notebooklm.js

async function listNotebooks() {
    const authParams = await getAuthParams();
    const { url: n, headers: r, body: o } = await createBatchExecuteRequest(authParams);

    const response = await fetch(n.toString(), {
        method: "POST",
        headers: r,
        body: o
    });
    const text = await response.text();

    const parsedResponse = parseBatchExecuteResponse(text);
    return parsedResponse.map(item => ({
        id: item.data[2],
        title: item.data[0],
        emoji: item.data[3]
    }));
}

async function getAuthParams() {
    const response = await fetch("https://notebooklm.google.com/", {
        method: "GET",
        redirect: "error"
    });
    const text = await response.text();
    
    const at = extractValue("SNlM0e", text);
    const bl = extractValue("cfb2h", text);
    
    if (!at || !bl) {
        throw new Error("Please sign-in to your Google account to use NotebookLM");
    }
    
    return {
        at,
        bl
    };
}

function extractValue(key, text) {
    const match = text.match(new RegExp(`"${key}":"([^"]+)"`));
    return match ? match[1] : null;
}

async function createBatchExecuteRequest(authParams) {
    const url = new URL(`https://notebooklm.google.com/_/LabsTailwindUi/data/batchexecute`);
    url.searchParams.append("rpcids", "wXbhsf"); // Only 'wXbhsf' RPC ID is used here.
    url.searchParams.append("_reqid", gC().toString()); // gC() is a helper function to generate a random number.
    url.searchParams.append("source-path", "/");
    url.searchParams.append("rt", "c");

    const headers = new Headers({ "Content-Type": "application/x-www-form-urlencoded;charset=utf-8" });
    const body = new URLSearchParams({ "f.req": JSON.stringify([["wXbhsf", [null, 1], null, "generic"]]) }); // Hardcoded for listNotebooks RPC.

    url.searchParams.append("bl", authParams.bl); //Append auth parameters
    body.append("at", authParams.at); //Append auth parameters

    return { url, headers, body };
}

function parseBatchExecuteResponse(response) {
    const extractedData = extractDataFromResponse(response); //Helper function. Not included in this flat function.
    return extractedData;
}

function extractDataFromResponse(response) {
    const t = response.split('\n').slice(2).join('');
    const n = JSON.parse(t);
    const r = [];
    for (const o of n) {
        if (o[0] !== 'wrb.fr') continue;
        let i;
        o[6] === 'generic' ? i = 1 : i = parseInt(o[6], 10);
        const s = o[1], l = JSON.parse(o[2]);
        r.push({ index: i, rpcId: s, data: l });
    }
    return r.map(item => item.data);
}

function gC() {
    return Math.floor(Math.random() * 9e5) + 1e5;
}