the c4 monorepo

Self-hosted x402 facilitator.

x402 payments in Rust: verify, settle, and monitor payments over HTTP 402 flows

Unopinionated low level utilities for Ethereum

Fast, effective, mind-blowing, coding CLI. Browser integration, multi-agents, theming, and reasoning control. Orchestrate agents from OpenAI, Claude, Gemini or any provider.

Zig package to interact with Ethereum

A opensource blazing fast EVM relayer - built in rust.

EDB: The Ethereum Project Debugger

Transparent cross-chain transaction routing for EIP-7702 accounts

✨🤝✨ Build instant multiplayer webapps, no server required — Magic WebRTC matchmaking over BitTorrent, Nostr, MQTT, IPFS, Supabase, and Firebase

💠 Solidity language support for Zed.

A simple RISC-V runtime.

Validate and Run GitHub Actions locally.

keyboard-based digital signatures

onchain maxi wallet software

⚡ Stream browser logs to terminal, zero setup, perfect for Ai Agents

smolmex

Deploy any app to TEE.

The best smart contracts in one place.

Simplifying reinforcement learning for complex game environments

An ultra-high performance and flexible EVM. Written in zig

modern fork of eth95

Solidity VSCode extension with integrated debugging and execution tracing for smart contract development

The most accurate document search and store for building AI apps

Backlog.md - A tool for managing project collaboration between humans and AI Agents in a git ecosystem

one page guides that i let my subscribed/customised agents consume to perform actions

A community-driven knowledge base of practical patterns for Effect-TS.

Code-first Typescript GraphQL Server without codegen or metaprogramming

The AI coding agent built for the terminal.

Simple logging library with zero dependencies for Deno, Node.js, Bun, browsers, and edge functions