Enlarge / Here's the line that Twitter added to its API Developer Agreement on Jan. 19, two days after it cited "long-standing API rules" for why third-party apps may not be working. (credit: diffchecker)
"Long-standing" can apparently mean "tomorrow" at Elon Musk's Twitter, as the company has changed its developer agreement to seemingly justify its banning of third-party clients. The change happened two days after a vague tweet about "enforcing long-standing API rules" without pointing to any.
As noted by Internet sage Andy Baio, a text comparison (diff check) of Twitter's developer agreement between the effective dates of October 10, 2022, and January 19, 2023, shows only one change besides the effective date: a new line added to the section "Restrictions on Use of Licensed Materials." The addition restricts the ability of developers to:
c) use or access the Licensed Materials to create or attempt to create a substitute or similar service or product to the Twitter Applications;
With that, Twitter put an end to an era, one in which third-party clients not only coexisted with Twitter's official app—originally based on Tweetie, an early third-party app itself—but often introduced and drove new features. Twitter's official apps and its website are now the only reliable ways to access the service.
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