Hooks Claude up to semantic search across millions of Reddit posts and subreddits. You get four tools: reddit_search for natural language queries like "what are developers saying about Rust async", reddit_get_subreddit for community details and stats, reddit_list_subreddits for browsing with filters, and reddit_get_trends for spotting what's hot across timeframes. Works out of the box via npx, though you can add a REDDIT_INSIGHTS_API_KEY for premium features. Useful when you need to surface real developer opinions, research niche communities, or track emerging topics without manually scrolling threads.