If you use the Google AJAX Search API, there's no limit to the number of daily search queries you can perform; the limit is on the number of actual search results returned by the API. However, regardless of any limits on the results, the AJAX Search API is deprecated. That means that Google will be providing no further updates or feature upgrades.
Search Limits
Google puts no limit of the number of searches you run through the AJAX Search API. Similar APIs, such as the Google SOAP Search API, have daily limits of 1,000 searches. However, the maximum number of actual results returned per search is 32, according to the official Google AJAX API Blog. Google increased this from the previous maximum of eight results.
API Search
The AJAX API allows you to embed a search box on your website. Changing the code allows you to select the search results a query returns. For example, you can allow standard Web searches, Google Book searches, video searches and photo searches. Each is limited to the same number of search results.
Deprecation Announcement
In November 2010 Google announced that the AJAX API will no longer be updated, which is known at Google as deprecation. You can still use the API, and the code is freely available on the Google Code website. However, the API is limited in terms of updates. For example, if Google adds a new search feature to its main search API, the update won't be reflected in the AJAX version.
Alternative
As of February 2012, Google recommends switching from the deprecated AJAX API to the JSON/Atom Custom Search API. This version limits you to 100 free search queries each day. To add more you'll need to set up billing through the API console. Google's rates for extra searches are $5 for every 1,000 search queries in February 2012.
Search Limits
Google puts no limit of the number of searches you run through the AJAX Search API. Similar APIs, such as the Google SOAP Search API, have daily limits of 1,000 searches. However, the maximum number of actual results returned per search is 32, according to the official Google AJAX API Blog. Google increased this from the previous maximum of eight results.
API Search
The AJAX API allows you to embed a search box on your website. Changing the code allows you to select the search results a query returns. For example, you can allow standard Web searches, Google Book searches, video searches and photo searches. Each is limited to the same number of search results.
Deprecation Announcement
In November 2010 Google announced that the AJAX API will no longer be updated, which is known at Google as deprecation. You can still use the API, and the code is freely available on the Google Code website. However, the API is limited in terms of updates. For example, if Google adds a new search feature to its main search API, the update won't be reflected in the AJAX version.
Alternative
As of February 2012, Google recommends switching from the deprecated AJAX API to the JSON/Atom Custom Search API. This version limits you to 100 free search queries each day. To add more you'll need to set up billing through the API console. Google's rates for extra searches are $5 for every 1,000 search queries in February 2012.


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Faizan
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