Lichess

Connects Claude to Lichess's public API for chess data and analysis. You get player profiles and ratings across all variants, bulk user lookups, online status checks, and leaderboards. The real power is in the game analysis tools: cloud eval hits Stockfish for position evaluation, tablebase does endgame lookups for positions with seven pieces or fewer, and opening explorer queries community games, master games, or individual player repertoires. Hosted by Pipeworx as a streamable HTTP gateway, so no local installation. Useful when you're building chess coaching tools, doing player research, or need programmatic access to opening theory and engine analysis without running your own infrastructure.