I run PDFHaul, a free browser and mobile PDF toolkit, as a solo founder. A few months ago I kept running into the same friction point: every time I wanted an AI assistant to help with a PDF task, I had to manually download the file, upload it somewhere, run the tool, then feed the result back into the conversation. For anything involving more than one file, that loop got old fast. So I built an MCP server for PDFHaul. This post covers what it does, how it's built, and a few of the harder deci...