About SingleFax
SingleFax is a pay-per-fax product from Monocube LLC, based in Sheridan, Wyoming. We exist so you can send or receive a fax once — from a browser, an inbox, a backend, or an AI agent — without signing up for a monthly plan.
What we do
Upload a PDF or office document, enter an E.164 fax number, and we deliver it to the destination. Domestic sending starts at $0.99 for up to 10 billable pages, then about $0.08 per extra page (cap 50). Receive uses a dedicated inbound number. Email-to-fax is send@fax.delivery. Agents install MCP at /agents or call the REST API documented at /developers and /openapi.json.
One-time senders use the homepage form with no account. Repeat and company users can keep a lifetime or monthly number. We do not require a subscription to send a single fax. Pricing, coverage, and agent install steps are public so a machine can quote and complete a send without a sales call.
Who we are
SingleFax is operated by Monocube LLC, an independently owned company registered in Wyoming. We do not sell your documents or inject advertising cover sheets. Payments go through Stripe. Support is info@singlefax.com. The same mailbox answers product questions, partnerships, and abuse reports.
Monocube LLC
30 N Gould St Ste R
Sheridan, WY 82801, USA
Healthcare
PHI is not available on MCP, MPP, or the public API. Covered Entities and Business Associates should use HIPAA Secure Mode on the website with an electronic BAA. See HIPAA compliance and privacy.
Talk to us
Product questions, partnerships, and abuse reports go through /contact or /support. Developer and agent onboarding is /developers (same as /agents).