This document describes how to send a fax using the PayPerFax.com online fax service.
- 1. Enter the destination fax number and your email address
- 2. Optionally, compose a cover page
- 3. Optionally, attach one or more files
- 4. Click “Preview fax & check price”
- 5. Click “Continue to payment”
- 6. Track your fax on the tracking page
- 7. Receive a confirmation via email
- 8. Start a fax from an AI assistant
This is the basic web faxing form:
1. Enter the destination fax number and your email address
Select the country to which you wish to fax by clicking on the flag. Enter the destination fax number with an area code.
Enter your email address. This address will receive a notification about the fax’s final result (success/failure).
2. Optionally, compose a cover page
Do this by clicking the “Attach a cover page” checkbox. This will open up a set of fields that look like this:
Clicking the “Attach a cover page” checkbox and filling in the fields will cause a first page to be sent ahead of any files you later attach.
3. Optionally, attach one or more files
Click “Choose files” and select a file from your computer. You can do this multiple times. Accepted file types are: pdf, doc(x), tif(f), jp(e)g, png, md (Markdown).
Note
Note that while both steps above say “Optionally”, either an attachment or a cover page must be chosen to be able to proceed and preview a fax.
4. Click “Preview fax & check price”
This will take you to the next page to show you what your fax will look like after our systems have processed your documents and/or cover page. You will also see a price, which is the guaranteed, final price of what it will cost to send your fax to its destination. This is what the preview will look like:
Note
It might take 30-60 seconds to create a fax preview and determine its price.
5. Click “Continue to payment”
This will take you to the following page where you can either pay by entering your credit card details or by clicking through to your PayPal account and approving a payment there.
Note
Your card will not be immediately charged. Instead, a hold will be made in your account for the payment amount. Once your fax completes successfully, the charge will be applied. If the fax fails, the hold will be released from your account, and no charge will be taken.
6. Track your fax on the tracking page
The following screen will appear as long as the fax is in process of being sent:
Once the fax is sent, the screen will change into this:
Note
You don’t actually need to wait around on this screen, as a confirmation email will be sent to you as soon as the fax is complete.
The tracking page also shows a short block titled Track this fax with your AI assistant. It contains a one-line prompt and a copy button. Paste the prompt into an AI assistant that can open web pages, such as ChatGPT, Claude or Gemini. The assistant reads the same tracking page and tells you the current status. To see a later change, ask it to check again. The prompt only lets your assistant read the public status; it cannot cancel, resend or charge you.
7. Receive a confirmation via email
A confirmation will arrive in your email as soon as the fax is done. The email will include full details about the date and time of sending, and the identifier of the receiving end (CSID). The email will also include an attachment of the actual fax for your records.
8. Start a fax from an AI assistant
An AI assistant can also prepare a fax for you. You check it and pay. There is no account to create.
What happens depends on how your assistant works with PayPerFax:
- If your assistant is connected to PayPerFax, it prepares the fax and gives you a link. The link opens the same preview you see when you start a fax on the web form, with the final guaranteed price. You pay in the browser, and then the fax is sent.
- If the assistant cannot upload your file, such as a signed form or a scan, it prepares the fax without the file. The link then opens the fax form, filled in with everything the assistant knows, with a short notice that says “Your AI assistant prepared this fax”. You add the file yourself and continue from step 4 above.
- If your assistant is not connected, ask it to draft the letter as a file (PDF, DOCX or Markdown). Then open the fax form and upload the file, as in steps 1 to 3 above.
This is what the filled-in form looks like:
To connect your assistant: a coding agent such as Claude Code, Codex or Cursor uses the PayPerFax API. An AI assistant that supports MCP connectors uses the PayPerFax MCP server. You add the server once in the assistant’s connector settings, then turn the connector on in the chat where you prepare the fax.
The assistant never pays. PayPerFax sends the fax only after you check it and pay. Every fax goes through the same preview, payment and tracking that this guide describes.