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I put an MCP server behind HTTP 402. Here's the exact setup.

AI agents are hitting APIs thousands of times a day and paying nothing. I wanted to know if the "pay per call" story is real or slideware, so I built the smallest possible version: my own knowledge…

  • AI researcher builds pay-per-query knowledge base on Base blockchain
  • @x402/mcp package with StreamableHTTP transport via Express used
  • Server runs on Google Cloud e2-micro free-tier VM

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