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Crypto API

Crypto price API: 500+ cryptocurrencies, refreshed every second

A crypto currency exchange API: real-time prices for 500+ crypto making up 750+ pairs, aggregated from the world's biggest exchanges. Every-second updates on every plan — no premium tier required.

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GET /crypto/fetch-prices · 200 OK · 15ms
$ curl -H "X-API-Key: YOUR_KEY" \
  "api.fastforex.io/crypto/fetch-prices?pairs=BTC/USD,ETH/BTC"

{
  "prices": {
    "BTC/USD": 67412.50,
    "ETH/BTC": 0.052245
  },
  "updated": "2026-07-20T09:39:04Z",
  "ms": 15
}

Crypto without the exchange plumbing.

500+

Cryptocurrencies across 750+ pairs

1s

Updates on every plan — no exceptions

$18

Per month, crypto included

  • Every second, every plan

    Crypto prices refresh every second whether you're on One, Extra or Premium — batched up to 10 pairs per request. Speed isn't an upsell here.

    Endpoint docs: Every second, every plan

  • Cryptocurrency conversion API: any pair, any direction

    Fiat-to-crypto, crypto-to-fiat, and crypto-cross pairs like ETH/BTC — plus /convert bridges any combination even without a direct trading pair.

    Endpoint docs: Cryptocurrency conversion API: any pair, any direction

  • Exchange-aggregated

    A crypto exchange rate API fed by the biggest and best exchanges worldwide for reliable, robust real-time data.

  • Stablecoins included

    Full stablecoin coverage alongside majors and alts — see the complete list in the customer console.

Build with confidence:

OpenAPI spec (opens in a new tab)Endpoint reference (opens in a new tab)Browse all 513 assetsWhere the data comes from

Separate live, dev & test API keys — create, label & manage multiple API keys in the Console

Full-speed crypto on every plan, from $18/month.

There's no crypto tier to buy. Every plan gets 500+ coins at 1-second freshness, inside the same 1,000,000-call allowance.

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Crypto API — FAQ.

The details developers ask about before integrating.

Which coins are supported?
500+ cryptocurrencies making up 750+ pairs, including major stablecoins. The full list lives in the customer console and the /crypto/currencies endpoint.
Can I convert crypto to any fiat?
Yes — the conversion API bridges any fiat/crypto combination, even without a direct market pair.
How do I get the Bitcoin price?
Call /crypto/fetch-prices with pairs=BTC/USD — a BTC price API request that returns the latest price, refreshed every second. ETH, USDT and the rest of the 500+ coins work the same way.
Do crypto calls cost extra?
No — they draw from the same 1,000,000 monthly calls as everything else.

Still have questions?

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