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First autonomous x402 payment skill for Hermes Agent — enables Hermes to detect HTTP 402 Payment Required responses and autonomously pay with USDC on Arc Testnet (Chain ID: 5042002), with on-chain settlement in under 1 second.

Documentation for building on Base

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Escrow smart contract deployed on Arc Testnet using Foundry. Secure three-party payment system with dispute resolution.

This sample app demonstrates gasless USDC nanopayments using Circle Nanopayments on Arc.

FT marketplace with list buy offer and delist ERC721 tokens on Arc Testnet

Real-time Arc Testnet dashboard visualizing X402 payments, ERC-8004 identity and ERC-8183 jobs

Staking smart contract deployed on Arc Testnet using Foundry. Stake native tokens and earn time-based rewards.

Recurring payment subscription system with plans, subscribe, renew and cancel on Arc Testnet

On chain price oracle with authorized feeders and staleness check on Arc Testnet

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Benchmarking tool for OP stack chains

ArcDEX — First DEX UI on Arc Testnet. Swap USDC/EURC with sub-second finality.

This sample app emonstrates how developers can build the best USDC interoperability UX for wallets using Arc and Gateway.

MCP server for Arc Testnet - gives Claude Code direct access to blockchain data, ERC-8004 agents and ERC-8183 jobs

Multi-Agent Orchestrator smart contract on Arc Testnet. Agents autonomously hire sub-agents, complete missions and split payments.

This sample app demonstrates an end-to-end escrow workflow — from contract creation and deposit, through AI-validated deliverable submission, to fund release or refund on Arc.

Every AI Agent deserves a wallet.

Circle's open source skills for AI-assisted development.

Counter smart contract deployed on Arc Testnet using Foundry. Increment, decrement and reset counter on-chain.

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FluxAgent — Autonomous Agent Economy, built on Arc

Autonomous Intent Solver on Arc Testnet — agents analyze and execute user intents on-chain

Building the Agentic Economy on Arc Testnet — 27+ contracts, 20+ PRs, npm SDK, MPP, ArcDEX, ERC-8004

Autonomous x402 micropayment plugin for Hermes Agent — pays with USDC on Arc Testnet when Hermes encounters HTTP 402 Payment Required

Everything required to run your own Base node

Machine Payments Protocol (MPP) x Arc Testnet x ArcDEX — HTTP 402 payment-gated APIs

TypeScript SDK for Arc Testnet Agent Economy contracts

Uniswap v2 style AMM for USDC EURC pool on Arc Testnet

Arc Testnet Agent Economy HyperIndex Subgraph indexing EventLogger AgentIdentity SpendingLimits and SplitPayment contracts

X402 payment-gated API on Arc Testnet with AI agent. Built with Circle USDC, x402 protocol and viem.

Route payments across multiple recipients with configurable shares on Arc Testnet

Programmable spending limits for AI agents on Arc Testnet

ERC-8004 inspired Agent Identity Registry with reputation and mission tracking on Arc Testnet

PIN protected user controlled wallet setup for Arc agents

Flash loan provider with liquidity pool and fee system on Arc Testnet

Cross chain lock and mint token bridge with relayer and refund on Arc Testnet

A Farcaster Mini App on Base for Book vs Film voting with CSM token rewards

Autonomous x402 payment agent for Arc Testnet — Hermes Agent skill that handles HTTP 402 Payment Required responses with USDC micropayments via EIP-3009

ERC-4626 tokenized vault for native USDC on Arc Testnet, with agent-yield deposit support for Multi-Agent Orchestrator integration

This sample app demonstrates a multi-chain treasury management system with cross-chain interoperability.

DAO smart contract deployed on Arc Testnet using Foundry. Decentralized governance with membership, proposals, voting and execution.

Vesting smart contract deployed on Arc Testnet using Foundry. Token vesting with cliff period, linear release and revocation support.

Lottery smart contract deployed on Arc Testnet using Foundry. Transparent on-chain lottery with ticket system and random winner selection.

MultiSig Wallet smart contract deployed on Arc Testnet using Foundry. Multi-owner transaction approval with configurable threshold.

TimeLock smart contract deployed on Arc Testnet using Foundry. Lock funds with time-based release, cancellation and beneficiary management.

Voting smart contract deployed on Arc Testnet using Foundry. Create proposals, vote and finalize results on-chain.

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Farcaster Mini App on Base for daily CSM token claims

ERC20 token smart contract deployed on Arc Testnet using Foundry and OpenZeppelin. Supports minting, burning, pausing and access control.

ERC721 NFT smart contract deployed on Arc Testnet using Foundry and OpenZeppelin. Supports minting, URI storage and access control.

Whitelist smart contract deployed on Arc Testnet using Foundry. Manages whitelisted addresses with access control.

EventLogger smart contract deployed on Arc Testnet using Foundry. Logs messages and timestamps on-chain.

SimpleStorage smart contract deployed on Arc Testnet using Foundry. Stores and retrieves numbers and text on-chain.

AI-powered quiz generator for primary school teachers

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A Farcaster Mini App built on Base. Simple number guessing game with on-chain social features.

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