Stock Bloc is a financial-data MCP server and HTTP API for AI agents. Every priced call is paid per request with x402 (USDC on Base, eip155:8453). There are no free credits, no trials, no subscriptions, and no API key is needed to pay. An unpaid request returns HTTP 402 with a PAYMENT-REQUIRED header. Sign the payment and retry with the PAYMENT-SIGNATURE header. Prices (USDC per call): - $0.01 market data: GET /api/data/market, GET /api/v1/market/quote?symbol=AAPL - $0.05 SB Score: GET /api/v1/
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10/27/2026
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