For AI agents & developers

Give your shopping or resale agent second-hand price context, confidence and market basis in one request.

What agents use it for

Price an item before buying — low / typical / high with confidence.
Check whether an asking price is good — deal verdict against the tracked range.
Monitor tracked price history over time.

Every answer carries its basis (live asking prices vs real sold prices), sample size, confidence and freshness — so an agent can reason about uncertainty instead of trusting a black box.

Try it free first

MCP server — cached lookups are free, no payment needed.
Free sample dataset — 100 items, no signup.
/health — service status, always free.

Fresh lookups and the HTTP API settle per call via x402 (below).

Endpoints

Endpoint	Returns	Price
`GET /api/worth?q=...`	Price estimate: low, typical, high	$0.01
`GET /api/deal?q=...&price=...`	Is this asking price a good deal?	$0.01
`GET /api/history?q=...`	Price history and trend	$0.02
`GET /api/sold?q=...`	Real sold prices from our own eBay shop	$0.01
`POST /api/batch`	Up to 10 items per call — JSON body {"items": ["..."]}, one result or error per item	$0.05
`GET /api/trends?category=...`	Category price trends: weekly average asking prices over 90 days	$0.01
`GET /api/top?category=...&limit=...`	Highest-priced tracked items in a category	$0.01
`GET /api/profit?q=...&buy=...`	Resale profit estimate: fees, postage, margin and break-even for a buy price	$0.01
`GET /health`	Service status and integrations	free

Payment flow (x402 v2)

1. curl -i "https://reusefulshop.com/api/worth?q=the+beatles+abbey+road+vinyl"
   → HTTP 402 + PAYMENT-REQUIRED header (price, asset, payTo, network)

2. agent signs a USDC payment on Base (exact scheme)

3. retry the same request with the payment header
   → HTTP 200 + data, settlement handled by a public x402 facilitator (no fees)

Network: eip155:8453 · asset: USDC · receive address: 0xb876145625B6ED670657116187aEF7fAcf1ac288

MCP server (for AI assistants)

Add reusefulshop as a tool in Claude, Cursor or any MCP-capable assistant:

MCP endpoint: https://reusefulshop.com/mcp   (Streamable HTTP)
tools: get_worth · check_deal · get_history · get_sold
Cached lookups are free via MCP; fresh fetches use the x402 paid API.

Tools return the latest tracked price instantly when available, and point to the free web page or paid API when an item is not yet tracked. Batch pricing is HTTP-API only — the MCP server exposes the four single-item tools.

Machine-readable discovery

/.well-known/x402.json — resource manifest with prices
/.well-known/agent-card.json — agent card
/llms.txt — summary for AI assistants
/sitemap.xml — indexed item pages
GitHub repo — x402 buyer example + MCP config (MIT)

Listed on agentmarketplace as reusefulshop/worth and discoverable through the x402 Bazaar extension on every 402 challenge.

Try it from a browser

Humans get 10 free browser lookups per day: