curl --request POST \
  --url https://api.lemlist.com/api/watchlist/crm-lists \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "watchListId": "wl_Example000000001",
  "crmListIds": [
    "clt_Example000000001"
  ]
}
'

import requests

url = "https://api.lemlist.com/api/watchlist/crm-lists"

payload = {
    "watchListId": "wl_Example000000001",
    "crmListIds": ["clt_Example000000001"]
}
headers = {
    "Authorization": "Basic <encoded-value>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Basic <encoded-value>', 'Content-Type': 'application/json'},
  body: JSON.stringify({watchListId: 'wl_Example000000001', crmListIds: ['clt_Example000000001']})
};

fetch('https://api.lemlist.com/api/watchlist/crm-lists', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

require 'uri'
require 'net/http'

url = URI("https://api.lemlist.com/api/watchlist/crm-lists")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Basic <encoded-value>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"watchListId\": \"wl_Example000000001\",\n  \"crmListIds\": [\n    \"clt_Example000000001\"\n  ]\n}"

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

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.lemlist.com/api/watchlist/crm-lists",
  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([
    'watchListId' => 'wl_Example000000001',
    'crmListIds' => [
        'clt_Example000000001'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Basic <encoded-value>",
    "Content-Type: application/json"
  ],
]);

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

curl_close($curl);

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

{
  "data": {
    "_id": "<string>",
    "name": "<string>",
    "type": "companyIsHiring",
    "status": "active",
    "entity": "contact",
    "segmentType": "all",
    "signalProcessingType": "manual",
    "signalOpportunityTemplate": {
      "ownerType": "contact_owner",
      "ownerId": "<string>",
      "type": "email",
      "priority": 0,
      "data": {
        "title": "<string>",
        "subject": "<string>",
        "emailTemplateId": "<string>",
        "message": "<string>"
      }
    },
    "filters": [
      {
        "filterId": "title",
        "in": [
          "<string>"
        ],
        "out": [
          "<string>"
        ]
      }
    ],
    "emoji": "<string>"
  }
}

{
  "error": "No entity of these CRM lists can be monitored: the lists must be your team's and hold the signal's entity, with a domain on each company or a LinkedIn URL on each contact",
  "code": "WATCH_LIST_API_NO_MONITORABLE_ENTITIES"
}

Unauthorized

{
  "error": "Watch list not found",
  "code": "WATCH_LIST_NOT_FOUND"
}

{
  "error": "This watch list already monitors exactly these CRM lists; changes to their content are picked up automatically",
  "code": "WATCH_LIST_API_CRM_LISTS_ALREADY_MONITORED"
}

{
  "error": "This agent has reached its monitoring limit. Stop monitoring some entities before adding more.",
  "code": "WATCH_LIST_MONITOR_MAX_EXCEEDED",
  "details": {
    "monitorMax": 10000
  }
}

Internal server error