▣ FINANCE

Currency Converter API: Live & Historical Exchange Rates

Hosted on ApyHub

What it does

The Currency Converter API returns the exchange rate between two currencies, such as USD to EUR or USD to INR. Send a source and target currency code in a POST body and get back a JSON object whose data field holds the rate.

By default you get today's rate. Add an optional date in YYYY-MM-DD format to get the rate for a past day, which makes it a historical exchange rate API as well. To convert an amount, multiply it by the returned rate.

Developers use it to show local prices on pricing pages, convert totals at checkout, stamp invoices with the rate on the invoice date, and rebuild financial reports with the rates that applied at the time. Teams looking for a free currency converter API can start on the free tier.

Each request covers one currency pair. When you need several targets at once, the Multi-Currency Converter API returns them in one call.

Pairs well with: the Currencies Dictionary API to fill currency pickers with ISO 4217 codes and symbols, and the Global Pricing Recommendations API to set localized subscription prices before you convert them at checkout. AI agents can call it through ApyHub MCP.

POST

Convert currency pair for a date

https://api.eu.apyhub.com/apyhub/convert-currency-pair-for-date

QUICKSTART

GUIDE

Quickstart

Convert a currency pair for a date by sending the source and target currency codes.

curl -X POST "https://api.eu.apyhub.com/apyhub/convert-currency-pair-for-date" \
  -H "apy-token: $APY_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "source": "usd",
    "target": "eur"
  }'

What you'll get back

Returns a JSON object with a data field. The data value is either a number with the converted exchange rate or a boolean.

{
  "data": 0.9214
}

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API key

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About this endpoint

What it does

Converts a currency pair for a given date by taking a source currency, a target currency, and an optional date, then returning the conversion result in the response body.

Request Body

Parameter	Type	Description
date	String	Date in `YYYY-MM-DD` format. Defaults to today when omitted or blank.
source	String	Source currency code.
target	String	Target currency code.

Response

Returns a JSON object with a data field. The data value can be either a Number conversion result or a Boolean value, depending on the response variant declared in the schema. Success response schema: 200.

Parameter	Type	Description
data	Number / Boolean	Conversion result or boolean value, as declared by the response schema.

▣ COMMON ERRORS

Errors any endpoint can return

400bad_request

Required parameter missing or malformed body.

401unauthorized

API key missing, revoked, or not authorized for this service.

429rate_limited

Your plan's per-second rate exceeded. Retry with exponential backoff.

503upstream_busy

Backend temporarily unavailable. Try again in a few seconds.

Similar APIs

Closest matches in the catalog based on this service.

CALLMulti-Currency Converter APIApyHub CALLForeign Exchange Rates APIQuadlem, LLC CALLEUR Reference Exchange Rates – USD, GBP, JPY & INRLIQUILENS PRIVATE LIMITED CALLCurrencies Dictionary APIApyHub

From the blog

Reads that touch this API.

Currency Conversion and Exchange Rates Made Easy for DevelopersAug 5, 2026 Getting Started with APIs: A Beginner’s Guide 2026Sep 17, 2026 ApyHub Changelog – 01 Nov 2023: Latest API UpdatesJul 9, 2026 Build Inventory Management App in Retool with ApyHub Currency APIAug 7, 2026