Slabfy MCP Server provides AI agents with access to sports card market intelligence tools. Public tools include card market sentiment analysis, card valuation with real-time comps, grade ladder ROI analysis across PSA/BGS/SGC/CGC, and market liquidity scoring. Authenticated tools unlock portfolio management, buying desk evaluations, eBay listing automation, and more. Uses Streamable HTTP transport with OAuth 2.1 + PKCE for authenticated access.