zunivo-mcp

Give your AI agent working money on Arc.

An MCP server that lets any MCP client (Claude Desktop, Claude Code, etc.) discover .agent services, pay for APIs over x402 in USDC, and issue payment links — non-custodial, with a hard daily budget.

Tools

Safety model

• The private key lives in env — it is never shown to the model.
• Every call is capped (ZUNIVO_MAX_PER_CALL, default 1 USDC) under a hard daily budget (ZUNIVO_DAILY_CAP, default 5 USDC). Set ZUNIVO_SPEND_FILE (e.g. ~/.zunivo-spend.json) so the budget survives restarts — strongly recommended before pointing this at real funds.
• Content returned by paid endpoints is untrusted input to your model. A malicious API could try to talk your agent into more paid calls — the daily cap is the backstop; keep it small.
• When paying a .agent name, the recipient is pinned to the address the name resolves to on-chain — a malicious server cannot redirect funds.

Setup (Claude Desktop)

{
  "mcpServers": {
    "zunivo": {
      "command": "npx",
      "args": ["-y", "zunivo-mcp"],
      "env": {
        "AGENT_PK": "0x<agent wallet private key>",
        "ZUNIVO_RECORDS_ADDRESS": "0x<ZunivoAgentRecords on Arc>",
        "ZUNIVO_DAILY_CAP": "5",
        "ZUNIVO_MAX_PER_CALL": "1"
      }
    }
  }
}

Fund the wallet with test USDC at https://faucet.circle.com (Arc Testnet).

Example session

You: find me a crypto index feed and get the latest value

Agent: lists agents → finds data.agent → paid_fetch /v1/index/crypto → pays 0.05 USDC → returns the data + ArcScan receipt

Part of the Zunivo network — the payment layer for AI agents on Arc.