goldbean
x402 Micropaid MCP Server — 51 Baidu AI tools for global developers. Pay-per-call with USDC, PayPal, or Alipay. No Chinese phone number needed.
Documentation
🫘 GoldBean - x402 Micropaid API Marketplace
> Pay per request with USDC on Base. No signup, no API key, no monthly subscription.
> Every call costs $0.02 USDC via the x402 protocol.
GoldBean is live: `http://104.225.233.23:9879`
Quick Start
1. Prerequisites
- USDC on Base (`eip155:84532` testnet or `eip155:8453` mainnet)
- A wallet that can sign x402 payments (AgentCash, CDP Wallet, or any EVM wallet)
2. Try a Free Endpoint
curl http://104.225.233.23:9879/health
# {"status":"ok","service":"GoldBean","timestamp":"2026-05-15T12:00:00.000Z"}
curl http://104.225.233.23:9879/eth-price
# {"usd":"2255.93","change24h":"+0.31%","timestamp":"2026-05-15T12:00:00.000Z"}3. Call a Paid Endpoint
curl http://104.225.233.23:9879/paid/btc-price
# HTTP 402 Payment Required
# x402-challenge: {...}To pay the 402 and get data, you need an x402-capable client:
Using AgentCash:
npx agentcash@latest fetch http://104.225.233.23:9879/paid/btc-priceUsing x402-proxy (CLI tool):
npx x402-proxy http://104.225.233.23:9879/paid/btc-priceUsing curl with manual payment (advanced):
# Step 1: Request triggers 402
curl -s -D - http://104.225.233.23:9879/paid/btc-price
# Step 2: Parse x402-challenge header, sign with your wallet
# Step 3: Retry with x402-payment header
curl -H "x402-payment: " http://104.225.233.23:9879/paid/btc-price4. MCP Integration
Add to Claude Desktop / Cursor / Cline `mcpServers` config:
{
"mcpServers": {
"goldbean": {
"url": "http://104.225.233.23:9879/mcp"
}
}
}Available Endpoints
Free (no payment needed)
| Endpoint | Description |
|---|---|
| `GET /` | Service info & endpoint list |
| `GET /health` | Health check |
| `GET /eth-price` | Real-time ETH price (via CoinGecko) |
| `GET /gas` | ETH gas price estimate |
| `GET /card` | Service card / metadata |
| `GET /mcp` | MCP protocol manifest |
Paid ($0.02 USDC per call)
| Endpoint | Description |
|---|---|
| `GET /paid/btc-price` | Real-time BTC price (via CoinGecko) |
| `GET /paid/gas-forecast` | Gas price forecast |
| `GET /paid/market-intel` | Market sentiment & Fear & Greed Index |
| `GET /paid/defi-insights` | DeFi TVL & chain data |
| `GET /paid/network-health` | Blockchain network health |
| `GET /paid/tracker-report` | MEV & on-chain tracker report |
| `GET /paid/sol-token-risk` | Solana token risk assessment |
How x402 Payment Works
Client GoldBean Server
│ │
├─ GET /paid/btc-price ─────────────┤
│◄─ 402 Payment Required ───────────┤
│ x402-challenge: {...} │
│ │
├─ Sign challenge with wallet ──────┤
│ (off-chain, no gas fee) │
│ │
├─ GET /paid/btc-price ─────────────┤
│ x402-payment: │
│◄─ 200 OK ─────────────────────────┤
│ {"usd":"68000.00",...} │
│ │The facilitator (`x402.org`) handles settlement. Your wallet sends USDC only when challenge is accepted. No recurring charges.
Data Sources
- CoinGecko API — Real-time cryptocurrency prices
- Etherscan API — Gas price oracle
- Alternative.me — Fear & Greed Index
Seller Info
- Seller wallet: `0xB5f5CBe48E0595C044Bc626f278F757463eAc2Ce` (Base)
- Network: `eip155:84532` (Base Sepolia testnet) → migrating to `eip155:8453` (Base mainnet)
- Facilitator: `https://x402.org/facilitator`
- Price: $0.02 USDC per paid call
Architecture
┌─────────────┐ x402 protocol ┌──────────────┐
│ Client │ ◄─────────────────────► │ VPS (USCA) │
│ (curl/Agent)│ HTTP + 402 flow │ GoldBean 🫘 │
└─────────────┘ │ :9879 │
│ └──────┬───────┘
│ ┌──────────────┐ │
└────────►│ Email │◄─────────────┘
│ (Gmail) │ Monitor alerts
│ Monitor │
└──────────────┘Development
# Server
cd /opt/goldbean
npm install express axios @x402/express @x402/core @x402/evm
node server.js
# Monitor
python3 /opt/goldbean/chain_monitor.pyEcosystem
*Built on Bandwagon VPS (USCA-2). Part of the x402 ecosystem.*
Frequently asked questions
What is goldbean?
goldbean is x402 Micropaid MCP Server — 51 Baidu AI tools for global developers. Pay-per-call with USDC, PayPal, or Alipay. No Chinese phone number needed.
How do I install goldbean?
Open the GitHub repository and follow its README. Most MCP servers are added to your client's MCP config, then called by your agent.
Is goldbean open source?
Yes — it is hosted on GitHub at https://github.com/wuzenghai616-lang/goldbean and has 1 stars.
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