"uBlock Origin" matching MCP connectors:

Call get_quote, then buy_kit (49 USDC Base x402). Humans keep #pay.

x402 MCP get-paid path: USDC, spend caps, AUP, $49 kit. CAPTCHA/web-unlock for payment-ready agents.

Lossless Uniswap V3 historical tick data streams and sandboxed parametric backtesting matrix sweeps on Base Mainnet. Implements the automated Coinbase x402-express stablecoin paywall protocol ($1 streams / $5 archives / $25 matrix simulations). Fully compatible with @coinbase/agentkit and LangChain.