ArgentinaDatos API

Free Argentine data API with no key: historical dollar exchange rates across all market types (blue, oficial, MEP), inflation and holidays. Tested example.

No API key requiredCORS enabledHTTPSFree tier

Endpoint tested and returned HTTP 200 on 20 Aug 2026

What is the ArgentinaDatos API?

ArgentinaDatos is a free, key-free API providing Argentine economic data, most notably historical exchange rates for every dollar market type — oficial, blue, MEP, CCL and mayorista — plus inflation figures and public holidays.

Argentina has multiple simultaneous dollar exchange rates rather than one, and the gap between them is economically significant. This API is one of the few open sources tracking all of them together with full history.

The `casa` field identifies which market a rate belongs to — `oficial` is the government rate, `blue` the parallel market, `mep` and `ccl` financial routes. Presenting an Argentine peso conversion without saying which rate you used would be meaningless.

Quick facts

Base URL: https://api.argentinadatos.com/v1
Authentication: No API key required.
Rate limit: No published limit; fair use expected.
Pricing: Free and open source.
CORS: Enabled — callable directly from browser JavaScript
Official docs: Read the docs

How to use the ArgentinaDatos API

Every request below was executed against the live API on 20 Aug 2026, and the response shown is the real body it returned — not an illustration.

1. Fetch historical dollar exchange rates

GET https://api.argentinadatos.com/v1/cotizaciones/dolares

curl

curl 'https://api.argentinadatos.com/v1/cotizaciones/dolares'

JavaScript (fetch)

const res = await fetch("https://api.argentinadatos.com/v1/cotizaciones/dolares");
if (!res.ok) throw new Error(`Request failed: ${res.status}`);
const data = await res.json();
console.log(data);

Python (requests)

import requests

res = requests.get("https://api.argentinadatos.com/v1/cotizaciones/dolares", timeout=20)
res.raise_for_status()
print(res.json())

Response — HTTP 200 (truncated)

[
  {
    "casa": "blue",
    "compra": 4,
    "venta": 4,
    "fecha": "2011-01-03"
  },
  {
    "casa": "mayorista",
    "compra": 3.97,
    "venta": 3.98,
    "fecha": "2011-01-03"
  },
  {
    "casa": "oficial",
    "compra": 4,
    "venta": 4,
    "fecha": "2011-01-03"
  },
  {
    "casa": "blue",
    "compra": 4,
    "venta": 4,
    "fecha": "2011-01-04"
  },
  {
    "casa": "mayorista",
    "compra": 3.97,
    "venta": 3.98,
    "fecha": "2011-01-04"
  },
  {
    "casa": "oficial",
    "compra": 4,
    "venta": 4,
    "fecha": "2011-01-04"
  },
  {
    "casa": "blue",
    "compra": 4,
    "venta": 4,
    "fecha": "2011-01-05"
  },
  {
    "casa": "mayorista",
    "compra": 3.97,
    "venta": 3.98,
    "fecha": "2011-01-05"
  },
  {
    "casa": "oficial",
    "compra": 4,
    "venta": 4,
    "fecha": "2011-01-05"
  },
  {
    "casa": "blue",
    "compra": 4,
    "venta": 4,
    "fecha": "2011-01-06"
  },
  {
    "casa": "mayorista",
    "compra": 3.97,
    "venta": 3.98,
    "fecha": "2011-01-06"
  },
  {
    "casa": "oficial",
    "compra": 4,
    "venta": 4,
    "fecha": "2011-01-06"
  },
  {
    "casa": "blue",
    "compra": 4,
    "venta": 4,
    "fecha": "2011-01-07"
  },
  {
    "casa": "mayorista",
    "compra": 3.97,
    "venta": 3.98,
    "fecha": "2011-01-07"
  },
  {
    "casa": "oficial",
    "compra": 4,
    "venta": 4,
    "fecha": "2011-01-07"
  },
  {
    "casa": "blue",
    "compra": 4,
    "venta": 4,
    "fecha": "2011-01-08"
  },
  {
    "casa": "mayorista",
    "compra": 3.97,
    "venta": 3.98,
    "fecha": "2011-01-08"
  },
  {
    "casa": "ofic

Parameters

Parameter	Type	Required	Description
`cotizaciones/dolares`	path	Optional	Full historical series for all dollar types. `cotizaciones/dolares`
`cotizaciones/dolares/<casa>`	path	Optional	One market type only. `cotizaciones/dolares/blue`
`finanzas/indices/inflacion`	path	Optional	Monthly inflation figures. `finanzas/indices/inflacion`
`feriados/<year>`	path	Optional	Argentine public holidays. `feriados/2026`

Response fields

casastring: Market type — oficial, blue, mep, ccl, mayorista, tarjeta, cripto.
compranumber: Buy rate in pesos per dollar.
ventanumber: Sell rate in pesos per dollar.
fechastring: Date of the quote as YYYY-MM-DD.
(inflacion) valornumber: Monthly inflation percentage.

What you can build with the ArgentinaDatos API

Show Argentine peso conversions using the correct market rate
Chart the gap between official and parallel dollar rates
Analyse Argentine inflation trends
Build financial tooling for the Argentine market

Common errors and how to fix them

Very large response

The full series goes back to 2011 across all market types.

Fix: Request a specific `casa` to reduce the payload substantially.

Which rate to use

Multiple simultaneous rates exist.

Fix: State explicitly which one you are using; `blue` and `oficial` can differ by a wide margin.

Gaps in the series

Some market types started later than others.

Fix: Do not assume every date has every casa.

ArgentinaDatos API — frequently asked questions

Is ArgentinaDatos free?

Yes, completely free and open source with no API key.

Why are there several dollar exchange rates?

Argentina operates multiple simultaneous rates — oficial is the government rate, blue the parallel market, and MEP and CCL are financial routes. The gaps between them are economically significant.

Which rate should I use for conversions?

It depends entirely on context, and you should always label which one you used. The blue rate reflects what people actually transact at informally; oficial is the government figure.

How far back does the data go?

To 2011 for the main dollar series, though individual market types started at different points.

Tools that pair with this API

JSON Formatter

Format, beautify and minify JSON online with 2-space, 4-space or tab indentation. Sort keys alphabetically and catch syntax errors instantly — free and private.

Percentage Calculator

Calculate what X% of a number is, what percent one number is of another, and percentage increase or decrease between two values — instantly and free.

CSV to JSON Converter

Convert CSV to a JSON array of objects online. Header-row detection, comma/semicolon/tab delimiters and pretty-printed output — 100% in your browser.

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ArgentinaDatos is an independent third-party service and is not affiliated with ByteTools or ByteVancer. Details on this page were verified on 20 Aug 2026; always check the official documentation before relying on this API in production, as terms and limits can change.