Facebook Marketplace MCP
Uses internal GraphQL protocol directly instead of slow browser automation.

Unified marketplace search with GrabScore pricing, but Google Shopping already aggregates most of these.
Secondhand shoppers and resellers
Google Shopping · Shpock · Letgo
Uses internal GraphQL protocol directly instead of slow browser automation.
Finally, a Kayak for GPU rentals when Vast.ai and RunPod data is scattered.
Deterministic deal scoring using Tukey-trimmed eBay comps beats vague 'market value' estimates.
AI asset appraisals for Facebook Marketplace arbitrage, insurance, and lending workflows.
Centralized MCP gateway that solves API key security and client fragmentation for AI agents.
Ambitious decentralized marketplace, but needs stores and shoppers to actually work.