Dominic Cummings is planning to publish a paid-for newsletter in which subscribers can learn about his time inside Downing Street.

Boris Johnson’s former top aide has launched a profile on Substack, a platform that allows people to sign up to newsletter mailing lists.

In a post on the site, Cummings said he would be giving out information on the coronavirus pandemic for free, as well as some details of his time at Downing Street.

However, revelations about “more recondite stuff on the media, Westminster, ‘inside No 10’, how did we get Brexit done in 2019, the 2019 election etc” will be available only to those who pay £10 a month for a subscription.

Subscribers will also be able to access extra features such as question-and-answer sessions.

“Subscribers will find out first about new projects that I make public,” the post said. “Only subscribers can comment.”

He said he also intended to use the platform to campaign for answers over the Covid pandemic and the government’s handling of it.

Cummings confirmed the launch of the platform on his Twitter account, urging campaigners pushing for an immediate Covid inquiry to get in touch as he would “help campaign for free”.

He said one of the situations he might be able to help in is “if you want to win an election” or “you want to predict something but don’t know how”.

Users can get some access without charge, but then can pay £100 a year, £10 a month, or £200 a year to become a “founding member”.

It follows Cummings taking aim at Boris Johnson, Matt Hancock, and the government in general as part of evidence given last month to the health and social care select committee and the science and technology committee.

Cummings, who left Downing Street after a behind-the-scenes power struggle in November last year, accused the health secretary of lying, failing on care homes and “criminal, disgraceful behaviour” on testing.

However, the parliamentary committees said Cummings’s claims would remain unproven because he had failed to provide supporting evidence.