Free Claude Code plugin for SEO, AEO, and GEO. Audit sites, optimize content, generate schema, and track AI visibility across ChatGPT, Claude, Gemini, Perplexity, Copilot, and Google AI Overviews.

Free web search provider for DeepSeek Harness - DuckDuckGo backend, no API key needed

Open-source deep research for AI agents: 40 channels, 10+ Chinese sources.