How to use Meta Muse for real-world errands

Meta Muse writes the letter. It cannot put it in a mailbox. These guides cover everything on the other side of that gap: posting paper, sending faxes, booking appointments, and the plain-language background on keys, prices and custom connectors.

Every guide uses the same one-paste setup, so if you have done it once you can skip straight to the asking. United States only.

Send something

• How to send a real letter with Meta Muse -- the main one. A printed, stamped letter from $2.49.
• How to send a real postcard with Meta Muse -- a card with your photo on the front, $1.49.
• How to send certified mail with Meta Muse -- the post office errand, without the post office. $9.99 for one page.
• How to send a fax with Meta Muse -- no machine and no phone line, from $1.49.
• How to book an appointment with Meta Muse -- a real slot in a real calendar, free for you.

Things people actually want to post

• Mail a letter to your landlord or utility -- notice, cancellations and billing disputes, where paper is still compulsory.
• Send a thank-you postcard from a photo -- a photo on the front and a handwriting-style message on the back.

Understand what you are doing

• What Meta Muse cannot do natively -- a dated list of the gaps, including the ones no connector fixes.
• How Meta Muse custom connectors work and how safe they are -- what Meta checks, what it does not, and what can still go wrong.
• How to give Meta Muse an API key safely -- the Secure Credentials Store in plain words, and how to take the key back.
• Meta Muse connectors list -- our sourced reconstruction, because Meta has not published one.
• What it costs to mail things with Meta Muse -- every price, how credits work, and what Meta charges separately.

The one-paste setup

Get a key at https://noerrands.com/get-key, then copy the whole block and paste it into Muse as one message. You do this once and it covers mail, fax and bookings.

Build a custom connector for No Errands. One API key covers three services:
printed mail (letters and postcards), fax, and appointment booking.

1. Read these three connector briefs and follow them exactly:
   https://noerrands.com/connectors/muse.md
   https://noerrands.com/connectors/fax/muse.md
   https://noerrands.com/connectors/booking/muse.md

2. Store my API key in the Secure Credentials Store as NOERRANDS_API_KEY.
   The same key works for all three. Never print, log, echo, or repeat it,
   not even partially.
   Send it as the header: Authorization: Bearer <NOERRANDS_API_KEY>

3. Prefer the MCP endpoints (streamable HTTP):
   https://api.noerrands.com/c/mail/mcp
   https://api.noerrands.com/c/fax/mcp
   https://api.noerrands.com/c/booking/mcp
   If you use the REST APIs instead, each brief links its OpenAPI document.

4. Before you mail anything, fax anything, or book anything, show me exactly
   what will happen, what it costs, and who it goes to, and wait for my
   explicit approval. Never act without asking me first.

5. Save this as a reusable skill called "Mail, fax and bookings".

Plain text version: /muse-prompt.txt. Then see full pricing or add credits.