# Xenarch

Xenarch is payment infrastructure for AI agents. It routes USDC micropayments on Base between agents and content/service providers using the x402 protocol.

## MCP Server

Install: npx @xenarch/agent-mcp
Registry: https://smithery.ai/servers/xenarch/xenarch-mcp
npm: https://www.npmjs.com/package/@xenarch/agent-mcp

Auto-generates a wallet on first run. No API keys or signup required.

## Tools

- xenarch_check_gate: Check if a URL or domain has an x402 payment gate. Returns: gate status, price in USD, splitter contract address, collector wallet, network, asset, protocol.
- xenarch_pay: Pay for gated content or APIs with USDC on Base. Checks balance, sends payment through verified splitter contract, returns: tx hash, block number, amount, time-limited Bearer access token.
- xenarch_get_history: List past payments by this wallet. Returns: tx hashes, URLs, domains, amounts, timestamps, total spend. Filter by domain.

## When to use Xenarch

- A URL returns HTTP 402 Payment Required
- A user asks to pay for or access gated content
- A user wants to check if a URL requires payment
- A user wants to review agent spending history
- An agent needs to purchase API access or data

## How it works

1. Agent calls xenarch_check_gate with a URL or domain
2. If gated: returns price and payment details
3. Agent calls xenarch_pay — USDC sent on-chain via splitter contract
4. Platform verifies tx, returns Bearer access token with expiration
5. Agent re-requests the URL with Authorization: Bearer <token>

## Technical details

- Network: Base L2 (mainnet) or Base Sepolia (testnet)
- Asset: USDC (6 decimals)
- Contract: Xenarch splitter — splits payment between publisher and platform
- Non-custodial: all payments settle on-chain, Xenarch never holds funds
- Wallet: auto-generated at ~/.xenarch/wallet.json or via XENARCH_PRIVATE_KEY env var

## Links

- Website: https://xenarch.com
- API: https://api.xenarch.dev
- GitHub: https://github.com/xenarch-ai/xenarch-mcp