, which goes live today, has been developed by entrepreneurs Patrick Cosgrave and Oisin Hanrahan.
It has been designed to it make it easier for politicians to have a web presence and for voters to source information on them.
The service is being supported by a number of citizen organisations, including the British Youth Council, all political parties and media partners Sky, The Telegraph and The Independent.
The site currently lists over 500 candidates and carries more detailed information (such as policy and biographical details), which candidates must pay for, on over 300.
Marcus Warren, 's editor, said: "The Telegraph is very excited to be part of the MiCandidate project and to be helping our audience across the UK and the rest of the European Union make informed decisions about who to vote for in this summer's elections."
The founders, who have already launched the service in their native Ireland, will expand the site across the rest of Europe over the coming weeks via the domain name MiCandidate.eu.
The company has partnered with European media brands including Le Monde, Le Soir and Euronews.
Hanrahan said: "There are already hundreds of candidates profiled on MiCandidate.co.uk and every week we will be adding more.
"MiCandidate.co.uk puts real power back into the hands of ordinary people because for the first time people can knock on the door of all and any of their candidates online.
Julian March, executive producer of , said: "MiCandidate will help us to fulfil the important role of informing voters.
"Thanks to MiCandidate, millions of Sky News's viewers and web users will be able to learn more about their candidates."