Currencylayer
Fixer.io
Open Exchange Rates
ExchangeRate-API
Currencyapi.com
Exchangeratesapi.io
Freecurrencyapi.com
BestExchangeRates
FXProof
Open Exchange Rates
Fixer.io
ExchangeRate-API
Exchangeratesapi.io
FXPing.co
Currencylayer provides a simple REST API with real-time and historical exchange rates for 168 world currencies, delivering currency pairs in universally usable JSON format - compatible with any of your applications.
Spot exchange rate data is retrieved from several major forex data providers in real-time, validated, processed and delivered hourly, every 10 minutes, or even within the 60-second market window.
Providing the most representative forex market value available ("midpoint" value) for every API request, the currencylayer API powers currency converters, mobile applications, financial software components and back-office systems all around the world.
FXProof is a B2B SaaS for creating signed, verifiable proof documents from official exchange-rate data.
For each supported dataset and date, FXProof keeps the official source, rate context, document ID, payload hash, digital signature, and public verification path together in a reusable proof bundle. The resulting PDF can be stored with an invoice, expense, accounting entry, tax file, audit workpaper, or internal-control record, so the exchange rate can be reviewed later without rebuilding the evidence trail.
Supported official sources currently include the European Central Bank, HMRC, the Federal Reserve System, the Bank of Canada, and the National Bank of Kazakhstan.
Key capabilities include:
Users can inspect public proof samples, verify supported documents without an account, retrieve ready proof bundles through the web application, and automate supported workflows through the API.
FXProof does not provide currency exchange, payment, money-transfer, trading, investment, legal, tax, or accounting services. Official institutions remain the sources of the underlying reference rates; FXProof provides the proof document and evidence workflow around those data.
Currencylayer
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FXProof's answer:
FXProof is intended for:
The common requirement is a repeatable way to document and later verify the official exchange rate used in an invoice, expense, accounting entry, tax file, audit workpaper, or internal review.
FXProof's answer:
FXProof was created to solve a practical evidence problem. Official exchange rates are usually available, but businesses often have to collect the supporting evidence manually by saving webpages, copying values into spreadsheets, taking screenshots, or rebuilding the source trail months later.
These methods are difficult to reproduce and can leave a weak audit trail. FXProof was designed to connect the official source, date, exchange-rate context, signed PDF, document ID, payload hash, and verification process in one consistent workflow. The goal is to make an exchange-rate record easier to store, explain, share, and verify when it is reviewed later.
FXProof's answer:
FXProof does not simply provide an exchange rate. It creates a signed, verifiable proof document that preserves the official source, dataset, date, document ID, payload hash, signature status, and verification details in one reusable evidence bundle. A recipient can later verify the proof through a public verification page. This makes FXProof suitable for accounting, tax, audit, compliance, internal-control, and dispute-review records where the rate must remain explainable and verifiable over time.
FXProof's answer:
Most exchange-rate services focus on displaying rates, converting currencies, or providing raw API data. FXProof is designed for situations where a business must document which official rate was used and provide evidence that can be reviewed later.
Users receive a signed proof PDF, source attribution, verification metadata, and a public verification path. Previously accessed proof bundles can be reused and downloaded again, while the API allows the same evidence workflow to be automated. FXProof is therefore a better fit when the required result is not merely a rate, but a verifiable business record.
FXProof's answer:
FXProof does not currently publish customer names. As a recently launched service, it will only identify customers publicly after receiving their permission.
Based on our record, Currencylayer seems to be more popular. It has been mentiond 3 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
CurrencyLayer: Provides free and premium plans with real-time and historical exchange rates. - Source: dev.to / over 1 year ago
Accurate and up-to-date exchange rate information is crucial for businesses, developers, and financial institutions alike. Whether you're building a financial application, running an e-commerce platform, or managing international investments, having access to reliable exchange rate data is essential. Fortunately, there are several free exchange rate APIs available, each offering a range of features and... - Source: dev.to / over 2 years ago
Currencylayer — Reliable Exchange Rates and Currency Conversion for your Business, 1,000 API requests/month free. - Source: dev.to / over 2 years ago
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Open Exchange Rates - Free, hourly-updated exchange rates - a simple, accurate, open-source JSON API. Free for personal use, a bargain for everybody else.
ExchangeRate-API - An easy to use, free & reliable Exchange Rate API trusted by tens of thousands of developers since 2010!
Currencyapi.com - Currencyapi.com is a free, reliable & feature complete currency exchange rates API. 170+ world currencies & 60 second update rate.
Exchangeratesapi.io - Simple API for Global Currency Exchange Rates
FXPing.co - Live exchange rates for 150+ currencies with a built-in FX margin calculator. Convert instantly and export to CSV, JSON or PDF.