OpenSEO is the open source Ahrefs with a data bill attached

OpenSEO is an open source SEO tool for keyword research, rank tracking, backlinks, and site audits. It exposes all of it to your AI agent through an MCP server. The software is free, but the search data is not. Every lookup bills your own DataForSEO key, and the hosted service adds 28 percent. Key Takeaways OpenSEO covers the Ahrefs jobs most people actually use. A thousand Google results pages…