This post compares the query limits of free search APIs from different providers. It highlights that MSN Search API reportedly allows up to 10,000 queries per day, but whether that limit is per API or in total is still unclear. The post also notes that Google's Search API allows 1,000 queries per day, Yahoo's APIs allow 5,000 queries per API per day, and Amazon's allows a generous 86,400 queries per day (calculated as 1 query per second). More investigation is needed to confirm the exact limit for MSN.
I'm developing an AJAX application to automatically generate Technorati, Feedster, and MSN search boxes with relevant tags for my blog posts. It's a JavaScript webservice queryer that uses results from one service as input for another. Currently, it only supports IE6/7 due to cross-domain data source import restrictions in Firefox. I'm exploring JavaScript code signing as a potential solution. The application integrates with Yahoo webservices, with plans to include Technorati and hopefully Feedster. There are security concerns regarding my Yahoo key. I aim to have a prototype available for feedback soon.
