I am developing an application in which I need to search item on ebay.com with the help of bar code.
Can some one guide me how to search product in ebay.com by query string like we normally do in google.com http://www.google.com/search?q=bar code?
Here is a list of complete eBay API (unofficial) and official one is here.
To cut the long story short, if you need to query ebay by a keyword, say "ipod". You need to use findItemsByKeywords API operation in Finding API:
The REST-like query will be something like this:
http://svcs.ebay.com/services/search/FindingService/v1?OPERATION-NAME=findItemsByKeywords&SERVICE-VERSION=1.11.0&SECURITY-APPNAME=YourAppId&RESPONSE-DATA-FORMAT=XML&REST-PAYLOAD&keywords=ipod&paginationInput.entriesPerPage=2
Where you need to specify: APPNAME. Which you will get after registering on eBay developer program here
If you are building a phone app, you need to use redlaser API (it's an eBay company)