Kleros Documentation

Decentralized dispute resolution for the world

Welcome to Kleros

Kleros is a decentralized dispute resolution protocol that uses blockchain and crowdsourced jurors to adjudicate disputes fairly, transparently, and affordably.

I want to be a juror

Stake PNK, vote on disputes, earn rewards

I want to use a product

Curate, Proof of Humanity, Escrow, and more

I want to build with Kleros

Integrate dispute resolution into your application

I want to understand Kleros

Learn the mechanics, game theory, and economics

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Kleros Court

The heart of Kleros. Court uses crypto-economic incentives and game theory to crowdsource fair decisions on any adjudicable dispute.

How it works

Understand the dispute resolution process

Become a juror

Step-by-step guide to staking and voting

Integrate Court

Add dispute resolution to your application

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Products

Kleros products are decentralized applications that use Kleros Court for dispute resolution.

Curate

Decentralized lists & registries

Create and maintain community-curated registries of anything—tokens, contracts, addresses, or custom data.

Proof of Humanity

Sybil-resistant identity

A registry of verified humans, combining social vouching with dispute resolution to prevent duplicates and bots.

Escrow

Secure transactions

Hold funds in escrow with built-in dispute resolution if something goes wrong.

Scout

Contract & token verification

Community-curated safety information for smart contracts, tokens, and dApps.

Governor

DAO governance

Decentralized governance execution with dispute resolution for contested proposals.

Oracle

Reality.eth + Kleros

Crowdsourced oracle with Kleros arbitration as the final backstop for disputed answers.

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For Developers

Build trustless applications with decentralized dispute resolution.

New to Kleros?

Start here if you’re exploring how to integrate Kleros into your project.

1. Understand the architecture

   Learn how the arbitrator (Court) and arbitrable applications work together.

   Read the overview →

2. Try the quick start

   Get a basic integration running in 5 minutes.

   Quick start guide →

3. Explore examples

   See real-world integration patterns.

   View examples →

Build an arbitrable app

You want your smart contract to use Kleros Court for dispute resolution.

ERC-792: Arbitration Standard

The interface your contract needs to implement

ERC-1497: Evidence Standard

How to handle evidence submission

Full integration guide

Complete walkthrough with code examples

Testing tools

Test your integration before going live

Build on a Kleros product

You want to integrate with an existing Kleros product like Curate or PoH.

Curate integration

Query registry data, build on TCRs

PoH integration

Verify human users in your app

Escrow integration

Add escrow functionality

Oracle integration

Use Reality.eth + Kleros

Reference: Contract addresses, ABIs, and APIs

All the technical details you need for integration

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Learn the Concepts

How dispute resolution works

The complete lifecycle of a Kleros dispute

Game theory & incentives

Why jurors are incentivized to vote honestly

Court hierarchy

Specialized courts and appeals

Token economics

How PNK staking and rewards work

Credible neutrality

Why Kleros decisions can be trusted

Sortition

How jurors are randomly selected

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Research & Academia

Kleros is built on peer-reviewed research and collaborates with leading institutions.

Published papers

Academic publications about Kleros

Case studies

Real disputes and their outcomes

Research partnership? Kleros collaborates with universities and research institutions including Stanford. Get in touch →

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Need Help?

Help Center

Step-by-step guides and troubleshooting

Discord

Chat with the community

Telegram

Join the conversation