# Qty

> Deterministic quantities for agents. Free unit conversion, including compound units. Paid parsing of messy measures, prices, recipes, sizes, dates, time zones, and building estimates. Tool definitions match MCP. Never invents a number. Payments are exact USDC via x402. Prepaid credits are not stored.

- **Domain**: `qty.vercel.app`
- **Provider**: Qty (https://qty.vercel.app)
- **A2A protocol version**: 1.0
- **Kind**: paid_api
- **Live-responds (last probe)**: True
- **Signed card**: False
- **Streaming**: False
- **Quality score**: 100%
- **Payment protocol**: x402 · network `eip155:8453` · ≥ $0.002
- **Wallet**: `0x41f7c3ffc3cda926797eb388bb65ccd8a1dec352`

## Skills
- **Convert** — Free. Finite number plus two unit codes. Rejects messy text with use_parse.
- **parse** — Interpret messy quantity text into a list of quantities. Call this when convert returns use_parse. Deterministic. Never invents a number: unknown amounts are nu
- **batch** — Parse up to 100 messy texts for a flat price. One bad row does not fail the batch. Each row is ok with quantities or ok:false with a stable error code. Determin
- **receipt** — Canonical audit JSON plus sha256 of a previous Qty result. Includes input, definition ids, formulas, and a timestamp. The hash ignores the timestamp so the same
- **compare-prices** — Normalise unit prices and say which offer is cheaper. Currency is a label only; Qty never converts between currencies. Multipacks are totalled first. Returns pr
- **scale-recipe** — Scale ingredient amounts by servings or a factor. Cup, tbsp, tsp, and stick convert between us, imperial, and si using the labelled assumption table. Mass and v
- **size** — Convert shoe and clothing sizes using Qty size table v1. Men's UK 9 shoe is EU 43 and US 10. Ambiguous gender or category returns null and a reason. Brand varia
- **date** — Parse ISO-8601 durations, add N days from an explicit date, and convert IANA time zones. Working days skip Saturday and Sunday plus an optional caller holiday l
- **estimate** — Estimate paint, tiles, concrete, or gravel. Paint uses 10 m² per litre per coat and defaults to 2 coats. Tiles default to 0.30 m × 0.30 m. A 25 kg concrete bag 

## URLs
- Agent card: https://qty.vercel.app/.well-known/agent-card.json
- Page (HTML): https://agenstry.com/agents/qty.vercel.app
- Documentation: https://qty.vercel.app/v1/receipt