Discover / usaref.dev

Usaref - N America reference

□ No challenge detected

Statutory income tax on a taxable-income figure: per-bracket workings, effective + marginal rate

x402
Base
USDC
Data

Listed price: $0.05
Challenge detected: 3 of the last 9 checks
Median response: 1069 ms
Last checked: 16 Oct, 18:49 UTC
In our index since: 26 Sept 2026

Endpoint

curl -i https://usaref.dev/v1/answers/income-tax
# 402 Payment Required: pay with an x402 client (USDC on Base),
# then send the same request again with the payment attached.

12 listed endpoints · on x402 Bazaar

Checks and payment terms on this page refer to the endpoint above. Other listed endpoints have not been checked individually.

Base URLhttps://usaref.dev/v1

POST/answers/working-days$0.02Working days / next working day in a date range: weekends + gazetted public holidays
GET/all$0.02Snapshot of every series, all countries
POST/answers/statutory-interest$0.05Simple statutory interest on a principal at the cited statutory-interest series rate (Actual/365 simple). A series with no numeric rate is refused free
POST/answers/employment-cost$0.1Cost to employ: every statutory contribution priced line by line, employee and employer sides separated, with the schemes we will not price named and reasoned
GET/:country/:series/history$0.005Canada: Policy Interest Rate — gazette-cited JSON with last_confirmed and stale.
GET/certified/:country/:series$0.25Mexico: IVA standard rate — gazette-cited JSON with last_confirmed and stale.
POST/answers/vat$0.02VAT rate gross-up or extract for an amount: net/tax/gross incl. statutory levy components
POST/answers/settlement-date$0.05Settlement/value date: T+n business days across national statutory calendars (intersected), with the market cycle cited to its primary source and a per-day trail
POST/answers/income-tax$0.05Statutory income tax on a taxable-income figure: per-bracket workings, effective + marginal rate
POST/answers/wage-check$0.05Wage check: is this salary legal vs statutory minimum wage? Verdict + margin + instrument
GET/:country/:series$0.005North American official government reference data as cited JSON, every covered country: income and corporate tax, VAT/GST, CPI inflation, central-bank policy rate, minimum wage, public holidays, business days, official exchange rate, statutory interest, social contributions. Each value has source URL, effective date, last_confirmed, stale. GET /v1/{country}/{series}, e.g. /v1/us/policy-rate.
POST/vat/determine$0.1Cross-border VAT treatment for a digital-services sale: place of supply, who accounts, rate basis, registration trigger — the applied rule cited to the statute (EU, UK & South Africa; defined supply pairs)

A dash means the listing gives no price or method. Copy buttons copy the full URL.

Showing 12 of 12 listed endpoints.

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/usaref.dev

Recent checks

29 Sept 2026One bar per check, showing up to 20 recent checks. Coloured bars show relative response time, with a minimum visible height; full-height grey bars mean no challenge was detected. “Challenge detected” means HTTP 402 or another detected payment-challenge signal.16 Oct 2026

All 9 checks

When (UTC)	Result	HTTP	Response
16 Oct, 18:49 UTC	No challenge detected	200	1062ms
15 Oct, 08:20 UTC	No challenge detected	200	1096ms
13 Oct, 22:50 UTC	No challenge detected	200	991ms
11 Oct, 19:34 UTC	No challenge detected	200	1021ms
10 Oct, 03:32 UTC	No challenge detected	200	1012ms
8 Oct, 21:32 UTC	No challenge detected	200	994ms
7 Oct, 18:39 UTC	Challenge detected	402	1006ms
6 Oct, 15:34 UTC	Challenge detected	402	1069ms
29 Sept, 17:03 UTC	Challenge detected	402	1241ms

Questions

Did our last probe detect a payment challenge?

No. At our last probe on 16 Oct, 18:49 UTC, we detected no payment challenge.

What price is recorded for Usaref - N America reference?

Its listed price is $0.05.

What payment terms does Usaref - N America reference advertise?

The listing advertises x402, Base and USDC. It names cdp as its facilitator. Check the seller's current payment challenge and authentication requirements before paying.

Where is Usaref - N America reference listed?

In x402 Bazaar and x402-list.com. Superstables first indexed it on 26 Sept 2026.

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