As Elon Musk studies up on how to start a third political party, among the people from whom he has sought advice is a somewhat surprising choice of consultant: the right-wing blogger Curtis Yarvin, who is perhaps best known for advocating monarchism.

Mr. Yarvin is one of the most influential thinkers on the so-called tech right, where he has attracted attention for his oft-expressed distaste for traditional American democracy.

He would not seem to be a source of the kind of expertise that Mr. Musk needs as he pursues his idea for the America Party — Mr. Yarvin is not an expert on the mechanics of creating third parties or on the strategies and intricacies of running third-party campaigns.

Still, Mr. Musk and Mr. Yarvin spoke late last week about the task ahead, according to two people briefed on the conversation who insisted on anonymity to describe it. A representative for Mr. Musk did not immediately respond to a request for comment. Mr. Yarvin declined to be interviewed.

Some of Mr. Yarvin’s friends over the years have included technology leaders like Peter Thiel and Marc Andreessen, and Vice President JD Vance has cited his writing.

In talking with Mr. Musk, Mr. Yarvin shared some of his political theories, the people briefed on the conversation said.