What is proxy (auto) bidding?

Buyers enter the maximum they're willing to pay. The system automatically bids on their behalf in the minimum increment, up to their maximum. This means bidders don't have to watch the auction live.

What is sniping protection?

When a bid is placed in the final N minutes of an auction (configurable), the auction end time is extended by N minutes. This prevents last-second sniping and ensures all interested buyers have a fair chance to respond.

How are buyers verified?

Buyers must verify their identity and, for high-value auctions, place a refundable deposit before bidding. The deposit is held until the auction closes and returned to non-winners automatically.

E-commerce & Retail

Build a Online Auction Platform with AI - in Hours

ProjectCode generates a complete, production-ready Online Auction Platform from a single natural language prompt. In hours instead of months, you get a React frontend, NestJS REST API, PostgreSQL database, and authentication - fully integrated, live-previewed, and deployed to a URL you own.

Estimated build time: 2–4 hours

Build my Auction Platform now View pricing

Free to start · No credit card required

The Challenge

Why building a Auction Platform from scratch is hard

Building a Online Auction Platform from scratch requires months of development time and significant engineering resources. Teams struggle to coordinate frontend, backend, database, and authentication while managing auction platform-specific business logic, integrations, and role-based access rules.

What's Included

Everything your Auction Platform needs

ProjectCode generates a production-ready Auction Platform with all the modules your team needs from day one.

Live and timed auction creation with reserve prices

Real-time bid tracking with outbid notifications

Auto-bid (proxy bidding) up to maximum amount

Auction countdown timers with sniping protection extension

Seller listing management with photo upload

Buyer verification and deposit management

Winner invoicing and payment processing

Auction analytics: bid activity, conversion rate, average winning price

Architecture

How it's built

The generated Auction Platform follows production-grade architecture patterns.

React 18 + TypeScript frontend with role-based dashboards tailored for auction platform workflows

NestJS REST API with dedicated auction platform modules, DTOs, validators, and service layer

PostgreSQL relational schema with normalized tables for all auction platform entities

JWT + Google OAuth authentication with granular permission gates per role

Real-time Socket.IO events for live auction platform status updates and notifications

Managed hosting with one-click deploy, custom domain, and auto-SSL

Database

PostgreSQL schema designed for Auction Platform

ProjectCode generates a normalized, indexed PostgreSQL schema with the right tables and relationships for your use case. You own the schema and can evolve it freely.

auctions (id, seller_id, title, description, category_id, start_price, reserve_price, start_at, end_at, status, auto_extend_minutes, images jsonb)
bids (id, auction_id, bidder_id, amount, proxy_max, created_at, status, outbid_notified_at)
auction_results (id, auction_id, winner_id, winning_bid, reserve_met, invoice_id)
deposits (id, user_id, auction_id, amount, status, held_at, released_at, forfeited_at)

schema.sql (preview)

-- Generated by ProjectCode
-- Online Auction Platform schema

CREATE TABLE auctions__id (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  created_at TIMESTAMPTZ DEFAULT NOW(),
  updated_at TIMESTAMPTZ DEFAULT NOW()
  -- ... auto-generated columns
);

CREATE TABLE bids__id (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  created_at TIMESTAMPTZ DEFAULT NOW(),
  updated_at TIMESTAMPTZ DEFAULT NOW()
  -- ... auto-generated columns
);

CREATE TABLE auction_results__id (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  created_at TIMESTAMPTZ DEFAULT NOW(),
  updated_at TIMESTAMPTZ DEFAULT NOW()
  -- ... auto-generated columns
);

CREATE TABLE deposits__id (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  created_at TIMESTAMPTZ DEFAULT NOW(),
  updated_at TIMESTAMPTZ DEFAULT NOW()
  -- ... auto-generated columns
);

Tech Stack

Production-ready from day one

Every generated app uses a battle-tested stack you can deploy anywhere and own completely.

Frontend

React 18 + TypeScript + Tailwind CSS

Backend

NestJS 10 + Node.js + TypeScript

Database

PostgreSQL (managed or Supabase)

Auth

Email OTP · Google OAuth · GitHub OAuth

Deployment

Managed hosting · Custom domain · Auto-SSL

AI Models

Claude Sonnet · Claude Opus · Kimi

Try It Now

Example prompt to get started

Copy this prompt into ProjectCode and get a working app in minutes.

ProjectCode prompt

Build an online auction platform for an art and collectibles auctioneer running 20 auctions per week. Include timed auction listings with reserve prices, real-time bidding with Socket.IO, proxy auto-bidding, anti-sniping time extension when bids come in the last 5 minutes, buyer deposits for high-value auctions, automated winner invoicing with Stripe payment, and an analytics dashboard showing bid activity and sell-through rate per auction category.

Build this now - it's free

Deployment

Deploy your Auction Platform anywhere

Managed hosting

One-click deploy to a live URL managed by ProjectCode.

Custom domain

Connect your own domain with auto-provisioned SSL via Cloudflare.

GitHub export

Push to your GitHub repo and self-host or deploy via Vercel, Railway, or AWS.

Docker ready

Export a Dockerfile and docker-compose for any containerized environment.

Pricing

Start free, scale as you grow

No per-seat fees. No vendor lock-in. Token-based pricing that scales with your usage.

Free

Start building your first app. Live preview, managed hosting, and full code export included.

Token Packs

From $5

Purchase token packs that roll over every month. Build more, pay only for what you use.

Enterprise

Custom

Custom models, SLA, SSO, and private cloud deployment for large teams.

See full pricing details

FAQ

Common questions about building a Auction Platform

Bids are submitted via the UI and broadcast in real time to all active viewers using Socket.IO. The current highest bid updates instantly across all connected browsers without refresh.

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Build your Auction Platform in hours, not months

Start free. No credit card. Your first app is live in minutes.

Get started free