frankfurter.currencies

stable Standard

Currencies supported by the ECB feed (code -> name).

GET /v1/frankfurter/currencies

What you get#

One Frankfurter record in Onekey's unified shape, in data. If the record does not exist you get a 404 not_found and are not charged.

What it costs#

Standard · 1 credit for a fresh fetch, charged only when it succeeds.
Free when served from cache (0.2 credit for a cached response over 100 KB).
Free if the request is invalid (never charged) or the source fails or reports not found (refunded).

Parameters#

This endpoint takes no parameters.

Request#

curl "https://api.onekey.dev/v1/frankfurter/currencies" \
  -H "x-api-key: YOUR_API_KEY"

Try it

Add your key to run this call right here. No key? Get one free. The key stays in this tab.

Recorded response#

A real Frankfurter response, recorded and returned in Onekey's shape. Fields the platform does not provide are null.

json

{
  "success": true,
  "data": {
    "ext": {
      "currencies": {
        "AUD": "Australian Dollar",
        "BRL": "Brazilian Real",
        "CAD": "Canadian Dollar",
        "CHF": "Swiss Franc",
        "CNY": "Chinese Renminbi Yuan",
        "CZK": "Czech Koruna",
        "DKK": "Danish Krone",
        "EUR": "Euro",
        "GBP": "British Pound",
        "HKD": "Hong Kong Dollar",
        "HUF": "Hungarian Forint",
        "IDR": "Indonesian Rupiah",
        "ILS": "Israeli New Shekel",
        "INR": "Indian Rupee",
        "ISK": "Icelandic Króna",
        "JPY": "Japanese Yen",
        "KRW": "South Korean Won",
        "MXN": "Mexican Peso",
        "MYR": "Malaysian Ringgit",
        "NOK": "Norwegian Krone",
        "NZD": "New Zealand Dollar",
        "PHP": "Philippine Peso",
        "PLN": "Polish Złoty",
        "RON": "Romanian Leu",
        "SEK": "Swedish Krona",
        "SGD": "Singapore Dollar",
        "THB": "Thai Baht",
        "TRY": "Turkish Lira",
        "USD": "United States Dollar",
        "ZAR": "South African Rand"
      }
    }
  },
  "metadata": {
    "platform": "frankfurter",
    "endpoint": "currencies",
    "cached": false,
    "stale": false,
    "age_s": 0,
    "fetched_at": "2026-01-01T12:00:00+00:00",
    "credits_charged": 1,
    "request_id": "7f3a9c2e5b1d4c8fa2e6d0b9c4f18e37"
  },
  "error": null
}

Field mapping#

How this endpoint's source fields become Onekey's unified schema. Fields the source lacks come back as null.

Source path	Onekey field	Transform
`(whole value)`	`ext.currencies`	-

Caching and freshness#

Fresh for about 1 hour. Repeat calls in that window are served from cache and are free.
Between 1 hour and 1 day the cached copy is still served instantly and marked stale: true while Onekey refreshes it in the background.
If the source is down when a refresh is needed, the last copy can be served for up to 1 day more (marked stale).
A "not found" is remembered for 5 minutes and is free.
The cache is shared across all customers, which is what keeps repeat calls cheap.

What can go wrong#

Status	Code	What to do
401	`unauthorized`	Check the `x-api-key` header.
402	`insufficient_credits`	Add credits; your balance must cover the price.
404	`not_found`	That record does not exist. Free; do not retry.
422	`invalid_params`	Fix the parameters using the table above. Free.
429	`rate_limited`	Wait `Retry-After` seconds, then retry.
502	`upstream_error`	The source failed. Refunded; retry with backoff.

See Errors for the full list and retry guidance.

Status: stable (verified against the live source).