A
licenseNot graded
qualityD
maintenanceEnables AI agents to send free and paid faxes to US and Canada numbers, check fax status, and purchase prepaid credits, all without leaving the chat.
MIT
SendFaxFast
Server Details
Send real faxes from AI chat. PDF, JPG or PNG. Pay per fax via Stripe link. US, CA, AU, NZ + 39
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- Status
- Healthy
- Last Tested
- Transport
- Streamable HTTP · MCP 2025-11-25
- URL
TDQS
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Available Tools
6 toolscreate_upload_linkCreate upload linkInspect
Creates a secure one-time upload link (valid 30 minutes) for the fax document (PDF, JPG or PNG, max. 10 MB) – upload from phone or computer by drag & drop, file picker or camera. For files on the user's device, or chat attachments that are not available as send_fax's "file" parameter. The user opens upload_url and uploads the file; send_fax then accepts the returned upload_id. Creating a link sends nothing and costs nothing.
ParametersJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
No parameters | |||
get_account_infoGet subscription infoRead-onlyIdempotentInspect
Get subscription plan details, remaining fax quota, and billing period. Requires your subscription API key (sff_...).
ParametersJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
No parameters | |||
get_fax_priceCheck fax priceRead-onlyIdempotentInspect
Calculate the pay-per-fax price for sending a fax to a specific number. No API key required. Supported: USA, Canada, Australia, New Zealand and 39 more countries (same list as sendfaxfast.com); premium-rate numbers are not supported.
ParametersJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| pages | No | Number of pages in the document (default: 1) | |
| fax_number | Yes | Recipient fax number in E.164 format (e.g. +12125550100 for USA, +61212345678 for Australia, +911123456789 for India) |
get_fax_statusGet fax statusRead-onlyIdempotentInspect
Check the delivery status of a fax. Use token for pay-per-fax orders, fax_id for subscription orders (fax_id requires your API key; only your own faxes are visible).
ParametersJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| token | No | Token returned by send_fax for pay-per-fax orders | |
| fax_id | No | Fax ID returned by send_fax for subscription orders (requires API key) |
list_fax_historyList fax historyRead-onlyIdempotentInspect
List recent faxes sent from this subscription account. Requires your subscription API key (sff_...).
ParametersJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| limit | No | Number of results to return (1–50, default: 10) | |
| offset | No | Pagination offset (default: 0) |
send_faxSend faxDestructiveInspect
Send a PDF document to a fax number. WITHOUT API key: returns a Stripe checkout link (pay-per-fax from $2.49) – the fax is sent after the user pays. WITH a Mini/Flex subscription key (sff_...): sends immediately from the subscription quota. The document must be a direct, publicly accessible HTTPS link to a PDF (max. 10 MB). Supported: USA, Canada, Australia, New Zealand and 39 more countries (same list as sendfaxfast.com); premium-rate numbers are not supported. Each call transmits (or, for pay-per-fax, prepares the checkout for) a real fax to the given number. DOCUMENT (exactly one): "upload_id" from create_upload_link (for files on the user's device), "file" (a file attached in ChatGPT, filled in automatically), "document_url" (direct public HTTPS link to a PDF) or "document_base64" (tiny files only, max. 700 KB). For an attachment that is not available as "file", create_upload_link provides an upload link. The result states whether the fax was sent, scheduled or is awaiting payment.
ParametersJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| file | No | ChatGPT: the fax document the user attached in the chat (PDF, JPG or PNG). Filled in automatically by ChatGPT. | |
| No | Customer email for payment receipt and delivery confirmation (optional for pay-per-fax) | ||
| upload_id | No | upload_id returned by create_upload_link (after the user uploaded the file). One-time use. | |
| fax_number | Yes | Recipient fax number in E.164 format (e.g. +12125550100) | |
| document_url | No | Direct, publicly accessible HTTPS URL of the PDF document to fax (no login or preview pages) Alternative to upload_id / file. | |
| scheduled_at | No | ISO 8601 datetime to schedule the fax (e.g. 2026-10-08T09:00:00-05:00). Leave empty to send immediately. | |
| document_name | No | Optional: original file name of the document (e.g. "invoice.pdf"), shown on the transmission report. Not needed with upload_id or file. | |
| document_base64 | No | Only for very small files (max. 700 KB): the PDF, JPG or PNG as base64 or data: URI. Prefer create_upload_link. |
Tool Schema Changelog
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
6 tool updates
- First observed
create_upload_link - First observed
get_account_info - First observed
get_fax_price - First observed
get_fax_status - First observed
list_fax_history - First observed
send_fax
Related MCP Connectors
Send real faxes from AI chat (DE/AT + 40 countries). PDF, JPG, photo. Pay per fax via Stripe.
41Send real faxes from AI assistants. Pay per fax ($1 + $0.25/page), no account or API key.
Send a fax from Claude, ChatGPT, or Cursor. Upload a PDF, pay, get delivery status.
Send faxes from AI chat with prepaid credits (1 credit = 1 fax, up to 100 pages). PDF, JPG, PNG.
51
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