Currencyinfo

Self-hosted crypto and fiat reference rates for wallets, payments and backend services

CoinPaprika
CoinLore
Binance
Currency API
ExchangeRate-API

CoinGecko
CoinMarketCap
ExchangeRate.host
MOEX
CryptoCompare

Currencyinfo cross-checks up to ten independent sources and serves a single rate you can trust.

Completely free, open-source and self-hosted. Five default sources work with no API keys at all.

Serves current rates and a history that accumulates in your own MongoDB.

GET http://127.0.0.1:36661/get?coin=adm,btc

{
  "success": true,
  "date": 1720721910858,
  "result": {
    "BTC/USD": 57840.874202345425,
    "ADM/USD": 0.029531587036,
    "BTC/CNY": 419808.6022324644,
    "ADM/CNY": 0.214340022454,
    "ADM/BTC": 5.10566e-7
  },
  "last_updated": 1720721902292,
  "version": "4.2.0"
}

Absolutely straightforward REST API

	Currencyinfo	Other services
Transparency	Open-source	Black box
Price	Free	Subscription
Installation	Self-hosted	Hosted by a third party
Sources	Combines up to ten independent sources	Relies on a single source
Feedback	Alerts via Slack, Discord and ADAMANT	Silent when something breaks
API	Simple: /get and /getHistory	Complex and poorly documented

1. Sources
Every enabled provider is polled on its own schedule.

2. Validation
Pairs are normalised; zero and non-finite cross rates are rejected.

3. Aggregation
Divergent quotes are detected, sources are weighted and merged, and minSources decides whether a pair is published.

4. History
Every snapshot is written to your own MongoDB and stays there.

5. REST API
/get returns current rates, /getHistory returns stored ones.

How a rate is produced

docker run -d \
  --name currencyinfo \
  -p 36661:36661 \
  -v "$(pwd)/config.jsonc:/usr/src/currencyinfo/config.jsonc:ro" \
  ghcr.io/adamant-im/currencyinfo:latest

One configuration file and one command. The default sources need no API key.

Documentation · Source code · Releases · Docker image

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