curl --request POST \
  --url https://api.reply.io/v3/direct-sends/{reference}/cancel \
  --header 'Authorization: Bearer <token>'

import requests

url = "https://api.reply.io/v3/direct-sends/{reference}/cancel"

headers = {"Authorization": "Bearer <token>"}

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

print(response.text)

const options = {method: 'POST', headers: {Authorization: 'Bearer <token>'}};

fetch('https://api.reply.io/v3/direct-sends/{reference}/cancel', 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.reply.io/v3/direct-sends/{reference}/cancel",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>"
  ],
]);

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

curl_close($curl);

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

package main

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

func main() {

	url := "https://api.reply.io/v3/direct-sends/{reference}/cancel"

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

	req.Header.Add("Authorization", "Bearer <token>")

	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.reply.io/v3/direct-sends/{reference}/cancel")
  .header("Authorization", "Bearer <token>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.reply.io/v3/direct-sends/{reference}/cancel")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'

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

{
  "reference": "email-48213",
  "channel": "email",
  "contactId": 42,
  "state": "cancelled",
  "sendAfter": "2026-11-20T09:00:00Z",
  "estimatedSendAt": null,
  "sentAt": null,
  "messageId": null,
  "failureCode": null,
  "failureReason": null,
  "missingVariables": null,
  "renderedSubject": null,
  "renderedBody": null,
  "cancelledAt": "2026-11-19T16:12:03Z"
}

{
  "title": "Unauthorized",
  "status": 401,
  "detail": "Authentication credentials are missing or invalid."
}

{
  "title": "Forbidden",
  "status": 403,
  "detail": "The send belongs to a teammate you cannot act for.",
  "code": "directSend.notOwned"
}

{
  "title": "Not Found",
  "status": 404,
  "detail": "The send was not found.",
  "code": "directSend.notFound"
}

{
  "title": "Conflict",
  "status": 409,
  "detail": "The send has already gone out or is going out right now.",
  "code": "directSend.alreadySent"
}

{
  "title": "Too Many Requests",
  "status": 429,
  "detail": "API calls quota exceeded! maximum admitted 100 per 1m."
}

{
  "title": "Service Unavailable",
  "status": 503,
  "detail": "The cancel could not be confirmed and the send is still queued; retry it.",
  "code": "directSend.cancelNotConfirmed"
}