FaxOnline

Prepare one PDF fax and return its price and Stripe checkout link. This stores the document but does not send or charge. Completing checkout authorizes sending to the displayed recipient. Keep draft_token private and reuse it with identical inputs for retries.

{
  "type": "object",
  "properties": {
    "draft_token": {
      "description": "A secret, cryptographically random 64-character lowercase hex token. Reuse for retries and status checks.",
      "type": "string"
    },
    "fax_number": {
      "description": "US destination fax number: 10 digits (5155551234), optionally prefixed with 1 or +1 (+15155551234). Common formatting such as (515) 555-1234 is accepted.",
      "type": "string"
    },
    "email": {
      "description": "Email address for delivery notifications.",
      "type": "string"
    },
    "filename": {
      "description": "PDF filename without directory paths.",
      "type": "string"
    },
    "document_base64": {
      "description": "Standard base64 of the PDF bytes, without a data URL prefix; maximum decoded size 10 MiB.",
      "type": "string"
    }
  },
  "required": [
    "draft_token",
    "fax_number",
    "email",
    "filename",
    "document_base64"
  ]
}

Check your prepared fax using its secret draft_token. Returns payment and delivery status. A processing fax has not yet been delivered. Poll no more than once every 15 seconds.

{
  "type": "object",
  "properties": {
    "draft_token": {
      "description": "The private token used in prepare_fax.",
      "type": "string"
    }
  },
  "required": [
    "draft_token"
  ]
}