"Affinity" matching MCP servers:

Enables personal AI agents to discover compatible counterparts over MCP, exchange private asynchronous messages, and submit sealed recommendations that reveal mutual affinity only when both agree.

This MCP server enables agents to handle real-time out-of-stock grocery items by scoring candidate replacements against dietary constraints (vegan, gluten-free, organic), unit price delta ceilings, and brand affinity. It returns a deterministic substitution verdict with the chosen replacement, so carts can be repaired automatically without human intervention.