OpenSEO

Open source Semrush and Ahrefs alternative with a native MCP server and agent skills

About

Open source SEO suite your agent can query over MCP

OpenSEO by Ben Senescu (@bensenescu) is an MIT-licensed alternative to Semrush and Ahrefs that skips the big monthly subscription. Data comes from DataForSEO and you pay only for the requests you make: bring your own API key when self-hosting (Docker for personal use, Cloudflare free plan for teams), or use the hosted version at openseo.so, which adds a markup on each DataForSEO request and offers an optional $10 per month supporter plan. The core workflows are keyword research, rank tracking, competitor insights, backlinks, site audits and AI visibility tracking. What makes it interesting for agent users is that it was built agent-first: a native MCP server lets Claude Code, Codex, ChatGPT (free and paid plans), OpenClaw or Hermes pull keyword and backlink data straight into a conversation, and prebuilt agent skills walk the agent through common SEO tasks. You can also fork it and vibe code your own custom SEO tool on top. The repo passed 24K GitHub stars in October 2026.

Features

Keyword research, rank tracking, competitor insights, backlinks, site audits and AI visibility
Native MCP server for Claude Code, Codex, ChatGPT, OpenClaw and Hermes
Prebuilt agent skills for common SEO workflows
Pay-as-you-go via DataForSEO instead of a monthly subscription
Self-host with Docker or Cloudflare, or use the hosted version