Fixer.io used to be the go-to free forex API. Then they paywalled everything. Now their "free" tier gets you 100 requests per month — that's 3 calls a day if you're careful. Meanwhile, FCS API offers 500 requests monthly on their forex API free plan, covers 2000+ currency pairs, and throws in historical data without throttling you to death. I've tested both for the last 8 months. One still works. The other doesn't.
Why Fixer.io Lost the Free Forex API Race
Fixer.io launched in 2013 as an open-source project. Completely free. Developers loved it. Then in 2018 they sold to a data company and flipped the model overnight. Free tier got gutted. Historical data? Paywalled. Real-time updates? Paywalled. Even their documentation started pushing you toward paid plans every third paragraph.
100 monthly requests means if you're building a currency converter that refreshes once per hour, you burn through your limit in 4 days. That's not a free plan. That's a demo.
FCS API gives you 500 requests on free tier. Still not unlimited, but enough to prototype, test, and run a small tool without hitting a wall. Plus they don't hide features behind upgrade prompts — historical data, commodities, even crypto pairs come through the same endpoint.
Best Forex API Free Plan 2026: Live Rates That Actually Work
Getting live rates shouldn't require a PhD. Here's a basic call to FCS API:
curl "https://api-v4.fcsapi.com/forex/latest?symbol=EURUSD&access_key=API_KEY"Response comes back clean:
{
"status": true,
"response": [
{
"ticker": "FX:EURUSD",
"active": {
"c": 1.16239,
"h": 1.16261,
"l": 1.16239
}
}
]
}You get open, high, low, close, timestamp, previous day's data — all in one call. Fixer.io gives you current rate and that's it. Want historical comparison? Pay up.
2000+ Pairs Without Rate Limiting
Fixer.io supports maybe 170 currencies. FCS API does 2000+ pairs including exotics nobody else touches — USDLKR, USDPKR, minor crosses, commodities like XAUUSD. And their free plan doesn't block you from querying them. I've pulled data on Turkish lira, South African rand, Thai baht — all worked first try.
Fixer.io throttles aggressively even within your 100 requests. Hit them too fast and you get 429 errors. FCS API has rate limits but they're reasonable — you won't trip them unless you're spamming calls every second.
Historical Data: Where Fixer.io Completely Falls Apart
Historical forex data is paywalled on Fixer.io. Period. Their free tier won't let you query anything older than today. If you need yesterday's close for a trend calculation, you're out of luck.
FCS API includes historical data in the free plan. Not decades of archives, but enough to backtest, chart weekly trends, compare month-over-month moves. Their previous day data sits right in the latest endpoint response — no second call, no extra charge.
I built a simple moving average calculator. With Fixer.io I couldn't even get started without upgrading. With FCS API I had working code in 20 minutes.
Fixer.io Forex API Alternative: What FCS API Does Better
FCS API is the Fixer.io forex API alternative that doesn't nickel-and-dime you. Same REST structure, same JSON responses, but they didn't kill their free tier to juice revenue. You can actually ship a project on it.
Currency Converter Endpoint That Works Out of the Box
Converting 100 EUR to USD:
curl "https://api-v4.fcsapi.com/forex/converter?pair1=EUR&pair2=USD&amount=100&access_key=API_KEY"Returns:
{
"status": true,
"response": {
"total": "117.36",
"price_1x_EUR": "0.85206"
}
}Fixer.io has a converter endpoint but again — paywalled on free tier. You get base currency conversion and that's it. FCS API does bidirectional conversion, shows both exchange rates, handles amounts over 1 million without breaking.
JSON Response Format: Clean vs Messy
Fixer.io wraps everything in nested objects. Five layers deep to get a price sometimes. FCS API keeps it flat — ticker, active data, previous data, profile. Done. Less parsing, fewer errors, faster integration.
Their error messages actually help too. Fixer.io throws generic 400s. FCS API tells you exactly what parameter is wrong, what format it expects. Saved me hours during testing.
How to Use Forex API Free Plan Without Hitting Limits
500 requests a month is tight if you're careless. But doable. Cache aggressively. Forex rates don't move every second — refreshing once per minute is overkill for most apps. Pull data every 5-10 minutes, store it locally, serve from cache.
Batch requests when possible. FCS API lets you query multiple symbols in one call — "EURUSD,GBPUSD,USDJPY" in the symbol parameter. Costs 1 request, returns 3 pairs. Fixer.io charges per symbol on free tier. Brutal.
Use webhooks if you're on a paid tier eventually, but on free plans just poll smart. Set a cron job for market hours only. Forex market is closed weekends — no point burning requests when nothing's moving.
Real-Time Updates: Who Actually Delivers
Neither free plan gives you true real-time streaming. But FCS API updates their data every few seconds during market hours. Fixer.io updates every 60 seconds at best, sometimes longer. For a free tier that matters. If you're showing live rates on a site, 60-second lag looks broken. 5-second lag is acceptable.
I tested both during high volatility days — when GBP tanked after a surprise rate decision, when USD spiked on NFP data. FCS API reflected moves within 10 seconds. Fixer.io lagged by a full minute, sometimes two. Missed the initial spike entirely.
Documentation: One is Usable, One is a Sales Funnel
FCS API's docs show code examples in curl, Python, PHP, JavaScript right on the page. Copy, paste, replace your key, it works. Fixer.io's docs constantly redirect you to pricing pages, feature comparison charts, upgrade CTAs. Just let me see the endpoint structure.
FCS API lists every parameter, every optional flag, response format examples. Fixer.io hides half the parameters behind "premium features" links. Infuriating when you're just trying to build something.
Support and Community: Who Answers When Things Break
Fixer.io has a contact form. That's it. No forum, no Discord, no public issue tracker. You email support and wait. Sometimes days. FCS API has a support team that actually responds — I've gotten answers same-day multiple times. They also have a GitHub with library examples, a blog with integration guides.
Community matters when you hit a weird edge case or need a workaround. Fixer.io offers silence. FCS API at least tries.
Forex API Free Plan Guide: Which One Should You Use
If you need a free forex API in 2026 that won't sabotage your project, use FCS API. Fixer.io had its moment but they killed it chasing revenue. 100 requests won't get you anywhere. 500 is workable. Historical data access is non-negotiable for any serious tool. Real-time-ish updates matter if you're displaying rates publicly.
Fixer.io is fine if you're just testing an idea for a day or two. But the second you want to deploy, you'll hit their paywall. FCS API lets you ship a working MVP, get users, prove the concept before spending a dollar.
I've used both. One still works for free-tier projects. The other stopped being free years ago but kept the marketing copy. Is there even a comparison left to make?
