SoldStack

SoldStack is a data service that provides clean sold pricing for secondhand fashion items through an API to help resellers determine accurate market values.

SoldStack provides an API that returns cleaned sold pricing data for secondhand clothes, shoes, and bags. It automatically filters out irrelevant listings like bundles, duplicates, kids' sizes, and off-topic titles to ensure the price describes the specific item searched. The service returns data points including median prices, days to sell, estimated net payouts after marketplace fees, and a buy or pass verdict. It integrates with tools like Google Sheets and AI agents to assist with inventory valuation and resale decision-making. The system fetches live data from Poshmark and caches results for six hours. It also functions as a remote MCP server for direct compatibility with AI clients.

SoldStack at a glance

Best for: Founder, Marketer
Runs on: API, Google Sheets, MCP server
Pricing: Free plan (100 lookups/month); $5 one-month pass (2,500 lookups); Launch week 50% off first 3 months with code LAUNCH50.
Released: October 2026
Category: AI productivity tool
Website: soldstack.fly.dev

Key features

Returns median price and estimated net payout
Filters out bundles, kids' sizes, and duplicates
Provides buy or pass verdicts for inventory
Calculates days to sell for price trend analysis
Functions as a remote MCP server for AI agents
Caches search results for six hours

Use it for

Scanning thrift store items to decide whether to buy
Populating listing price fields automatically
Calculating potential profit in Google Sheets
Pricing inventory for resale or consignment

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