TriSellAll

Overview

TriSellAll is an open-source alert bot built for resellers that detects new listings across Vinted, Gumroad, and Facebook Marketplace in under 5 seconds. It was the first tool to achieve sub-5-second detection for Gumroad - something never done before - and delivers alerts via Discord (DM or server) and email through a simple, organised interface.

The Challenge

Achieving sub-5-second detection across multiple marketplaces, especially Gumroad which had no existing alert tooling. Each platform has different rate limits, page structures, and detection surfaces, making consistent low-latency monitoring technically difficult.

The Solution

Built a constant-running Node.js backend worker that polls and detects listing changes in near real-time, paired with a clean Next.js frontend and Supabase for storage. The system delivers alerts through Discord (both DMs and server webhooks) plus email, with a simple UI focused on clarity and speed of setup.

Technologies Used

Key Features

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  Sub-5-second new listing detection across Vinted, Gumroad, and FBM

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  Discord alerts - both direct messages and server channel webhooks

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  Email alert notifications for real-time updates

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  Sign in with Discord for seamless onboarding

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  Simple, organised UI designed for speed of use

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  First-ever sub-5s Gumroad detection - an industry first

Results & Impact

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  Industry-first sub-5-second Gumroad detection capability

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  Consistent sub-5-second alert latency across all three platforms

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  Clean, easy-to-use interface praised by early users

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  Fully open-source on GitHub for community contributions