Send a fax

curl --request POST \
  --url https://api.amplify.xyz/v1/faxes/send \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "fax_number": "+12509997881",
  "fax_data": [
    {
      "file_name": "document.pdf",
      "file_url": "https://example.com/document.pdf"
    }
  ]
}
'

import requests

url = "https://api.amplify.xyz/v1/faxes/send"

payload = {
    "fax_number": "+12509997881",
    "fax_data": [
        {
            "file_name": "document.pdf",
            "file_url": "https://example.com/document.pdf"
        }
    ]
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    fax_number: '+12509997881',
    fax_data: [{file_name: 'document.pdf', file_url: 'https://example.com/document.pdf'}]
  })
};

fetch('https://api.amplify.xyz/v1/faxes/send', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.amplify.xyz/v1/faxes/send",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'fax_number' => '+12509997881',
    'fax_data' => [
        [
                'file_name' => 'document.pdf',
                'file_url' => 'https://example.com/document.pdf'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.amplify.xyz/v1/faxes/send"

	payload := strings.NewReader("{\n  \"fax_number\": \"+12509997881\",\n  \"fax_data\": [\n    {\n      \"file_name\": \"document.pdf\",\n      \"file_url\": \"https://example.com/document.pdf\"\n    }\n  ]\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.amplify.xyz/v1/faxes/send")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"fax_number\": \"+12509997881\",\n  \"fax_data\": [\n    {\n      \"file_name\": \"document.pdf\",\n      \"file_url\": \"https://example.com/document.pdf\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.amplify.xyz/v1/faxes/send")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"fax_number\": \"+12509997881\",\n  \"fax_data\": [\n    {\n      \"file_name\": \"document.pdf\",\n      \"file_url\": \"https://example.com/document.pdf\"\n    }\n  ]\n}"

response = http.request(request)
puts response.read_body

{
  "status": 1,
  "message": "Fax processed for sending",
  "data": {
    "job_id": "01M1NMGG0WY0THD0YA3ZWN9WY7"
  }
}

{
  "status": 401,
  "message": "UNAUTHORIZED",
  "data": "Token expired"
}

POST

faxes

send

Send a fax

curl --request POST \
  --url https://api.amplify.xyz/v1/faxes/send \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "fax_number": "+12509997881",
  "fax_data": [
    {
      "file_name": "document.pdf",
      "file_url": "https://example.com/document.pdf"
    }
  ]
}
'

import requests

url = "https://api.amplify.xyz/v1/faxes/send"

payload = {
    "fax_number": "+12509997881",
    "fax_data": [
        {
            "file_name": "document.pdf",
            "file_url": "https://example.com/document.pdf"
        }
    ]
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    fax_number: '+12509997881',
    fax_data: [{file_name: 'document.pdf', file_url: 'https://example.com/document.pdf'}]
  })
};

fetch('https://api.amplify.xyz/v1/faxes/send', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.amplify.xyz/v1/faxes/send",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'fax_number' => '+12509997881',
    'fax_data' => [
        [
                'file_name' => 'document.pdf',
                'file_url' => 'https://example.com/document.pdf'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.amplify.xyz/v1/faxes/send"

	payload := strings.NewReader("{\n  \"fax_number\": \"+12509997881\",\n  \"fax_data\": [\n    {\n      \"file_name\": \"document.pdf\",\n      \"file_url\": \"https://example.com/document.pdf\"\n    }\n  ]\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.amplify.xyz/v1/faxes/send")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"fax_number\": \"+12509997881\",\n  \"fax_data\": [\n    {\n      \"file_name\": \"document.pdf\",\n      \"file_url\": \"https://example.com/document.pdf\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.amplify.xyz/v1/faxes/send")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"fax_number\": \"+12509997881\",\n  \"fax_data\": [\n    {\n      \"file_name\": \"document.pdf\",\n      \"file_url\": \"https://example.com/document.pdf\"\n    }\n  ]\n}"

response = http.request(request)
puts response.read_body

{
  "status": 1,
  "message": "Fax processed for sending",
  "data": {
    "job_id": "01M1NMGG0WY0THD0YA3ZWN9WY7"
  }
}

{
  "status": 401,
  "message": "UNAUTHORIZED",
  "data": "Token expired"
}

Send a fax to a destination number. Authenticate with a Bearer access token obtained from Generate an access token.

