SoldStack makes secondhand sale prices queryable by agents under usage-based plans
A resale-pricing database is packaging cleaned comps and verdicts for direct use by machines.
SoldStack cleans Poshmark sold listings into comparable sales, pricing ranges, time-to-sell measures and buy-or-pass verdicts, with data refreshed and cached for six hours. The same API key works in Google Sheets and a remote MCP server for agent clients, while access ranges from 100 free monthly lookups to metered plans including a $5 pass for 2,500 requests. The service turns proprietary data cleaning into a machine-consumable information layer that can earn revenue inside third-party agent workflows rather than through a destination site.