The publication is so devoted to its social media strategy that it has no journalists, no articles and no website — apparently by design. “You’ll find that if you don’t have a website, guess what? You don’t have any server charges,” Mr. Scaramucci said.
Later, he conceded that he had “no idea what the Scaramucci Post is.”
His partner in the venture, a former hedge fund manager turned social media consultant named Lance Laifer, stood nearby, urging Mr. Scaramucci to speak into an iPhone that was transmitting the proceedings via streaming video.
Mr. Laifer, a friend of Mr. Scaramucci for years, founded Old Forge Media Management and is probably best known as the man who persuaded the actor Taye Diggs to follow tens of thousands of people on Twitter. He said the idea for the Scaramucci Post was hatched during a 1 a.m. phone call while he was visiting Disney World with his family. “What I think we can do here is take people and get them to work together to make the world a better place,” Mr. Laifer said.
“There’s a wide open space in the middle that’s not being served the way it was served when I was a kid,” Mr. Scaramucci added. “It’s the Walter Cronkite space, the space in the middle where there’s a level of objectivity.”
Guests at the party, held beneath a mirrored ceiling dotted with festive red lights, included a number of Scaramucci supporters, among them employees of his hedge fund, SkyBridge Capital. A buffet featured giant popovers and penne mushroom ragu. Mr. Scaramucci wore a sling, the result of a recent shoulder injury, which he attributed to horseplay with one of his children on the basketball court.
Long a minor celebrity on Wall Street, Mr. Scaramucci came to prominence as the silver-tongued Trump confrere whose brief run at the White House culminated in an expletive-laced tirade to a New Yorker correspondent. Recently, he hired a Hollywood publicist and has appeared on TMZ, “The View,” and “The Late Show With Stephen Colbert.”
On Monday, he announced that the Scaramucci Post has signed its first advertiser: the Knockout Times, a website about female athletes started by a woman named Jamie Lewis who said she knew Mr. Scaramucci from her time working on Wall Street. “We’re trying to bring a voice to strong female women, specifically related to athletics,” Ms. Lewis said.
One reporter began a question by noting that Mr. Scaramucci’s White House tenure had lasted only 10 days. The host interrupted.
“Hey,” Mr. Scaramucci said, a glint in his eye. “Eleven days.”
An earlier version of this article misstated the given name of the creator of the web site Knockout Times. She is Jamie Lewis, not Julie.