curl --request POST \
  --url https://client-api.salesfinity.co/v2/sequencer/enrollment-runs/{run_id}/cancel \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "user_id": "507f1f77bcf86cd799439011"
}
'

import requests

url = "https://client-api.salesfinity.co/v2/sequencer/enrollment-runs/{run_id}/cancel"

payload = { "user_id": "507f1f77bcf86cd799439011" }
headers = {
    "x-api-key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'x-api-key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({user_id: '507f1f77bcf86cd799439011'})
};

fetch('https://client-api.salesfinity.co/v2/sequencer/enrollment-runs/{run_id}/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://client-api.salesfinity.co/v2/sequencer/enrollment-runs/{run_id}/cancel",
  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([
    'user_id' => '507f1f77bcf86cd799439011'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "x-api-key: <api-key>"
  ],
]);

$response = curl_exec($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://client-api.salesfinity.co/v2/sequencer/enrollment-runs/{run_id}/cancel"

	payload := strings.NewReader("{\n  \"user_id\": \"507f1f77bcf86cd799439011\"\n}")

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

	req.Header.Add("x-api-key", "<api-key>")
	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://client-api.salesfinity.co/v2/sequencer/enrollment-runs/{run_id}/cancel")
  .header("x-api-key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"user_id\": \"507f1f77bcf86cd799439011\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://client-api.salesfinity.co/v2/sequencer/enrollment-runs/{run_id}/cancel")

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

request = Net::HTTP::Post.new(url)
request["x-api-key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"user_id\": \"507f1f77bcf86cd799439011\"\n}"

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

{
  "run_id": "enroll_9c1f4e2a7b3d5c6e8f0a1b2c",
  "sequence": "66fd0e5a9b8c7d6e5f4a3b21",
  "status": "running",
  "source": {
    "kind": "contact_list",
    "contact_list": "66f0c1d2e3f4a5b6c7d8e9f0",
    "label": "Q4 fintech CFOs"
  },
  "total": 3400,
  "processed": 1210,
  "enrolled": 1180,
  "skipped_count": 30,
  "held_count": 4,
  "truncated": false,
  "sample_skipped": [
    {
      "prospect": "[email protected]",
      "reason": "Contact is already enrolled in this sequence"
    }
  ],
  "cancel_requested": true,
  "created_at": "2026-10-03T14:02:11.482Z"
}

{
  "message": [
    "user_id must be object id"
  ],
  "error": "Bad Request",
  "statusCode": 400,
  "request_id": "0f6d3c52-9f3e-4c1a-a4b8-2b1f7e5d9c10"
}

{
  "message": "Forbidden resource",
  "error": "Forbidden",
  "statusCode": 403,
  "request_id": "0f6d3c52-9f3e-4c1a-a4b8-2b1f7e5d9c10"
}

{
  "message": "Enrollment run not found",
  "error": "Not Found",
  "statusCode": 404,
  "request_id": "0f6d3c52-9f3e-4c1a-a4b8-2b1f7e5d9c10"
}

{
  "message": "This Idempotency-Key was already used with a different request body.",
  "error": "Conflict",
  "statusCode": 409,
  "request_id": "0f6d3c52-9f3e-4c1a-a4b8-2b1f7e5d9c10"
}

{
  "message": "Rate limit of 300 requests per minute exceeded. Retry in 12s.",
  "error": "Too Many Requests",
  "statusCode": 429,
  "request_id": "0f6d3c52-9f3e-4c1a-a4b8-2b1f7e5d9c10"
}

{
  "message": "Internal server error",
  "error": "Internal Server Error",
  "statusCode": 500,
  "request_id": "0f6d3c52-9f3e-4c1a-a4b8-2b1f7e5d9c10"
}

{
  "message": "Sequencer service unreachable",
  "error": "Bad Gateway",
  "statusCode": 502,
  "request_id": "0f6d3c52-9f3e-4c1a-a4b8-2b1f7e5d9c10"
}

{
  "message": "Sequencer service timed out",
  "error": "Gateway Timeout",
  "statusCode": 504,
  "request_id": "0f6d3c52-9f3e-4c1a-a4b8-2b1f7e5d9c10"
}