way to make such a search cross all the sites of Stack Exchange?

Answer 1

No, there is no easy way to do this via the API.

Related feature requests:

1. Provide a method to search for sites winch merely wanted a search for site name/description. It was declined.
2. Search across Stack Exchange sites in Android app. To implement this usually would mean that a supporting method would be added to the API. This feature-request has been ignored.

Your alternatives are:

1. Scrape the Stack Exchange network search results page, EG stackexchange.com/search?q=foo
2. Loop through /2.2/search/advanced for each site and aggregate the results.
3. Use some third-party search API, like the DuckDuckGo Instant Answer API.