Connects Claude to the J-Quants API v2 for Japanese stock market data. Ships with 51 tools covering equities, financials, sector performance, technical indicators, and screeners. The implementation includes a two-tier SQLite cache with automatic split detection, plan-aware rate limiting (Free through Premium tiers), and built-in retry logic for API failures. Configuration is zero-touch if you already use jquants-api-client. Deployment options range from stdio in Claude Desktop to self-hosted HTTP with GitHub or Google OAuth for multi-user scenarios. Useful if you're building equity research workflows, tracking Nikkei constituents, or running quantitative screens on Japanese markets without writing your own API client.
claude mcp add --transport stdio shigechika-jquants-mcp -- uvx jquants-mcp