free gemini 2.5 flash no apikey

// by wolep

const gemini = {
    getNewCookie: async function () {
        const r = await fetch("https://gemini.google.com/_/BardChatUi/data/batchexecute?rpcids=maGuAc&source-path=%2F&bl=boq_assistant-bard-web-server_20250814.06_p1&f.sid=-7816331052118000090&hl=en-US&_reqid=173780&rt=c", {
            "headers": {
                "content-type": "application/x-www-form-urlencoded;charset=UTF-8",
            },
            "body": "f.req=%5B%5B%5B%22maGuAc%22%2C%22%5B0%5D%22%2Cnull%2C%22generic%22%5D%5D%5D&",
            "method": "POST"
        });
        console.log('get new cookie')
        return r.headers.getSetCookie()[0].split("; ")[0]
    },

    ask: async function (prompt, previousId = null) {
        if (typeof (prompt) !== "string" || !prompt?.trim()?.length) throw Error(`mana prompt nya?`)
        let resumeArray = null
        let cookie = null
        if (previousId) {
            const s = atob(previousId)
            const j = JSON.parse(s)
            resumeArray = j.newResumeArray
            cookie = j.cookie

        }
        const headers = {
            "content-type": "application/x-www-form-urlencoded;charset=UTF-8",
            "x-goog-ext-525001261-jspb": "[1,null,null,null,\"9ec249fc9ad08861\",null,null,null,[4]]",
            cookie: cookie || await this.getNewCookie()
        }
        const b = [[prompt], ["en-US"], resumeArray]
        const a = [null, JSON.stringify(b)]
        const obj = { "f.req": JSON.stringify(a) }
        const body = new URLSearchParams(obj)
        const response = await fetch(`https://gemini.google.com/_/BardChatUi/data/assistant.lamda.BardFrontendService/StreamGenerate?bl=boq_assistant-bard-web-server_20250729.06_p0&f.sid=4206607810970164620&hl=en-US&_reqid=2813378&rt=c`, {
            headers,
            body,
            'method': 'post'
        })
        if (!response.ok) throw Error(`${response.status} ${response.statusText} ${await response.text() || `(body response kosong)`}`)
        const data = await response.text()
        const match = data.matchAll(/^\d+\n(.+?)\n/gm)
        const array = Array.from(match).reverse()
        const selectedArray = array[3][1]
        const realArray = JSON.parse(selectedArray)
        const parse1 = JSON.parse(realArray[0][2])
        const newResumeArray = [...parse1[1], parse1[4][0][0]]
        const text = parse1[4][0][1][0].replace(/\*\*(.+?)\*\*/g, `*$1*`)
        const id = btoa(JSON.stringify({ newResumeArray, cookie: headers.cookie }))
        const result = { text, id }
        return result
    }


}


// cara pakai


gemini.ask('kenalin aku wolep')
    .then(console.log)
    .catch(err => { console.log(err.message) })

/* output
{
  text: 'Halo Wolep! Senang berkenalan denganmu. Ada yang bisa saya bantu?',
  id: 'eyJuZXdSZXN1bWV....V4Rk5ydS1adjhRIn0='
}

untuk resume cukup lampirkan id dari chat sebelumnya

gemini.ask('siapa namaku?', 'eyJuZXdSZXN1bWV....V4Rk5ydS1adjhRIn0=')
    .then(console.log)
    .catch(err => { console.log(err.message) })

output
{
  text: 'Kamu mengenalkan dirimu sebagai *Wolep*.',
  id: 'eyJuZXdSZXN1bWV.....ItUTV4Rk5ydS1adjhRIn0=' <-- kalau mau resume lampirin lagi id baru ini
}

dan lanjutkan

*/