Hard-Capping MCP Tool Spend with SatGate Proxy

Your AI agent just burned $500 overnight calling Google Search in a loop. You found out when the bill arrived. Sound familiar? If you're running Claude Code, Cursor, or Claude Desktop with MCP tools, you've probably had a version of this moment. Maybe it was $50, maybe $5,000. The pattern is always the same: an agent gets stuck, loops on a tool call, and your API bill explodes while you sleep. There's a fix. And it doesn't involve monitoring dashboards, Slack alerts, or hoping you catch it in time. The Problem: MCP Has No Credit Card Limit The Model Context Protocol is brilliant at what it does: giving AI agents structured access to tools. Search engines, databases, code execution, image generation — MCP makes it all available through a clean JSON-RPC interface. What MCP doesn't do is care about cost. Every tools/call request flows through to the upstream server with no budget awareness whatsoever. The spec has no concept of "you've spent too much" or "stop here." This creates a specif