Cancel a Queued Fax with AI

Sent a fax too soon, or to the wrong number? While it is still waiting in the outbox you can add a note to it or cancel it from Claude or ChatGPT with the Fax.Plus MCP connector.

Before you start

• Use an active Fax.Plus Basic plan or higher and an existing authorized Fax.Plus MCP connection.
• Use a compatible client with remote MCP support. These steps use Claude web; interface labels may differ in ChatGPT and other clients.
• MCP is unavailable for accounts with Advanced Security Controls, including HIPAA and PHIPA configurations.
• Act quickly: only a fax that is still waiting in the outbox can be cancelled.

For connection help, see the Fax.Plus MCP setup hub and the client connection guide.

How to cancel a queued fax

1. Open a new chat. Use your connected assistant with Fax.Plus available.
2. Check the outbox. Enter “Is anything waiting to be sent in my outbox?” The tool catalog calls this list-outbox-faxes (list outgoing/queued faxes). This is read-only.
3. Add a note (optional). Ask the assistant to add a comment to the queued fax. It shows the change and asks for your OK (update-outbox-fax: update queued outbox fax; bulk-update-outbox-faxes for several).
4. Cancel the fax. Enter “Cancel my newest queued fax.” The assistant confirms which fax before it cancels (delete-outbox-fax: delete queued outbox fax, marked destructive in the tool catalog).
5. Confirm. Ask the assistant to check the outbox again.

For a queued fax you can add a comment or cancel it. The recipient and the file cannot be changed: to send somewhere else, cancel it and send a new fax.

Before you confirm

Cancelling removes a queued fax and cannot be undone, and it only works while the fax is still in the outbox. A fax that is already sending or delivered cannot be taken back. Check which fax the assistant names, and keep the Fax.Plus outbox tools on Needs approval so nothing is cancelled without your OK.

Example prompts

Copy a prompt into your connected assistant and replace the text in brackets.

Understand the result

A queued fax shows as preparing or sending. If the outbox is empty, the fax has already left it and is in your sent faxes, so it can no longer be cancelled; ask the assistant for its status instead. After a cancellation, a fresh check of the outbox shows the fax is gone.

If a tool is unavailable or reports a failure, the action did not run; check the connection and the account before trying again.

Keep recipient numbers out of shared screenshots and summaries.

Related setup and next steps

Explore the MCP setup hub and the official Outbox tool catalog. Related: check fax delivery.