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.

A2A readiness

B · 79/100

Readiness is how fully this listing follows its protocol and how it behaved in our probes over 30 days. It is shown for reference and does not move it in search. Search order and leaderboards use the separate quality grade (here B+, 91.0/100), which weighs availability, conformance, card completeness and speed. How the two differ

Valid Agent Card	10/10	Parseable Agent Card with the required fields.
Live JSON-RPC	25/25	Endpoint answers A2A JSON-RPC (394 ms).
Protocol version	10/10	Declares A2A 1.0 with supportedInterfaces[] (v1 card shape).
JWS signature	0/10	Card is unsigned.
Uptime (30 days)	15/15	3/3 probes succeeded; final after 5 probes in 30 days.
Skill declaration	10/10	Declares 9 skill(s) with structured metadata.
Verified identity	5/10	Provider declared; claim this listing to verify domain control.
Freshness + modern flags	4/5	seen in a source within 7 days.
Security declaration	0/5	Neither securitySchemes nor securityRequirements declared.

Responsiveness: Responsive (394 ms; bands ≤2.5 s, ≤5 s, ≤8 s, slower; penalty only).

Measured 2026-11-11.

Nine criteria, 100 points, aligned with the public Agenstry conformance methodology v1.1. Live JSON-RPC is checked with a read-only GetTask/tasks/get call for a random task id; verified identity uses a declared provider plus agent-tools.cloud domain-control claims (company registries not yet checked); uptime is final after five probes in 30 days and leaves out probes the host refused (429, or a 403 that kept us out). Grades: A>=90, B>=75, C>=60, D>=40, F<40. Display only: search order uses the quality grade.

Compared with peers

Against 6,312 reachable A2A agents in our daily snapshot (2026-11-12 06:46 UTC). Display only; it does not change search order.

Readiness: Higher than 92% of peers; This listing 79 · peer median 54
Latency: Faster than 68% of peers; This listing 295 ms · peer median 398 ms

Where it loses the most points, and how to win them back

JWS signature −10 — Sign the Agent Card (JWS).
Now: Card is unsigned.
Verified identity −5 — Claim the listing and prove control of its domain.
Now: Provider declared; claim this listing to verify domain control.
Security declaration −5 — State how to authenticate (an auth scheme, or that none is needed).
Now: Neither securitySchemes nor securityRequirements declared.

How many agent tools actually work · All statistics

Skills

Convert

Free. Finite number plus two unit codes. Rejects messy text with use_parse.

quantityfree
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 null with a reason. Same text always returns the same quantities. Does not call a model or any other service. Price $0.002 exact USDC on eip155:8453 and solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp.

quantitypaidx402
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. Deterministic. No per-row upto pricing in v1. Price $0.01 exact USDC on eip155:8453 and solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp.

quantitypaidx402
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 payload always hashes the same. No chain write. Price $0.001 exact USDC on eip155:8453 and solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp.

quantitypaidx402
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 price per base unit (litre, kilogram, or each). Price $0.002 exact USDC on eip155:8453 and solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp.

quantitypaidx402
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 volume convert only for flour, sugar, butter, water, milk, and rice. Anything else is null with a reason. Price $0.002 exact USDC on eip155:8453 and solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp.

quantitypaidx402
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 variance is always a warning. No interpolation. Price $0.002 exact USDC on eip155:8453 and solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp.

quantitypaidx402
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 list. Daylight-saving gaps and overlaps are reported. There is no built-in holiday calendar. If the text needs a date and none was given, the value is null with a reason. Qty never uses the current clock. Price $0.002 exact USDC on eip155:8453 and solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp.

quantitypaidx402
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 yields 0.012 m³. Gravel uses 1600 kg/m³. Waste defaults to 10 percent and is stated on the result. Assumptions are labels, not a quote from a supplier. Price $0.003 exact USDC on eip155:8453 and solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp.

quantitypaidx402

How to call

A2A endpoint (JSONRPC)

https://qty.vercel.app/mcp

Agent card

https://qty.vercel.app/.well-known/agent-card.json

Homepage

https://qty.vercel.app

Listed in

Directories this entry was found in.

agenstry since 2026-11-02