AgentNexus

[!IMPORTANT] 🟢 Live on Base Mainnet (December 2025)

• Escrow: 0x37A7B1f10b87f31ad916Fb3518118f8AA0d8d2fC
• Entitlements: 0x3c8f32F9cF41Dc255129d6Add447218053743b33

See DEPLOYMENTS.md for full details.

What This Is

AgentNexus is a decentralized infrastructure platform for discovering, purchasing, and executing autonomous AI agents on Base L2. Built on Base, it leverages Account Abstraction (ERC-4337) to provide a seamless, secure, and non-custodial experience for users and agents alike.

The platform consists of three layers: a Next.js frontend for user interaction and marketplace browsing, a Node.js/Express backend that orchestrates agent execution in isolated Docker environments, and Solidity smart contracts (Foundry) that manage ownership, payments, and access control. See ARCHITECTURE.md for a deep dive.

Architecture Overview

🚀 Features

This project is NOT:

• A consumer-facing AI app
• A trading platform or financial product
• A token launch or ICO
• A permissionless agent marketplace (agents require registration)
• A custodial wallet service (users control their own keys)
• A no-code AI builder

AgentNexus is infrastructure software intended for technically competent users who understand blockchain technology and smart contracts.

Current Status

Version: v0.1.0 (Base Mainnet Launch)

Deployment: Live on Base Mainnet (December 2025)

See STATUS.md for detailed project status and DEPLOYMENTS.md for contract addresses. For the grant brief, 3–6 month roadmap, and reviewer-friendly FAQ, see docs/grant-brief.md.

Security & Scope Notes

What Is Safe

• No Private Keys in Agents: Agents run in ephemeral containers without wallet access
• Smart Contract Security: Contracts use ReentrancyGuard and standard OpenZeppelin libraries
• Sandboxed Execution: Docker containers are hardened with seccomp profiles and read-only filesystems
• Audit-Ready Logging: Structured logging available (toggle-controlled)

What Is Experimental

• Compliance Features: Geo/KYC toggles, agent category restrictions, and runtime isolation are implemented but disabled by default
• Agent Zero: Our flagship autonomous agent is functional but under active development

What Is Out of Scope

• Consumer protection mechanisms (this is B2B infrastructure)
• Financial advice or trading guarantees
• Key recovery services

Getting Started

Note: We only provide support for the setup described below. Custom configurations or deployment scenarios are your responsibility.

Prerequisites

• Node.js v20+
• Docker (for agent execution)
• Foundry (for smart contracts)
• pnpm

Installation

1. Clone the repository

   git clone https://github.com/up2itnow0822/AgentNexus2.git
   cd AgentNexus2
   

2. Install dependencies

   pnpm install
   

3. Environment Setup Copy .env.example to .env and fill in your API keys (Alchemy, WalletConnect, etc.).

4. Run Locally

   pnpm dev
   

For smart contract deployment, see the smart-contracts/ directory README.

x402 Payments (USDC on Base)

AgentNexus supports x402, an internet-native payment protocol for pay-per-request API access using USDC on Base.

Paywalled Endpoints

Configuration

# backend/.env
ENABLE_X402=true                              # Enable x402 payments
X402_NETWORK=base-sepolia                     # or "base" for mainnet
X402_PAYMENT_RECIPIENT=0xYourWalletAddress    # Receives payments
X402_MAX_PAYMENT_USDC=100                     # Safety limit per request

Quick Test

# Request without payment → 402
curl -i http://localhost:3001/agents/test-id/premium-analytics
# HTTP/1.1 402 Payment Required
# X-Payment-Required: <base64-encoded payment request>

# After paying USDC and retrying with payment proof → 200
curl -i http://localhost:3001/agents/test-id/premium-analytics \
  -H "X-Payment: <base64-encoded payment payload>"
# HTTP/1.1 200 OK

Verified on Base Sepolia

✅ Transaction: 0x6c4907aa... | Block 35126450 | 0.05 USDC

x402 + CCTP (Cross-Chain Payments)

AgentNexus now supports funding via Circle CCTP from Arbitrum and Optimism.

Usage

• Client requests regular premium resource.
• Paywall includes cctp routes for Arbitrum/Optimism.
• Client burns USDC on source chain and submits proof.
• Permissionless Relayer mints and credits on Base.

Verification (v0.2.0)

✅ Receiver Contract: 0x661a9903... (Base Sepolia) ✅ Mainnet Proof: See docs/proofs/cctp-ethmainnet-to-basemainnet.json for tiny-amount verification (Burn Eth -> Mint Base). ⚠️ Testnet Routes: Circle testnet limited to Ethereum->Base; Arb/OP routes restricted on testnet but active on mainnet.

> > Status: Mainnet proof complete. Tooling and CI refinements in progress.

Contributing

We welcome contributions! Please see CONTRIBUTING.md for guidelines.

License

Apache 2.0 - See LICENSE for details. Third-party protocol and dependency notices are documented in NOTICE.

Protocol Compatibility

AgentNexus is natively compatible with the emerging agent payments and inter-agent communication protocol stack:

Why This Matters

In February 2026, Google announced a partnership with Coinbase and the Ethereum Foundation to extend the Agent Payments Protocol (AP2) with x402 as the HTTP-native payment layer. This makes our existing x402 implementation institutionally validated infrastructure — not experimental.

AgentNexus was built on these primitives from day one. We are one of the earliest production deployments of the full AP2/x402/CCTP/A2A payment stack on Base Mainnet.

agent-wallet-sdk — the TypeScript SDK powering AgentNexus payments — is available on npm as elizaos-plugin-agentwallet for direct integration into any ElizaOS agent.