Vadym Nahornyi This workflow corresponds to n8n.io template #8016 — we link there as the canonical source.
This workflow follows the Google Sheets → HTTP Request recipe pattern — see all workflows that pair these two integrations.
The workflow JSON
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"createdAt": "2025-08-05T15:02:04.949Z",
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],
[
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},
"\ud83d\udcf1 Telegram Trigger": {
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]
]
},
"\ud83d\udd0d Check New Member": {
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[
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},
"\ud83c\udf89 Welcome New Member": {
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"\ud83d\udccb Find Pending CAPTCHA": {
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},
"\ud83c\udfb2 Generate CAPTCHA Question": {
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},
"\ud83d\udeab Ban User (Failed CAPTCHA)": {
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{
"node": "\ud83d\uddd1\ufe0f Delete User Message",
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}
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},
"\ud83d\uddd1\ufe0f Delete CAPTCHA Question (Success)": {
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}
}
}
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About this workflow
🚀 Lightning-fast setup - Deploy in under 5 minutes 💡 Zero AI costs - Uses simple math instead of expensive LLM calls 🛡️ 99% spam blocking - Mathematical CAPTCHAs stop bots instantly ⚡ Ultra-efficient - Runs on minimal resources, scales to thousands of users 🎯 Plug-and-play -…
Source: https://n8n.io/workflows/8016/ — original creator credit. Request a take-down →
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