Alpaca Trading & Market Data API
by Alpaca
Commission-free stock and crypto trading API. Real-time market data, trade execution, portfolio management for US equities and cryptocurrencies.
by SEC Filings Intelligence
Real-time access to US public company SEC filings, including full-text search, metadata, and extracted item sections (10-K, 10-Q, 8-K).
Install the x402 MCP server to let your AI agent access this data with automatic USDC payments on Base.
Required: You need a SerenDB database to store query results.
Get your connection string from the SerenDB Console under your database settings.
Add to claude_desktop_config.json:
{
"mcpServers": {
"x402": {
"command": "npx",
"args": ["@serendb/x402-mcp-server"],
"env": {
"X402_GATEWAY_URL": "https://x402.serendb.com",
"WALLET_PRIVATE_KEY": "0x...",
"BASE_RPC_URL": "https://mainnet.base.org",
"SERENDB_CONNECTION_STRING": "postgresql://..."
}
}
}
}Replace 0x... with your wallet private key and postgresql://... with your SerenDB connection string.
claude mcp add x402 \ -e X402_GATEWAY_URL=https://x402.serendb.com \ -e WALLET_PRIVATE_KEY=0x... \ -e BASE_RPC_URL=https://mainnet.base.org \ -e "SERENDB_CONNECTION_STRING=postgresql://..." \ -- npx -y @serendb/x402-mcp-server
claude mcp add x402 ` -e X402_GATEWAY_URL=https://x402.serendb.com ` -e WALLET_PRIVATE_KEY=0x... ` -e BASE_RPC_URL=https://mainnet.base.org ` -e "SERENDB_CONNECTION_STRING=postgresql://..." ` '--' npx -y @serendb/x402-mcp-server
Replace 0x... with your wallet private key and postgresql://... with your SerenDB connection string.
gemini mcp add x402 \ -e X402_GATEWAY_URL=https://x402.serendb.com \ -e WALLET_PRIVATE_KEY=0x... \ -e BASE_RPC_URL=https://mainnet.base.org \ -e "SERENDB_CONNECTION_STRING=postgresql://..." \ -- npx -y @serendb/x402-mcp-server
Replace 0x... with your wallet private key and postgresql://... with your SerenDB connection string.
codex mcp add x402 \ --env X402_GATEWAY_URL=https://x402.serendb.com \ --env WALLET_PRIVATE_KEY=0x... \ --env BASE_RPC_URL=https://mainnet.base.org \ --env "SERENDB_CONNECTION_STRING=postgresql://..." \ -- npx -y @serendb/x402-mcp-server
Important: Cursor has a 60s timeout. Pre-install globally first: npm install -g @serendb/x402-mcp-server
First, install globally to avoid timeout issues:
npm install -g @serendb/x402-mcp-server
Then add to ~/.cursor/mcp.json:
{
"mcpServers": {
"x402": {
"command": "x402-mcp-server",
"args": [],
"env": {
"X402_GATEWAY_URL": "https://x402.serendb.com",
"WALLET_PRIVATE_KEY": "0x...",
"BASE_RPC_URL": "https://mainnet.base.org",
"SERENDB_CONNECTION_STRING": "postgresql://..."
}
}
}
}Also works with Windsurf, Zed, and other MCP-compatible clients. See the full setup guide for details.
Access data directly via HTTP using the x402 payment protocol.
HTTP 402 with payment requirements (amount, wallet, EIP-712 data)X-PAYMENT header containing the signaturecurl -X POST https://x402.serendb.com/api/query \
-H "Content-Type: application/json" \
-d '{
"sql": "SELECT * FROM your_table LIMIT 10",
"publisherId": "4d4f0175-7fed-411e-8ad5-c206b9824e28",
"agentWallet": "0xYourWalletAddress"
}'This returns 402 Payment Required with the payment details you need to sign.
After signing the EIP-712 authorization, add the base64-encoded signature:
curl -X POST https://x402.serendb.com/api/query \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <base64-encoded-signature>" \
-d '{ ... }'Pay per 1K rows via x402 protocol
by Alpaca
Commission-free stock and crypto trading API. Real-time market data, trade execution, portfolio management for US equities and cryptocurrencies.
by Massive
Real-time and historical market data from Massive. Access trades, last trade prices, OHLC aggregates, market snapshots, and technical indicators (SMA, EMA, MACD, RSI) for stocks, forex, and bonds. Full coverage of global equity markets, currency pairs, and fixed income instruments.