DEV Community: chathuranga basnayaka

Does XE Have an API? (2026 Developer Guide)

chathuranga basnayaka — Tue, 14 Apr 2026 19:46:14 +0000

Yes — XE offers an enterprise-grade currency data API called XE Currency Data API. It's used by banks, Fortune 500 companies, and ERP systems (SAP, Oracle, Microsoft Dynamics) that need live FX rates in their workflows.

But the bigger question most developers have is: is the XE API affordable for my project?

This guide covers what the XE API provides, how much it costs, and when you should use it versus a cheaper alternative.

What the XE Currency Data API Provides

Live FX rates updated every 60 seconds
170+ currencies plus metals and select cryptocurrencies
Historical rates going back 10+ years
Monthly averages and volatility data
Integrations with SAP, Oracle, Microsoft Dynamics
SDKs for Java, Node.js, PHP, Python
99.95% SLA

Rates are aggregated from 100+ sources including central banks and Tier 1 commercial banks. XE has been in the FX data business since 1993, which is part of what enterprise buyers pay for.

XE API Pricing in 2026

XE is priced for enterprises, not indie developers. Plans are annual:

Plan	Annual Cost	Requests/month	Update Frequency
Lite	~$799/year	10,000	Daily
Intermediate	~$1,799/year	50,000	Hourly + daily
Prime	~$4,499/year	150,000	15-min + hourly + daily
Enterprise	Custom	Custom	60-second live rates

Real-time (60-second) rates are Enterprise-only. There is no free tier — only a free trial.

For context: a small fintech startup on the Prime plan is paying $375/month, and they still don't get 60-second updates.

Why Companies Pay for XE

Brand trust — XE is the name non-technical stakeholders recognize. For regulated industries, that matters during audits.
ERP integrations — if your finance team runs SAP or Oracle, XE's prebuilt connectors save engineering time.
Compliance-grade data — documented sourcing and methodology for audit trails.
Support — dedicated account managers on higher tiers.

If you're a bank, insurer, or large corporate with an existing XE relationship, the price is a rounding error and the integration is frictionless.

Why Most Developers Don't Use XE

No free tier — only a time-limited trial.
Annual billing — no pay-as-you-go.
60-second updates are Enterprise-only — cheaper plans top out at 15-minute updates.
API complexity — optimized for ERP integrations, not a simple REST consumer.
Cost — $800/year minimum is prohibitive for side projects, startups, and most SaaS products.

XE API Alternatives for Developers

If you don't need the XE brand on an invoice, several alternatives offer the same technical value at a fraction of the price:

Provider	60s Updates	Free Tier	Starting Price
AllRatesToday	Yes (paid tiers)	300 req/mo, historical included	Low monthly tiers
XE	Enterprise only	Trial only	~$67/month (annual)
CurrencyLayer	Professional+ only	100 req/mo, USD only	$13.99/mo
Fixer.io	Professional+ only	100 req/mo, EUR only	$13.99/mo

AllRatesToday sources from Reuters/Refinitiv (the same feed XE uses) and offers 60-second updates on low-cost monthly plans. For most developers, it's the practical alternative.

When XE Is the Right Choice

You're an enterprise with an annual budget and procurement process.
You need SAP/Oracle/MS Dynamics connectors out of the box.
Your compliance team specifically requires XE's documentation.
You already have an XE relationship for the consumer products.

When to Skip XE

You're a startup, indie dev, or small SaaS team.
You need to pay monthly or per-request.
You want a free tier for prototyping.
You need CORS for browser-side calls (XE doesn't support it).
You want 60-second updates without enterprise pricing.

How to Sign Up for the XE API

Visit https://www.xe.com/platform/xecurrencydata/
Request a trial — XE sales will contact you to discuss use case.
Negotiate annual pricing based on volume and required update frequency.

Note: XE does not publish pricing on the website. The numbers in this article are based on published third-party reports and historical customer disclosures. Actual pricing varies.

FAQ

Is the XE API free?

No. XE offers a free trial, but there is no permanent free tier.

How accurate is the XE API?

Very accurate. XE aggregates from 100+ sources including central banks and Tier 1 commercial banks. For most currency pairs, XE rates match other top-tier providers (AllRatesToday, Bloomberg, Reuters) within 0.01%.

Can I use XE rates commercially?

Yes, on paid plans. The free trial is typically for evaluation only — check the trial terms before using the rates in a commercial product.

What's the difference between XE.com and the XE API?

XE.com is the consumer website for currency conversion and money transfers. The XE Currency Data API is the commercial B2B product for developers and enterprises. Different pricing, different terms.

Does XE have CORS support?

No. XE API calls must be made server-side.

Need XE-grade data without the enterprise price tag? AllRatesToday uses the same Reuters/Refinitiv feed, offers a free tier with historical data, and supports CORS out of the box.

What Is a Currency API? (Developer's Guide, 2026)

chathuranga basnayaka — Tue, 14 Apr 2026 19:45:21 +0000

A currency API is a web service that returns exchange rate data to your application over HTTPS, in a machine-readable format (usually JSON). Instead of scraping a website or maintaining your own pipeline of bank feeds, you make a REST request — GET /rates?source=USD&target=EUR — and get back the current rate.

This guide explains what a currency API does, how it works, common endpoints, real-world use cases, and how to pick the right one.

What a Currency API Does

A currency API sits between your application and the global FX market. It handles:

Data aggregation — pulling rates from interbank feeds, central banks, and aggregators.
Normalization — converting varied source formats into a consistent JSON response.
Hosting — serving rates from infrastructure designed for high availability and low latency.
Access control — issuing API keys, enforcing rate limits, tracking usage.

