About boo-x402-mcp
boo-x402-mcp is an MCP server for AI agents seeking crypto and Web3 data, charging per call in USDC on Base via x402 without API keys. It covers five chains and enforces per-call and session spending caps.
Key features
- 01Token and wallet safety data across five chains
- 02Market, DeFi, and prediction-market data
- 03Dedicated Robinhood Chain data tools
- 04Per-call USDC payments without API keys
- 05Per-call and session spending caps
Use cases
- 01Check token contracts and wallet risk
- 02Query prices, funding rates, and on-chain data
- 03Look up prediction markets and Robinhood Chain data
MCP support
It exposes crypto and Web3 data tools to MCP clients. Calls use x402 payments in USDC on Base, except for two free tools.
Configuration
Local server config is the same for every client. Copy it into your client’s MCP config file.
npx -y boo-x402-mcpWALLET_PRIVATE_KEYSecretPrivate key of a wallet holding USDC on Base. Stays on your machine.MAX_USD_PER_CALLMax USD per single call (default 0.05).MAX_USD_TOTALMax USD per session (default 5).Local servers need a runtime on your machine (e.g. Node.js 18+). Config file locations differ by client; see your client’s docs.
Tools
36Saved tool list · updated 2w ago
| Parameter | Type | Required | Description |
|---|---|---|---|
| chain | enum | Yes | Chain: eth, bnb, base, solana, or rhchain (Robinhood Chain).eth | bnb | base | solana | rhchain |
| token | string | Yes | Token contract address (0x... for EVM/Robinhood Chain, base58 mint for Solana). |
Details
From the project READMEboo-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
Comments
New to MCP?
From what the protocol is to installing your first server, these answers cover most first questions.
An open protocol that defines how AI applications connect to external tools and data in a uniform way. Clients talk to the model; MCP servers provide tools, resources and prompt templates. They exchange standard messages, so one server can be reused by many clients.