Common questions about sending a fax

Direct answers to common questions about sending a fax online.

• What is the cheapest way to fax a PDF? — For a short fax, free allowances and Dropbox Fax ($0.99 for up to 10 pages) or WiseFax ($1.00 per page) cost the least if you have an account; Oh Fax is $2.00 for any fax up to 100 pages with no account.
• Can an AI agent send a fax? — Yes: Oh Fax has a remote MCP server at https://app.ohfax.com/mcp and a REST API, so Claude, ChatGPT, Cursor, Codex and other agents can quote and send a fax to the US or Canada.
• How do I fax a file from Google Drive or Gmail? — Download the file or email as a PDF, then upload that PDF at app.ohfax.com and pay $2.00 to fax it to a US or Canadian number; Oh Fax does not connect to Google Drive or Gmail directly.
• How do I fax from my computer without a fax machine or phone line? — Use an online fax service in your web browser: at app.ohfax.com you upload a PDF, enter a US or Canadian fax number and pay $2.00, and the fax is sent over the phone network for you.
• How do I send a fax from my iPhone or Android phone? — Open app.ohfax.com in your phone's browser, choose a PDF from your files, enter a US or Canadian fax number and pay $2.00; there is no app to install.
• How do I send one fax online without a subscription? — Upload the PDF at app.ohfax.com, enter a US or Canadian fax number, and pay $2.00 by card for that one fax, with no account and no monthly plan.
• How long does an online fax take, and how do I know it went through? — A fax sent with Oh Fax normally arrives within minutes, and the status page shows when it is delivered and gives you a receipt; if it fails, you are told why and refunded.
• Is online fax secure? — Oh Fax encrypts documents in transit and at rest and deletes them 24 hours after the fax finishes, but fax lines themselves are not encrypted end to end and Oh Fax is not for patient data (PHI).