Connectors

Muse Custom Connectors: connecting apps Muse doesn’t support yet

Muse has around 54 built-in connectors. For anything else, Meta lets Muse build a Custom Connector to the service’s API. It’s powerful, it isn’t reviewed by Meta, and it isn’t where you’d expect to find it. Here’s how it works.

By Published Facts checked 2026-10-02

Quick answer

A Custom Connector lets Muse work with a service that isn’t in its connector list. You don’t add one in Settings: you ask Muse in chat to create it, and Muse walks you through getting the service’s API details. Muse stores the keys in its secure credentials store. The big caveat, in Meta’s words: Meta “doesn’t review custom connectors or how they use your information,” so connect only services you trust, and give the narrowest access possible.

How we checked

TestedOn October 2, 2026, we checked Settings → Connectors on our own account (muse.ai web app): there’s no option there to add a custom connector. We haven’t asked Muse to build one, so the chat flow is described from Meta’s Help Center. See how we label evidence.

What a Custom Connector is

Per MetaMeta’s Help Center says: “If you want to connect to a service not yet available in the Connector list, you can ask Muse to create a Custom Connector.” Muse “will guide you through the process, which can involve retrieving API information from the service,” and stores those credentials in its Secure Credentials Store.1

In practice, that means the service needs an API (a way for software to talk to it), and you’ll usually create an API key or token in that service’s own settings. Meta’s launch materials add that, for a service with no API at all, Muse can use it “through a browser the way you would,” which is a different route with its own risks.3

Where it is, and isn’t, in the app

TestedSettings → Connectors has no “add custom connector” option. The screen lists your connected apps, then available ones, with a search box. Searching “custom” returned only Shopify and Stripe. That matches Meta’s instructions: custom connectors start in the chat, not in Settings.

How to set one up safely

  1. Check the list firstSearch Settings → Connectors, or our connectors tracker. A built-in connector is the safer choice when one exists.
  2. Ask MuseFor example: “Create a custom connector for [service].” Muse explains what it needs.1
  3. Create a limited keyIn the service’s own settings, create an API key with the fewest permissions that do the job (read-only if you can), and give it an expiry date if the service allows.
  4. Share it only with MuseGive the key to Muse when it asks, so it goes into the secure store; don’t paste keys into other chats or documents.2
  5. Keep approvals onSet Settings → Permissions to “Always ask” so Muse checks with you before acting through the new connector. How.

The risks Meta flags, and a few more

  • Per MetaNo review by Meta. Meta “doesn’t review custom connectors or how they use your information, so grant access with caution and review the provider’s privacy policies.”1
  • Over-broad keys. A full-access key lets Muse, or anyone who abuses it, do everything that key can do. Keep scopes narrow.
  • Prompt injection. Content that comes back from a connected service can contain hidden instructions. Meta admits prompt injection is an unsolved problem. More.
  • Other people’s data. If the service holds customer or employee data, you’re giving an AI agent access to it.
  • Your responsibility. Muse’s terms make you responsible for configuring connected services and their permissions, and for following each service’s terms and policies.4

How to remove one

Per MetaYou can disconnect any connector “at any time in Settings under Connectors.”1 Also revoke the API key in the service itself, because that’s where the access really lives. To clear what Muse learned from it, see editing Muse’s memory.

Sources

  1. How Muse works with Connectors Meta Help Center · checked Oct 2, 2026
  2. How Muse handles your privacy, safety and security Meta Help Center
  3. Amazon blocks Meta’s Muse AI assistant (quoting Meta’s launch materials) GeekWire · Sept 21, 2026
  4. Muse Supplemental Terms of Service Meta · last updated Sept 8, 2026

Last checked in the app: 2026-10-02. Spotted a change? Tell us.

Frequently asked questions

How do I add a custom connector in Muse?

Ask Muse in chat to create one for the service you want. Meta says Muse will guide you through it, which can involve getting API information from that service. There’s no “add custom connector” button in Settings → Connectors; we checked on October 2, 2026.1

Does Meta check custom connectors?

No. Meta says it “doesn’t review custom connectors or how they use your information,” and advises granting access with caution and reading the provider’s privacy policy.1

Where does Muse keep the API key for a custom connector?

In its Secure Credentials Store, according to Meta, which says the AI model doesn’t see stored credentials directly.12

How do I remove a custom connector?

Meta says you can disconnect connectors at any time in Settings → Connectors. It’s also wise to revoke the API key in the service itself, since that’s where the access was granted.1