An anti-corruption helpline launched in Delhi on Thursday by the new city government received thousands of calls and more than 30 useful leads on its first day, the government has said.

The helpline, which can be reached on 011-27357169, was created as a top priority by the Aam Aadmi party (AAP). It aims to empower the public to become anti-graft inspectors by giving them advice on how to expose officials who demand bribes.

"People should understand that this is not a complaint number but a helpline, and an official will advise and explain to the public how to conduct a sting operation," AAP leader and Delhi chief minister Arvind Kejriwal told a news conference.

"After carrying out a sting operation, members of the public should contact the same adviser, following which a trap will be laid to nab the accused."

Kejriwal said on Thursday 3,904 calls were received by 3pm, and that 38 serious cases of graft had been reported. The helpline was found to be constantly engaged, despite repeated calls by Thomson Reuters Foundation.

Kejriwal, 45, a former tax official and social activist, said the hotline would be open from 8am to 10pm daily and would enable every Delhi citizen to become an anti-corruption crusader by helping to record evidence – audio or visual – against bribe takers.

"The purpose of launching this helpline is to create fear in the mind of every corrupt individual. Such people should fear they could be under surveillance at any time," he said, adding the vigilance department would look into corruption allegations.

The government will place advertisements in newspapers and on radio stations and put up hoardings in the city streets with the helpline number.

Tackling corruption was the AAP's main policy in the runup to the Delhi assembly elections last month, and a dedicated anti-graft helpline was one of the main priorities in the party's manifesto.

The party was formed in late 2012 after a two-year nationwide anti-corruption drive led by Kejriwal's former mentor, Gandhian activist Anna Hazare.

The fledgling party stunned many – including the ruling Congress and Bharatiya Janata party (BJP), the main opposition – in the polls last month, winning 28 of the 70 seats and forming a new city government with outside support from the Congress Party.

Political analysts say the party has tapped into growing middle-class anger with Indian politicians, who are often perceived to be siphoning off public funds instead of providing public services.

Its success in Delhi rang alarm bells for the Congress and the BJP in the runup to a national election due by May, underlining that an increasingly young and urban electorate is fed up with the established parties.

The AAP promised in its manifesto to send corrupt city legislators to jail within a year. Nationally, almost a third of India's lawmakers face criminal charges, but many are shielded by the slow-moving legal system.

The AAP plans to convert the growing public anger over corruption into votes in the national elections.