Meta is opening Muse connector development to third-party developers, Mark Zuckerberg said in a post on X. Meta introduced the personal AI agent on September 8.
Zuckerberg said developers bring the API, while Muse supplies the agent, browser and context of what a person wants. That could allow people to reach a service by asking their agent for it.
When Muse launched, its connectors for Gmail, Google Calendar, Spotify and OpenTable were primarily built by Meta, according to a report on the launch. The new program opens that work to outside developers.
One secondary report names Notion and meeting-notes tool Granola as the first third-party-built connectors.
Notion, founded in 2013 by Ivan Zhao and Akshay Kothari, makes workspace software that combines notes, tasks, databases and AI agent features. More than one million Custom Agents were built by users within two months of its February 2026 launch, according to Sacra.
Granola was founded in London in 2023 by Chris Pedregal and Sam Stephenson. Its meeting-notes app runs locally on a user's computer, transcribes audio and combines it with a user's notes to produce structured meeting notes.
Meta's Help Center says Muse connectors can give the agent access to apps and services from Meta or third parties. It distinguishes pre-built third-party connectors from custom connectors requested by users, and says Meta does not review custom connectors or how they use information.
As Go Big News reported, Meta introduced Muse on September 8.
