# Eval Engine

### Overview

<figure><img src="https://1992777252-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FwoLAzTGcwgu5hRffYGQi%2Fuploads%2FAoBPtnEzGyUibjvpNgJx%2FX_logo.png?alt=media&#x26;token=1540a0c6-47ab-4ce9-ae11-4e7522154eb3" alt="" width="188"><figcaption><p>Eval Engine</p></figcaption></figure>

Eval Engine is a decentralized framework for evaluating AI agents with a focus on crypto-native agents.&#x20;

> Built on Chromia blockchain - a gas-free relational blockchain that enables seamless user experience without transaction fees.&#x20;

The system consists of three key components:

1. **Chromia Blockchain**: Acts as a transparent, immutable, gas-free database
2. **Engine**: The evaluation service
3. **Client**: The end user requesting evaluations

### Think of it as a Distinguished Food Critic

<figure><img src="https://1992777252-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FwoLAzTGcwgu5hRffYGQi%2Fuploads%2FUrawA2iz9nC2iLr2SHFf%2Fimage.png?alt=media&#x26;token=84b9853c-ddef-43a1-9084-6986aabe25de" alt=""><figcaption><p>Eval Engine is like a Distinguished Food Critic</p></figcaption></figure>

Eval Engine is like a World-Renowned Food Critic. While their evaluation criteria remain private, their final ratings and reviews are public and immutable. Eval Engine works similarly - it processes evaluations through multiple specialized models but records all results transparently on Chromia blockchain. Like a prestigious restaurant rating that can't be bought or manipulated, Eval Engine ensures evaluation integrity through blockchain technology.