Built for Convergence — Chainlink Hackathon

AI agents can spend money.
They can't verify value.

ValueOracle is a verifiable commerce oracle powered by Chainlink CRE. Not just price checks — it evaluates whether a purchase is actually worth it.

Try Live Demo View Source — Coming Soon
Chainlink Price Feed
ETH/USD → $3,245
Token price
Simple Price Oracle
Laptop → $1,100
Just a price check
ValueOracle
Laptop → 92/100 ✅
Price + quality + trust = value

How it Works

01
Agent Intent
AI agent submits purchase intent to PurchaseGuard smart contract
02
CRE Trigger
Chainlink CRE workflow triggers on PurchaseRequested event
03
Value Analysis
Engine aggregates prices, quality ratings, reviews & return rates
04
Oracle Decision
Signed value verdict (approve/reject) returned onchain

Value Score Formula

Not just "is it cheap?" — but "is it worth it?"

💰
Price Fairness
35%
Proposed vs market median across sources
⭐
Quality Signal
25%
Product rating, review count, return rate
🤝
Seller Trust
25%
Seller reputation score & history
⚖️
Value Ratio
15%
Quality-to-price ratio vs alternatives
valueScore = priceFairness×0.35 + qualitySignal×0.25 + sellerTrust×0.25 + valueRatio×0.15
score ≥ 70 → ✅ APPROVE  |  40–69 → ⚠️ CAUTION  |  score < 40 → ❌ REJECT

Live Oracle Demo

See how ValueOracle evaluates real purchase decisions

Architecture

AI Agent → PurchaseGuard.sol → Chainlink CRE Workflow ↑ ↓ │ Offchain Value Engine │ • Multi-source prices │ • Quality ratings & reviews │ • Seller reputation │ • Value score calculation └────── Oracle Response (value score + verdict)

Tech Stack

Smart Contract
Solidity
Oracle Layer
Chainlink CRE
Value Engine
Node.js
Network
Sepolia
Data Sources
Multi-source