Twitter will start charging developers to gain access to its API, a vital tool that powers popular services like TweetDelete and bots that message users about real-time data.

The microblogging site, which was taken over by Elon Musk last October, it said that starting February 9 it would «no longer support free access to the Twitter API.»

Third-party services that use the Twitter API will have to use their basic paid tier, the company said.

“Over the years, hundreds of millions of people have sent over a trillion tweets, and billions more every week,” an official Twitter account tweeted Wednesday night.

“Twitter data is among the most powerful data sets in the world. We are committed to enabling quick and comprehensive access so you can continue to build with us.»

APIs are software tools used by third-party developers to access application data and use it to create new services.

Thousands of developers use the Twitter API, which comes in free and paid versions, for things from setting reminders to sharing alerts about changes to certain Twitter accounts.

Meanwhile, researchers are using the tool to track hate speech and misinformation online.

The Twitter API is also used by news gathering service Dataminr to alert journalists to information emerging on Twitter in real time.

Previously, Twitter has third-party programs blocked like Tweetbot and Twitterrific from their API. Users and developers have also She complained of some third-party applications that become unusable.

Since Musk took the reins as CEO of Twitter, he has sought to slash costs and improve monetization.

The billionaire is trying to turn Twitter into a profitable company in a bid to recoup the investment he made with his mammoth $44 billion purchase of the company.

Under his rein, Twitter laid off roughly half of its global workforce and incorporated the verification badge into its Twitter Blue paid subscription product.