Production sites sit behind DataDome, Akamai or Cloudflare bot walls. Plain HTTP requests die at the TLS handshake.
Python agents (LangChain, AutoGen, raw requests) all fail on Bestbuy's bot wall. One POST to Plaza's x402 endpoint returns parsed JSON instead of a 403.
POST https://x402-plaza-services.onrender.com/mcp - x402 payment in USDC on Base. Catalog: https://x402-plaza-services.onrender.com/catalog
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