Twitter's application programming interface is something that programmers can use to make applications, websites and widgets that interact with Twitter itself. The conversation that happens between these programs and the Twitter API takes place over HTTP, the hypertext transfer protocol that acts as a foundation to the World Wide Web.
An API is a defined way for a program to carry out a task, the detailed set of instructions to repeatedly perform the same assignment. Because a site such as Twitter requires users to log in and provide an associated password, programmers using associated APIs to interact with Twitter can encounter username and password issues.
Twitter itself has no password length limit for its users. As a result, the Twitter API similarly does not have a maximum ceiling regarding password length. The same combination of letters, numbers and characters that comprise a password for a Twitter login will crossover within the Twitter API world. Any sequence of characters -- with the exception of white space -- is acceptable.
Twitter API Uses
Programmers can turn to the Twitter API to create an application that combines Twitter's capabilities with a programmer's own site. Programmers can also use API to simplify a user's experience with Twitter on a mobile device or to provide any number of related services. In these cases, a programmer can prompt for a user to provide her Twitter username and password without the third-party program itself actually storing the password. The developers section of Twitter dedicates a portion of its space to an API FAQ for additional information.
Even though the Twitter API does not have a password length limit, programmers who intend for their users' submissions to still interact with Twitter must pay attention to length limits when it comes to the tweets themselves, which are limited to 140 characters. The Twitter API FAQ provides an explanation to programmers on how to expedite the process of counting characters.