I Built Postman for MCP Servers Because Debugging JSON-RPC Shouldn't Be Hell

If you're building with the Model Context Protocol (MCP), you already know the pain. You write a server. You wire it up to Claude, Cursor, or your own agent. And then... you spend the next 3 hours running curl commands, squinting at raw JSON-RPC payloads, and guessing why your tool schema isn't bein