You call the API, you get a number. The provider handles everything else.

How a Currency API Works

A typical request-response cycle:

Your app builds an HTTPS request with:
- A source currency (e.g. USD)
- One or more target currencies (e.g. EUR, GBP)
- An API key (usually in an Authorization: Bearer ... header)
The provider's server:
- Authenticates the key
- Looks up the latest rates from its cache or live feed
- Returns a JSON response with the rate and a timestamp
Your app:
- Parses the JSON
- Multiplies the amount by the rate
- Displays or stores the result

Example request:

curl -X GET "https://allratestoday.com/api/v1/rates?source=USD&target=EUR" \
  -H "Authorization: Bearer YOUR_API_KEY"

Example response:

{
  "source": "USD",
  "target": "EUR",
  "rate": 0.9234,
  "time": "2026-04-14T12:00:00Z"
}

Common Currency API Endpoints

A mature currency API provides several endpoint types, each for a specific job:

Latest Rates

Returns the most recent exchange rates. The bread-and-butter endpoint.

GET /api/v1/rates?source=USD

Historical Rates

Returns the rate on a specific past date. Critical for accounting, tax reporting, and backtesting.

GET /api/historical-rates?source=USD&target=EUR&date=2024-03-15

Time Series

Returns a range of daily rates between two dates. Used for trend charts and analysis.

GET /api/time-series?source=USD&target=EUR&from=2026-01-01&to=2026-03-31

Convert

Does the multiplication for you — give it an amount and it returns the converted amount.

GET /api/convert?source=USD&target=EUR&amount=100

Fluctuation

Returns the change, percentage change, and high/low over a period. Useful for rate alerts.

GET /api/fluctuation?source=USD&target=EUR&from=2026-04-01&to=2026-04-14

Where Currency APIs Get Their Data

Not all currency APIs are built on the same data. Understanding the source matters because it determines accuracy and update frequency.

Interbank feeds (Reuters/Refinitiv, Bloomberg) — live rates from the actual FX market. Highest accuracy and freshness. Used by AllRatesToday, XE, and institutional providers.
Central banks (European Central Bank, Federal Reserve) — one reference rate published per day. Free to use, but daily and limited to ~30 currencies. Used by Fixer and ExchangeRate-API free tiers.
Aggregators — blends of multiple sources, with a provider-specific methodology.
Crypto exchanges — order-book data from Binance, Coinbase, etc. Used for crypto pairs.

An API serving daily ECB data is not "wrong," but it cannot deliver real-time rates no matter how fast its servers are.

Common Use Cases

E-Commerce

Display prices in the visitor's local currency. Most carts check the rate at cart load and at checkout to avoid surprises.

SaaS Billing

Invoice customers in their own currency while reporting revenue in USD or EUR. Usually calls the API once per invoice generation, not per page load.

Financial Reporting

Convert foreign transactions to a reporting currency at historical rates. Historical endpoint + accounting software.

Trading and Dashboards

Live or near-live rates for charts, screeners, and portfolio trackers. Requires 60-second updates or faster.

Cross-Border Payouts

Marketplaces and payroll systems calculating settlement amounts. Usually combines a currency API with a payment processor.

Travel and Fintech Apps

Consumer-facing converters for travelers, remittance apps, and neobanks.

What Makes a Good Currency API

Accurate data source — interbank feeds beat daily ECB snapshots.
Update frequency — real-time (60s) for anything touching money; hourly or daily is fine for reporting.
Coverage — at least 150+ fiat currencies, plus metals and crypto if relevant.
Flat JSON responses — easy to parse, no nested quotes-object weirdness.
Official SDKs — save you writing HTTP plumbing.
HTTPS and CORS — table stakes in 2026.
Transparent pricing — a real free tier, no hidden fees.
Good documentation — working code samples in your language.

Currency API Pricing

Free tiers exist, usually with trade-offs (daily updates, low quotas, restricted base currency). Paid plans run from $10–$100/month for most SaaS needs. Enterprise plans (XE, OANDA) run into thousands per year.

For most developers, a free tier is enough to prototype, and a $10–$20/month plan covers production.

Choosing a Currency API

Match the API to the job:

Indie project / prototype — AllRatesToday free tier, Frankfurter (no key).
Production e-commerce / SaaS — AllRatesToday, Open Exchange Rates, ExchangeRate-API paid plans.
Trading / fintech — AllRatesToday (60s) or XE Enterprise.
Enterprise / regulated — XE, OANDA, Bloomberg.

FAQ

Is there a free currency API?

Yes. AllRatesToday, ExchangeRate-API, Open Exchange Rates, and Fixer all offer free tiers. Frankfurter is completely free with no key required.

What's the difference between a currency API and an exchange rate API?

Nothing — they're the same thing. "Currency API," "exchange rate API," "FX API," and "forex API" are used interchangeably.

Do currency APIs support crypto?

Some do (CurrencyFreaks, CurrencyAPI, XE for select coins). Most are fiat-focused. For crypto-heavy work, use a dedicated crypto API like CoinGecko.

How often do rates update?

Depends on the provider and plan. Daily (ECB snapshots) at the low end, 60 seconds on real-time plans, microseconds on institutional feeds.

Can I use a currency API in the browser?

Only if it supports CORS. AllRatesToday and ExchangeRate-API do. Fixer, CurrencyLayer, and XE don't — those require a server-side proxy.

Do I need a paid plan?

For prototypes and low-volume apps, a free tier is fine. For production with live pricing, you'll want a paid plan with at least hourly updates.

Ready to integrate? Get a free AllRatesToday API key — 300 requests/month, real-time rates, historical data, and official SDKs for JavaScript, Python, and PHP.