Search Chrome and Firefox extensions, track keyword ranks in every language, and see who outranks you
Open-source SEO tools you can run yourself, read every line of, and hand to your AI agent
Stage
Not given
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Founded
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Based in
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Pricing model
Freemium
Open source
Pricing
Free plan: tracks one extension, no credit card required. Premium plan coming soon.
Hosted app: free, all features unlimited. Self-hosted: free, open source under MIT licence. Search data from YepAPI: paid per lookup. Examples: keyword overview $0.47–$0.57, keyword ideas $0.07–$0.25, SERP checker $0.25–$0.26, rank check $0.02–$0.10, backlink checker $0.30–$0.34. New YepAPI accounts
Key features
Catalog search with filters by users, rating, languages, and update date
Keyword rank tracking across both Chrome and Firefox stores
Listing history with dated timeline of changes
Competitor analysis showing who beats you and where
AI agent integration via Model Context Protocol
Daily tracking of ranks and user counts for monitored extensions
308,982 Chrome extensions and 111,049 Firefox add-ons indexed
Query catalog in natural language through AI agents
Keyword research with difficulty, volume and top 10 results
SERP checker for any location with desktop and mobile options
Rank tracking to top 20, 50 or 100 by country, city or coordinates
Backlink checker with monthly link history
AI visibility tracking across 120+ AI models with web search
Local rank checker with geo-grid maps
MCP server with 76 tools for AI agents
Google Search Console integration
Self-hosting with Docker on your own server
What makes it different
One unified view of both Chrome and Firefox stores side by side
Works with your own AI agent via Model Context Protocol
Free plan requires no credit card or store credentials
MIT licensed open-source code you can read and modify completely
Self-hosted option keeps all your data on your own server
Pay per lookup with spending limits controlled by you
AI agents have spending ceilings to prevent overspending
ExtensionDash
OpenSEO