Google Sheets

const KERUX_TRIGGER_URL = "https://www.usekerux.com/t/YOUR_TRIGGER_TOKEN";

function sendNewRows() {
  const sheet = SpreadsheetApp.getActiveSheet();
  const rows = sheet.getDataRange().getValues();
  const head = rows.shift();
  const col = (name) => head.indexOf(name);
  rows.forEach((r, i) => {
    if (r[col("sent")] || !r[col("linkedin_url")]) return;
    const res = UrlFetchApp.fetch(KERUX_TRIGGER_URL, {
      method: "post",
      contentType: "application/json",
      payload: JSON.stringify({
        linkedin_url: r[col("linkedin_url")],
        first_name: r[col("first_name")],
        email: r[col("email")],
        company: r[col("company")],
      }),
      muteHttpExceptions: true,
    });
    if (res.getResponseCode() === 202) sheet.getRange(i + 2, col("sent") + 1).setValue(new Date());
  });
}