node-fetch request having custom certificate

UPDATE 2/24/2025
As of Nodejs v23.8 you can use system certificates, see
https://nodejs.org/en/blog/release/v23.8.0#support-for-using-system-ca-certificates-store-on-macos-and-windows

UPDATE 3/27/2025
Insecure solution: to ignore certificate call

process.env["NODE_TLS_REJECT_UNAUTHORIZED"] = 0;

---

While developing you have to deal with internal servers that use enterprise SSL certificate. Nodejs has its own certificate storage. Thereby you need to provide certificates explicitly.

const fetch = require("node-fetch").default;
const https = require("https");
const fs = require("fs");

const ca = fs.readFileSync("./mozilla-ca-plus-custom.pem").toString();
const agent = new https.Agent({ ca });

async function main() {
    const res = await fetch("https://server.local/master/api2/v1/UserPages", {
        "headers": {
            "accept": "application/json, text/plain, */*",
            "accept-language": "en-US,en;q=0.9,ru;q=0.8",
            "authorization": "Bearer 1eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ3cGZlX3VzZXJfaWQiOiIzZTQwNjZkMi04Mjg2LTQyNzktOWFjNC04YzNlNTNhMjNjMjYiLCJ3cGZlX2xvZ2luIjoic2JlcmtvdiIsImh0dHA6Ly9zY2hlbWFzLm1pY3Jvc29mdC5jb20vd3MvMjAwOC8wNi9pZGVudGl0eS9jbGFpbXMvcm9sZSI6WyJNYXN0ZXJBZG1pbiIsIkNvbnRlbnRFZGl0b3IiLCJUcmFuc2xhdG9yIiwiTW9uaXRvciJdLCJzdWIiOiI0YTBiZGQyMC01YzJkLTI1NGUtYTE2ZC03YjY1MDVlZjI1NTgiLCJuYmYiOjE3MDE0MDk3NjgsImV4cCI6MTczMjk0NTc2OCwiaXNzIjoiV3BmZVNlcnZlciIsImF1ZCI6IldwZmVTZXJ2ZXIgQ2xpZW50cyJ9.k_aaDTeJUyxYv--KBVJYZCBSAHiG_eGHACz2dqCvr5w",
            "content-type": "application/json",
            "sec-ch-ua": "\"Microsoft Edge\";v=\"119\", \"Chromium\";v=\"119\", \"Not?A_Brand\";v=\"24\"",
            "sec-ch-ua-mobile": "?0",
            "sec-ch-ua-platform": "\"Windows\"",
            "sec-fetch-dest": "empty",
            "sec-fetch-mode": "cors",
            "sec-fetch-site": "same-origin",
        },
        "body": "{}"
        "method": "PUT",
        agent
    });

    const text = await res.text();
    console.log(text);
}

main();