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Pay-per-call crypto data for AI agents. USDC on Base via x402. No API key.
About
Pay-per-call crypto data for AI agents. USDC on Base via x402. No API key.
Security Report
4.2
Use Caution4.2High RiskThis MCP server provides pay-per-call access to crypto/web3 data via x402 (USDC-based micropayments on Base). The code architecture is sound with proper spend cap enforcement and wallet signing (private key never transmitted). However, the server handles private keys from environment variables and makes multiple external HTTP calls without visible input validation or rate limiting, creating moderate operational risks. Permissions align well with the declared purpose of querying blockchain and market data APIs. Supply chain analysis found 3 known vulnerabilities in dependencies (0 critical, 3 high severity). Package verification found 1 issue.
4 files analyzed · 10 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
What You'll Need
Set these up before or after installing:
Private key of a wallet holding USDC on Base. Stays on your machine.Required
Environment variable: WALLET_PRIVATE_KEY
Max USD per single call (default 0.05).
Environment variable: MAX_USD_PER_CALL
Max USD per session (default 5).
Environment variable: MAX_USD_TOTAL
How to Install
Add this to your MCP configuration file:
{
"mcpServers": {
"io-github-lucle87-boo-x402-mcp": {
"env": {
"MAX_USD_TOTAL": "your-max-usd-total-here",
"MAX_USD_PER_CALL": "your-max-usd-per-call-here",
"WALLET_PRIVATE_KEY": "your-wallet-private-key-here"
},
"args": [
"-y",
"boo-x402-mcp"
],
"command": "npx"
}
}
}Documentation
View on GitHubFrom the project's GitHub README.
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 x402_list_paid_tools (FREE) first to see everything with live prices.
Safety (use before you buy)
| Tool | Price | Chains |
|---|---|---|
token_rugcheck | $0.01 | eth, bnb, base, solana, rhchain |
token_holders | $0.01 | eth, bnb, base, solana, rhchain |
contract_safety | $0.01 | eth, bnb, base |
wallet_risk | $0.01 | eth, bnb, base, solana |
wallet_sanctions | $0.01 | OFAC screen |
wallet_signal | $0.02 | composite verdict |
solana_bundle_check | $0.015 | solana (sniper/bundle detection) |
Meme tokens
| Tool | Price |
|---|---|
meme_discover | $0.01 |
token_momentum | $0.01 |
meme_signal | $0.02 (composite) |
Token data
| Tool | Price |
|---|---|
token_price | $0.01 |
token_supply | $0.01 |
token_snapshot | $0.015 (price + supply + safety) |
Market & DeFi
| Tool | Price |
|---|---|
fear_greed | $0.005 |
gas_oracle | $0.005 |
ens_resolve | $0.005 |
defi_tvl | $0.01 |
defi_yields | $0.01 |
chain_tvl | $0.01 |
stablecoin_peg | $0.01 |
derivatives_funding | $0.01 |
trade_signal | $0.02 |
Prediction markets
| Tool | Price |
|---|---|
prediction_markets | $0.008 |
prediction_search | $0.005 |
prediction_market | $0.008 |
prediction_history | $0.008 |
Robinhood Chain (new L2, not covered by other providers)
| Tool | Price |
|---|---|
rhchain_health | $0.005 |
rhchain_wallet | $0.01 |
rhchain_wallet_score | $0.01 |
rhchain_token_screener | $0.008 |
rhchain_token_detail | $0.008 |
rhchain_tx | $0.005 |
rhchain_trending | $0.008 |
rhchain_burn | $0.005 |
Free: x402_list_paid_tools, x402_spend_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:
MAX_USD_PER_CALL(default0.05) - rejects any single payment above this, before signingMAX_USD_TOTAL(default5) - 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
Reviews
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