Meta Muse email signature
Muse is the personal AI agent from Meta. It sends email from the account you connect, after you approve, and ends each email with the signature you give it.
Muse and your email
Muse is rolling out in the US on iOS, Android and muse.ai, and you can also reach it in WhatsApp. It is free for most tasks, with subscription plans for more.
When you connect your email, Gmail in Meta's example, you choose whether Muse only reads your mail or can also send for you. Muse sends from that account, so its emails carry your own signature.
Give Muse your signature
Muse remembers what matters to you, so you give it your signature once.
- Build your signature on Signatoro, free.
- On the signature page, click "Copy as text".
- Tell Muse: "Remember my email signature and end every email you send with it, exactly as written", then paste it.
- Approve the first email Muse sends, then open it in your Gmail Sent folder and check the signature at the bottom.
- When you change your signature on Signatoro, paste the new version to Muse.
Muse asks before it sends
By default, Muse asks for your approval before it sends an email, and you can change when it asks in Muse's Settings. Muse also keeps a full record of what it has done and plans to do.
A custom connector to Signatoro
Meta describes custom connectors for services outside Muse's own list: you ask Muse to create one, it guides you through the setup, which can include the service's API details, and it keeps them in its Secure Credentials Store. Meta leaves the review of a custom connector to you.
Signatoro has an API that returns your current signature for each email, at https://signatoro.com/api/v1/signature, with a key you generate on the signature page under "For tools and assistants". A connector to it would give Muse every change to your signature on its next email. Signatoro will test this route with Muse and update this page with the result.
Meta Muse email signature questions
Can Meta Muse send email for me?
Yes, once you connect your email and let Muse send for you. By default it asks for your approval before each email it sends.
How do I add a signature to emails Muse sends?
Copy your signature as text from Signatoro and tell Muse to end every email with it. Muse remembers it, and you paste a new version when you change it.
Where is Meta Muse available?
Meta is rolling Muse out in the US on iOS, Android and muse.ai, and in WhatsApp.
Sources
Checked against Meta's announcement and help pages on October 11, 2026.