Coinlayer

Overview

Coinlayer (an APILayer product) provides real-time and historical cryptocurrency exchange rates for 380+ coins against 168 fiat and crypto currencies, with a simple key-based REST API. A straightforward pick for price widgets and portfolio tools.

Quick Start

Live rates for a coin (replace YOUR_KEY):

curl "https://api.coinlayer.com/live?access_key=YOUR_KEY&symbols=BTC"

Historical rates:

curl "https://api.coinlayer.com/2024-01-15?access_key=YOUR_KEY&symbols=BTC,ETH"

Fiat/crypto conversion:

curl "https://api.coinlayer.com/convert?access_key=YOUR_KEY&from=BTC&to=USD&amount=1"

List of supported symbols:

curl "https://api.coinlayer.com/list?access_key=YOUR_KEY"

Authentication

• Register at coinlayer.com for a free key (emailed).
• Send it as the access_key query parameter.

Rate Limits & Notes

• Free tier: 100 requests/month — small; paid tiers scale up.
• Free tier updates rates hourly (paid tiers update more frequently).
• symbols filters the response to the coins you need (keeps payloads small).
• The free tier includes live rates for a limited symbol set; historical data is on paid tiers.

FAQ

Is Coinlayer free? Free tier: 100 requests/month; more is paid.

How do I get a key? Sign up at coinlayer.com — the access key is emailed.

Can I get historical rates for free? No — historical data is on paid tiers.