What was the text of Jack Dorsey's first Twitter post?

Jack Dorsey's first Twitter post read, “just setting up my twttr.”

Dorsey published the message on March 21, 2006, at 12:50 p.m. Pacific time while the service was still known by its early shorthand name, Twttr. The deliberately missing vowels reflected the project's original identity and the era's connection to short SMS codes. The post was a functional test rather than a polished announcement: it simply signaled that the prototype was being configured.

Twitter grew out of brainstorming at Odeo, a podcasting company. Dorsey developed the idea of using text messages to share status updates with a small group, and the first prototype was initially used internally by Odeo employees. The service was introduced publicly later in 2006 and eventually adopted the fuller Twitter name.

Common alternatives such as “hello world” or “welcome to twttr” are plausible-sounding inventions, not the historical text. The spelling “twttr” is essential: Dorsey's original post did not say “Twitter.”