MCP.Market

Boo X402 MCP server

by lucle87·io.github.lucle87/boo-x402-mcp·v1.0.1
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Pay-per-call crypto data for AI agents. USDC on Base via x402. No API key.

B78/100grade B
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Safety scan
B78/100

full report

Adoption
New

0 stars

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If you have run it, two minutes of your experience saves the next person an afternoon.

Boo X402 tools (2)

write = sends, deletes, buys or posts

Read from the package source without running it. The installed server may list more.

  • x402_list_paid_tools

    FREE. Lists every paid tool in this server with its price in USDC. Call this FIRST to see what data is available and what it costs before spending anything.

  • x402_spend_status

    FREE. Shows how much USDC has been spent this session and the configured spend caps (per call and total).

Public scan report

scanner v0.1.9 · 2026-09-26 · same rubric, same numbers if you re-run it

no findings
  • Code scan4 source files scanned25/25
  • –Live reliabilityno gateway calls yet and no remote to proben/a
  • –Tool poisoningtools not inspected (local package is not executed); not countedn/a
  • Auth qualitystatic API keys via environment variables6/15
  • Maintenancelast push 76 days ago12/15
  • Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10
Overall 78/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Boo X402 compares

Against every graded Finance MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
78/100
higher than 62% of 1,761 Finance servers
Tools
2
the typical Finance server has 8
Tools that change things
0%
typical: 0%. Fewer write tools means less an agent can break

What its tools let an agent do: 2 read

Install Boo X402 in Claude Code, Cursor or VS Code

Runs npx -y boo-x402-mcp on your machine. Read the scan report first; the gateway never runs local packages.

claude mcp add boo-x402-mcp -- npx -y boo-x402-mcp
Add to Cursor

What the publisher says

From the Boo X402 repository's README, as published. We do not edit it. Read it on GitHub

boo-x402-mcp

One MCP server giving AI agents pay-per-call access to crypto/web3 ground-truth data across 5 chains: Ethereum, BNB Chain, Base, Solana, and Robinhood Chain (chain_id 4663).

Paid in USDC on Base via x402. No API key. No signup. No subscription. Built-in spend caps.

Why

Agents cannot sign up for API keys. x402 lets your agent pay per call with a signature. This server wraps a fleet of data APIs behind one install, routes each question to the right backend, and enforces a spending limit before the wallet ever signs.

Tools (34 paid + 2 free)

Call x402listpaid_tools (FREE) first to see everything with live prices.

Safety (use before you buy)

Meme tokens

Token data

Market & DeFi

Prediction markets

Robinhood Chain (new L2, not covered by other providers)

Free: x402listpaidtools, x402spend_status

Install

{
  "mcpServers": {
    "boo-x402": {
      "command": "npx",
      "args": ["-y", "boo-x402-mcp"],
      "env": {
        "WALLET_PRIVATE_KEY": "0x...",
        "MAX_USD_PER_CALL": "0.05",
        "MAX_USD_TOTAL": "5"
      }
    }
  }
}

Works with Claude Desktop, Claude Code (claude mcp add), Cursor, and any MCP client.

Wallet

You need a wallet holding USDC on Base. No ETH needed for gas: x402 uses EIP-3009, so your wallet only signs, and the facilitator pays gas.

Your private key stays on your machine, in your MCP config. It is never transmitted. Payments are signed locally, per call.

The free tools work with no wallet at all.

Spend caps

x402 wallets are unlimited by default. This server is not:

  • MAXUSDPER_CALL (default 0.05) - rejects any single payment above this, before signing
  • MAXUSDTOTAL (default 5) - rejects further calls once session spend reaches this

Restart the server to reset the session total.

Data

Public, verifiable sources (Blockscout, RPC, DEX pairs, DefiLlama, GoPlus). Read-only.

NOT investment advice.

License

MIT

Nothing above is checked by us. What we check is on the safety report.

Boo X402: common questions

Is Boo X402 MCP server safe?
Mostly: it is graded B (78/100). Read the Boo X402 safety report
How do I install Boo X402?
It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does Boo X402 need an API key?
Yes. The registry entry asks for WALLET_PRIVATE_KEY.
Is Boo X402 maintained?
The last commit was 115 days ago (2026-07-12). The latest release is v1.0.1.
What can I use instead of Boo X402?
Servers from other publishers that do the same job: Blockrun MCP server, Agent402.Tools: pay-per-call web tools MCP server and three.ws Agent Payments MCP server.
How does Boo X402 compare with other Finance MCP servers?
safety score 78/100 (higher than 62% of 1,761 Finance servers); tools 2 (the typical Finance server has 8); tools that change things 0% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.

Alternatives to Boo X402

Same job from other publishers: the closest match first, then the best rated.

  • Blockrun
    Web search, deep research, prediction markets & crypto data for AI agents. Pay per call via x402.
    B
  • Agent402.Tools: pay-per-call web tools
    Agentic Finance: 500+ agent tools, multi-chain USDC over x402 or MPP, or free via proof-of-work
    A
  • three.ws Agent Payments
    Governed x402 payment sessions: pay any endpoint with budget, allowlist & per-tx caps, no key.
    More from nirholas →
    B
  • Sato Hub: Build Onchain & Crypto Agents
    Build any crypto agent: x402, ERC-8004, wallets. Does a server take your key? Hosted? Maintained?
    B
  • FiatDock
    MCP marketplace: AI agents buy services from other agents per call in USDC, plus a bank cash-out
    B