This script shows Ad Account creation limit for all Business Managers

showbmadacclimit.js

var bms = await getAllBms();
for (let i = 0; i < bms.data.length; i++) {
  let bm = bms.data[i];
  console.log(
    `%cProcessing BM: ${bm.name}`,
    "font-size:15px;font-weight:bold;"
  );
  console.log(`Ad Account creation limit is: ${await getBMAdAccountCreationLimit(bm.id)}`);
}

async function getAllBms() {
  return await publicApiRequest(
    "me/businesses",
    "fields=id,name,is_disabled_for_integrity_reasons"
  );
}

async function getBMAdAccountCreationLimit(bmId){
  let uid = require("CurrentUserInitialData").USER_ID;
  let dtsg = require("DTSGInitialData").token;
  let lsd = require("LSD").token;
  let body = `__user=${uid}&__a=1&fb_dtsg=${dtsg}&lsd=${lsd}`;
  let curUrl = window.location.href;
  let subDomain = curUrl.includes("/business.") ? "business" : "www";
  let js = await privateApiRequest2(body,null,`https://${subDomain}.facebook.com/business/adaccount/limits/?business_id=${bmId}`);
  return js.payload.adAccountLimit;
}

async function privateApiRequest2(body, headers = null, url = null) {
  let graphUrl = "";
  if (url != null) graphUrl = url;
  else {
    let curUrl = window.location.href;
    let subDomain = curUrl.includes("business") ? "business" : "www";
    graphUrl = `https://${subDomain}.facebook.com/api/graphql/`;
  }

  headers = headers ?? {
    accept: "*/*",
    "accept-language": "ca-ES,ca;q=0.9,en-US;q=0.8,en;q=0.7",
    "content-type": "application/x-www-form-urlencoded",
    "sec-ch-ua":
      '"Not?A_Brand";v="8", "Chromium";v="108", "Google Chrome";v="108"',
    "sec-ch-ua-mobile": "?0",
    "sec-ch-ua-platform": '"Windows"',
    "sec-fetch-dest": "empty",
    "sec-fetch-mode": "cors",
    "sec-fetch-site": "same-origin",
    "x-fb-lsd": require("LSD").token,
  };

  let f = await fetch(graphUrl, {
    headers: headers,
    body: body,
    method: "POST",
    mode: "cors",
    credentials: "include",
  });
  let t = await f.text();
  if (t.startsWith("for (;;);"))
    t = t.substring(9);
  return JSON.parse(t);
}

async function publicApiRequest(path, qs, token = null) {
  token = token ?? __accessToken;
  let f = await fetch(
    `https://graph.facebook.com/v14.0/${path}?${qs}&access_token=${token}`,
    {
      headers: {
        accept:
          "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9",
        "accept-language": "ca-ES,ca;q=0.9,en-US;q=0.8,en;q=0.7",
        "cache-control": "max-age=0",
        "sec-ch-ua":
          '"Not?A_Brand";v="8", "Chromium";v="108", "Google Chrome";v="108"',
        "sec-ch-ua-mobile": "?0",
        "sec-ch-ua-platform": '"Windows"',
        "sec-fetch-dest": "document",
        "sec-fetch-mode": "navigate",
        "sec-fetch-site": "none",
        "sec-fetch-user": "?1",
        "upgrade-insecure-requests": "1",
      },
      referrerPolicy: "strict-origin-when-cross-origin",
      body: null,
      method: "GET",
      mode: "cors",
      credentials: "include",
    }
  );
  let js = await f.json();
  return js;
}