Muse Connectors: how Meta is opening its agent to any business

Meta opened Muse Connectors to outside developers, and in under a week it received 1,500 requests to build connectors. A connector is what lets Muse, Meta's personal agent, read an inventory, charge a payment, or book something without the user opening a single tab.

What Muse is and why it already matters

Muse launched on September 8, 2026, and in two weeks went from zero to 3.4 million downloads, according to Sensor Tower, growing 55% day-over-day at launch (ChatGPT, for comparison, grew 24%). On September 18 it hit #1 on the US App Store, and the next day #1 on Google Play. Behind it runs Meta's own model, Muse Spark 1.3, trained to sustain long, multi-step tasks.

The five announcements from Meta Connect 2026

At its Connect event, Meta announced five things at once: a real-time video avatar, Mac desktop control, its own email address for forwarding tasks, integration with smart glasses, and an open platform for building connectors. Partners already on board include GitHub, Notion, Instacart, and the payment chain with Shopify, Stripe, Shop Pay, and PayPal.

The two paths to building a connector

The first path is the directory connector: published for every Muse user, it goes through Meta's review (security, functionality, and legal), and once approved shows up in Settings for anyone to enable. The process lives at muse.ai/platform: describe the product, provide a public OpenAPI document or an MCP server, and confirm. The second path is the custom connector: built by Muse for a single user, with no Meta approval, storing credentials in a secure vault — it's a service a freelancer can charge to set up, not a product resold to many.

Where the money comes from

Zuckerberg confirmed Meta charges a percentage of the purchase volume Muse closes, and that fee comes out of the merchant's side, not the user's — though the exact percentage isn't public yet. Muse's subscription runs $20 to $100 a month depending on the plan, and the Muse Spark model costs $1.25 per million input tokens: testing a full connector flow costs cents, not an enterprise contract.

The precedent: the 2008 App Store

When Apple opened its app store in 2008, it started with 500 apps and ended the year with 10,000. Those who got in first, with no competition yet, captured users who would be impossible to win today — though many of those early apps disappeared once Apple changed its commission rules two years later. Getting in early gives an edge, not immunity.

Who this doesn't serve yet

If your API doesn't have a public OpenAPI document or you can't expose an MCP server, you don't qualify for the directory today. If your business operates outside the US and Canada, where Muse isn't available yet, a connector has no one to serve yet. And if your revenue depends on the customer browsing your site and seeing ads along the way, a connector removes the user from your interface entirely.

The real risks

The custom connector stores your API keys inside Muse without Meta's review: if that user shares their account, they also share access to your system. Meta also hasn't published how long directory connector review takes or how many it rejects. And if a document describes a function incorrectly, Muse will try to use it anyway, and the error lands on the end customer.

How to apply it in your business?

If you already have a working API, this week's task is checking whether it has a public OpenAPI document — that documentation, not the form, is the real barrier for most small businesses. If you're a freelancer, the custom connector is a service you can offer today to a client who already uses Muse, with no approval needed from anyone; just put in writing exactly what the connector does and what happens if Meta changes the commission later.

For the fuller picture of where Muse is headed as a consumer product, here's the other angle: 3 things Meta Muse will do on your smart glasses.

Frequently asked questions

What is a Muse connector?

It's what lets Muse read an inventory, charge a payment, or complete a booking with an external service without the user leaving the chat.

How much does Meta charge for Muse Connectors?

A percentage of the purchase volume Muse closes, paid by the merchant, not the user — the exact percentage isn't public yet.

Do I need Meta's approval to build a connector?

Only for the directory connector (visible to every user). The custom connector, for a single client, doesn't require approval.

How much does it cost to test a Muse connector?

The Muse Spark model costs $1.25 per million input tokens; testing a full flow costs cents.

Does Muse Connectors work outside the US?

Not confirmed. Muse is currently only available in the US and Canada.

Conclusion

Muse Connectors opened the door for any business with a documented API, or any freelancer, to build a sales channel inside Meta's agent — with 1,500 requests already in line, the real edge is getting in while that line is still short, not having the most sophisticated technology.