"author:imrane2019" matching MCP servers:

I built an MCP server that sells live trading data (XAUUSD/BTCUSD signals, market analysis) to AI agents, and the whole purchase flow — discover price, pay, get a key — happens inside one MCP session with no human involved. The interesting part isn't the trading data, it's the payment step: when an agent calls a paid tool without a key, it gets back a structured JSON-RPC error (HTTP 402-style, th