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, Word, Excel, PowerPoint, RTF, plain text, or image. We convert to PDF before sending. Domestic sending starts at $0.99 for up to 10 billable pages, then about $0.08 per extra page (cap 100). Receive uses a dedicated fax 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 add third-party ads to your fax. SingleFax-generated cover pages include SingleFax branding. If your fax already includes your own cover page, or you upload a separate cover file, we add no additional SingleFax branding. 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 onboarding is /developers (REST, CLI, language examples). Chat agents install MCP at /agents.