curl --request POST \
  --url https://brew.new/api/v1/sends/{sendId}/cancel \
  --header 'Authorization: Bearer <token>'

import requests

url = "https://brew.new/api/v1/sends/{sendId}/cancel"

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

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

print(response.text)

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

fetch('https://brew.new/api/v1/sends/{sendId}/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://brew.new/api/v1/sends/{sendId}/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://brew.new/api/v1/sends/{sendId}/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://brew.new/api/v1/sends/{sendId}/cancel")
  .header("Authorization", "Bearer <token>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://brew.new/api/v1/sends/{sendId}/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

{
  "sendId": "snd_8fK2mQ4p",
  "status": "canceled"
}

{
  "error": {
    "code": "INVALID_API_KEY",
    "type": "authentication_error",
    "message": "The provided API key is invalid.",
    "suggestion": "Check the API key format and retry with a valid active key.",
    "docs": "https://docs.brew.new/api-reference/api/authentication"
  }
}

{
  "error": {
    "code": "INSUFFICIENT_PERMISSIONS",
    "type": "authorization_error",
    "message": "The caller does not have the required permission.",
    "suggestion": "Use an API key or session with the required permission.",
    "docs": "https://docs.brew.new/api-reference/api/authentication",
    "param": "sends"
  }
}

{
  "error": {
    "code": "SEND_NOT_FOUND",
    "type": "not_found",
    "message": "No send was found with id 'snd_xxx'.",
    "suggestion": "List sends with GET /v1/analytics/sends, or start one with POST /v1/sends.",
    "docs": "https://docs.brew.new/api-reference/api/errors",
    "param": "sendId"
  }
}

{
  "error": {
    "code": "SEND_NOT_CANCELLABLE",
    "type": "conflict",
    "message": "Send 'snd_x' is 'sent' and can no longer be canceled — only campaign sends that are 'scheduled', 'queued', 'sending', or 'paused' can be canceled.",
    "suggestion": "Check the send status via GET /v1/analytics/sends?sendId=… before canceling.",
    "docs": "https://docs.brew.new/api-reference/api/errors",
    "param": "sendId"
  }
}

{
  "error": {
    "code": "RATE_LIMITED",
    "type": "rate_limit",
    "message": "Too many requests.",
    "suggestion": "Wait for the retry window before sending another request.",
    "docs": "https://docs.brew.new/api-reference/api/rate-limits",
    "retryAfter": 42
  }
}

{
  "error": {
    "code": "INTERNAL_ERROR",
    "type": "internal_error",
    "message": "An unexpected error occurred.",
    "suggestion": "Retry the request. If it keeps failing, contact support.",
    "docs": "https://docs.brew.new/api-reference/api/errors"
  }
}