Attach documents

Send the request as application/json. The fax_data property is an array of document objects. For each document, provide file_name and one of:

file_url: A publicly accessible URL for the PDF file.
file_data: The complete PDF file encoded as a Base64 string.

Do not include both file_url and file_data for the same document.

Fax templates

Use template_id to apply a Fax Default as the cover-page template. Customers can find the ID beneath the Fax Default name under Settings → iFax Settings → Fax Defaults. Use smart_document_id to apply a Smart Template. Customers can find the ID beneath the Smart Template name under Settings → iFax Settings → Smart Templates. template_id and smart_document_id cannot be used together. The fax_data array is always required with either option.

Phone number format

Supply fax_number and caller_id in E.164 format. Begin the number with +, followed by the country code and subscriber number, with no spaces, parentheses, or hyphens.

+12509997881

Fax quality

Set fax_quality to one of the following values:

Value	Quality
`low`	Low
`standard`	Standard
`hd`	High definition

If omitted, fax quality comes from the selected Fax Default. When template_id is omitted, the account’s default Fax Default is used.

Fax priority

Set fax_priority to high or regular. The default is regular.

Caller ID

Supply caller_id to select the sending number explicitly. If omitted, caller ID comes from the selected Fax Default. When template_id is omitted, the fax_as value from the account’s default Fax Default is used.

Scheduling

Use scheduled_date to schedule transmission. Supply timestamps in ISO 8601 format, such as 2026-05-06T09:42:00Z.

Authorizations

Authorization

string

header

required

Bearer authentication header of the form Bearer <token>, where <token> is your auth token.

Body

application/json

fax_number

string

required

Destination fax number in E.164 format.

Pattern: ^\+[1-9][0-9]{1,14}$

Example:

"+12509997881"

fax_data

object[]

required

Documents to include in the fax.

Minimum array length: 1

Option 1
Option 2

Show child attributes

caller_id

string

Caller ID or sending fax number in E.164 format. When omitted, the value comes from the selected Fax Default or the account's default Fax Default.

Pattern: ^\+[1-9][0-9]{1,14}$

Example:

"+12513120176"

template_id

string

ID of a Fax Default used as the cover-page template. Find it under Settings > iFax Settings > Fax Defaults. Cannot be combined with smart_document_id.

Example:

"1055"

is_required_approval

boolean

Whether the fax requires approval before it is sent.

Example:

false

fax_priority

enum<string>

default:regular

Fax priority.

Available options:

high,

regular

Example:

"high"

smart_document_id

string

ID of a Smart Template. Find it under Settings > iFax Settings > Smart Templates. Cannot be combined with template_id.

Example:

"10210"

subject

string

Fax subject.

Example:

"Test Subject"

from_name

string

Sender name.

Example:

"Sender Name"

to_name

string

Recipient name.

Example:

"Recipient Name"

message

string

Message associated with the fax.

Example:

"Fax sent through the Amplify API"

scheduled_date

string<date-time>

Scheduled transmission date and time in ISO 8601 format.

Example:

"2026-05-06T09:42:00Z"

fax_quality

enum<string>

Requested fax quality. When omitted, the value comes from the selected Fax Default or the account's default Fax Default.

Available options:

low,

standard,

hd

Example:

"hd"

Response

Fax processed for sending.

status

integer

required

message

string

required

Allowed value: "Fax processed for sending"

data

object

required

Show child attributes

Introduction

Guides

Webhooks

Authentication

Faxes

Workspace

Numbers

Contacts

Documents

Templates

Send a fax

Attach documents

Fax templates

Phone number format

Fax quality

Fax priority

Caller ID

Scheduling

Authorizations

Body

Response

​Attach documents

​Fax templates

​Phone number format

​Fax quality

​Fax priority

​Caller ID

​Scheduling

Authorizations

Body

Response

Attach documents

Fax templates

Phone number format

Fax quality

Fax priority

Caller ID

Scheduling