Ethereum Comments Protocol
An open protocol and toolkit for onchain comments.
npm install @ecp.eth/sdkImplementation Options
iframe (no code)
Single-line, copy and paste implementation for static sites, blogs, and basic integrations.
TypeScript SDK
Customize your own commenting UI, using an open source Ponder indexer and example code for React and React Native.
Smart Contracts
Direct contract integration for custom implementations and advanced use cases.
Technical Overview
Chain Agnostic
Identical contract interfaces across all EVM chains. Deploy on your existing chain or index across multiple.
Modular Architecture
Integrate specific components without dependencies on a full vertical stack. No vendor lock-in.
Infrastructure Layer
Functions as backend infrastructure without user-facing branding requirements or network effects.
Contract Stability
Non-upgradeable contracts and standardized interfaces ensure long-term API stability and predictable behavior.
EVM Standards
Built on established Ethereum standards and tooling. Compatible with existing infrastructure and wallets.
Gas Optimization
Optimized for L2s: ~$0.001 per comment on Base. Optional delegated signing and calldata suffix for UX.
Integration Example
import { CommentsEmbed } from '@ecp.eth/sdk/embed'
const baseOrigin = 'https://blog.example.com'
export function Comments() {
return (
<div>
<h3>Comments</h3>
<CommentsEmbed
uri={new URL(
window.location.pathname,
baseOrigin
)}
/>
</div>
);
}