First its American astronaut Mike Massimino posting the first Twitter message from space, now it’s a race to the world’s highest tweet.

A fundraising mission to the summit of Mount Everest is auctioning off the bragging rights for the world’s highest tweet to raise money for charity.

Mountaineer and philanthropist Gavin Bate, who is raising money for his charity Moving Mountains, has set up an eBay bidding page to auction off the chance to write the world’s highest tweet to be sent from 29,000 feet above sea level.

Using a satellite phone, Bate has been detailing his ascent to the Mount Everest summit on microblogging website.

The auction offers one tweet of the winner’s choice sent by Gavin Bate via satellite from the top of Mount Everest.

Bate is calling for marketers and PR firms to get involved in the bidding to promote their brands, with money raised going towards helping street children in Nepal and Kenya.