The request names SendFaxFast, so it comes first: a pay-per-fax web service that sends faxes from a PDF, JPG or PNG with no subscription and a delivery report by email 1. It offers an MCP server for AI agents 1. Alternatives that send faxes via API or MCP are PromptFax Online 2, ClickSend 6 and Edwyna 4.
- 1
SendFaxFastsendfaxfast.comwebsite read, tools not yet checked
Sends a fax online from a PDF, JPG or PNG to a chosen number, paid per fax with no subscription and a delivery report by email 1; it also offers an MCP server for AI agents 1.
official:MCP server · SendFaxFastMCP server · SendFaxFast (AI Fax Credits)
- 2
PromptFax Onlinepromptfax.appverified and signed
Sends a US fax without an account, with a quote and payment step, and is available as an MCP connector; its send_fax action queues a paid fax once payment is authorized 212.
official:MCP server · PromptFax+1 community tools built for it
for agents: send_fax · get_quote · retry_failed_fax
- 3
ClickSendclicksend.comverified and signed
Offers a Send Fax action and a Get Fax History action through its REST API, plus a Calculate Price call for fax pricing 16.
official:MCP server · com.clicksend/clicksend-mcp-serverAPI · ClickSend REST API v3+2 community tools built for it
for agents: Send Fax · Get Fax History · POST /fax/price
- 4
Edwynaedwyna.comwebsite read, tools not yet checked
Provides a fax API for software and AI agents, with a prepaid balance, scoped API keys and a machine-readable record of each fax outcome 4.
official:MCP server · Edwyna Fax API
Sources
- 1Send a Fax Online No Fax Machine, No Account | SendFaxFastsendfaxfast.com · read 2026-10-29
- 2Send a Fax Online Without an Account | PromptFax Onlinepromptfax.app · read 2026-10-29
- 4Send Faxes via API · Edwynaedwyna.com · read 2026-10-29
- 6ClickSend | Business SMS and MMS via Web, Integration or APIclicksend.com · read 2026-10-29
- 12promptfax: declares "send_fax" (the record we read and signed)unfragile.ai · read 2026-10-24
- 16ClickSend REST API v3: declares "Send Fax" (the record we read and signed)unfragile.ai · read 2026-10-24
For agents: the 10 actions behind this answer
· SendFaxFast website read, tools not yet checked
Send a fax online from your phone or computer: upload a PDF, enter the number, pay per fax. No subscription, delivery report by email, refund if it fails.
send_fax · promptfax verified and signed
Queue a paid fax for transmission after payment is authorized and the user explicitly wants to send now.
FetchFax · Twilio - Fax verified and signed
Fetch a specific fax.
· Edwyna website read, tools not yet checked
· Fax Line Index website read, tools not yet checked
5 vendors with a live Fax API product page, median printed entry price $14.99 a month, each figure quoted from the vendor's page.
custom_api_call · Twilio (Activepieces) verified and signed
Custom API Call — Make a custom API call to a specific endpoint
Send Fax · ClickSend REST API v3 verified and signed
Send Fax
custom_api_call · GitHub (Activepieces) verified and signed
Custom API Call — Make a custom API call to a specific endpoint
· AgentBureau website read, tools not yet checked
Send faxes, physical letters and GoBD-compliant invoices, or form a German GmbH — all over a REST API. No subscription, no base fee. Built for AI agents and developers.
Quote a fax · SingleFax verified and signed
Price a fax before sending. Arguments: to (destination fax number, E.164), pages (1-50, default 10) or base64 of a small original document with optional contentType. Read-only: never charges or sends. e.g. {"skill":"quote_fax","arguments":{"to":"+12025551234","pages":3}}
Labels are the instruments' verdict and are never changed by ranking. Agents and robots get this same answer as JSON at /api/v1/find?q=…&answer=1 and through the MCP server.