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Duo Data Utilities – Country Lookup
x402
Duo Data Utilities – Country Lookup is a paid API for AI agents from api.duoleads.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-02).
Look up a country or territory by ISO 3166-1 code or name and return all codes, the English name, UN M49 region/sub-region, currencies, and ccTLD.
Price / call$0.05
Success—
StatusUnknown
How this service works
Look up a country or territory by ISO 3166-1 alpha-2, alpha-3 or numeric code, or by name, and get the other codes, the official and common English names, the UN M49 region and sub-region, the currencies in use, the country-code top-level domain, and optionally the full ISO 3166-2 subdivision list with each subdivision's type. Also resolves an ISO 3166-2 subdivision code such as NL-NH directly. Names are matched case- and accent-insensitively.
Output
A JSON object containing the matched country's alpha-2, alpha-3, and numeric ISO codes; official English name; UN M49 region and sub-region names and codes; list of currencies in use; and country-code top-level domain (ccTLD). Also includes metadata: request ID, computation timestamp, price, and data source attributions.
Example use cases
Currency lookup for checkout flow
“I'm building a checkout form and need to know what currency is used in Japan — can you look it up by country name and give me the ISO currency code?”
ccTLD resolution for domain registration
“I want to register a local domain for Brazil — what's Brazil's country-code top-level domain? Look it up by its ISO alpha-2 code 'BR'.”
Normalize country codes in a dataset
“I have a dataset with entries using the 3-letter code 'DEU' — can you resolve that to the alpha-2 code, numeric code, and confirm the official country name for me?”
Technical details
Endpoint
GEThttps://api.duoleads.com/v1/ref/country?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need authoritative, multi-standard country reference data in a single call — especially when you need to cross-reference ISO 3166-1 codes (alpha-2, alpha-3, numeric), UN M49 regions, currencies, and ccTLDs together. Prefer it over manual lookups or general-purpose LLM knowledge when accuracy, up-to-date sourcing, and structured output are required. It supports both code-based and name-based (case/accent-insensitive substring) lookups, making it flexible for data normalization pipelines.
Side effects
- Country not found for the given code or name substring — returns found: false
- Ambiguous name substring matching multiple countries — may return unexpected result or require more specific input
- Invalid or malformed code format — may return error or no match
- Network timeout or service unavailability — HTTP 5xx error
- Missing required query parameter (no code or name provided) — HTTP 4xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"data": {
"m49": {
"region": "150",
"subregion": "155",
"region_name": "Europe",
"intermediate": null,
"subregion_name": "Western Europe",
"intermediate_name": null
},
"tld": [
".nl"
],
"kind": "country",
"name": "Netherlands",
"found": true,
"alpha_2": "NL",
"alpha_3": "NLD",
"numeric": "528",
"currencies": [
"EUR"
],
"official_name": "Netherlands"
},
"meta": {
"sources": [
{
"id": "iso-codes",
"licence": "LGPL-2.1-or-later",
"version": "Debian iso-codes data/iso_3166-2.json, retrieved 2026-09-28",
"published": "2026-09-28",
"attribution": "ISO 3166-2 subdivision data from Debian iso-codes (https://salsa.debian.org/iso-codes-team/iso-codes), (c) 2016 Dr. Tobias Quathamer, LGPL-2.1-or-later"
},
{
"id": "country-codes",
"licence": "PDDL-1.0",
"version": "datasets/country-codes, retrieved 2026-09-28",
"published": "2026-09-28",
"attribution": "Open Knowledge Foundation datasets/country-codes (ISO 3166-1 codes)"
},
{
"id": "cldr",
"licence": "Unicode-3.0",
"version": "48.2.2",
"published": "2026-09-28",
"attribution": "Unicode CLDR, © Unicode, Inc."
}
],
"price_usd": "0.05",
"disclaimer": "Factual output of a deterministic computation over public data. Provided as is, with no warranty of accuracy, completeness or availability. Not investment, financial, legal, tax, medical or any other professional advice, and not a recommendation. Verify before relying on it. Terms: https://api.duoleads.com/terms",
"request_id": "01K6B7Q4ZC8H3F2M9WXR5TYN0D",
"computed_at": "2026-09-28T12:00:00.000Z",
"deterministic": true
},
"route": "/v1/ref/country",
"version": "1.0.0"
}
}Tags
x402
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