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Currencyinfo

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

  • ExchangeRate
  • MOEX
  • Currency API
Currencyinfo
  • CoinMarketCap
  • CoinGecko
Currencyinfo cross-checks up to nine 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

CurrencyinfoOther services
Transparency
Open-source
Black box
Price
Free
Subscription
Installation
Self-hosted
Hosted by a third party
Sources
Combines up to nine 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

Rate sources

Five sources are enabled out of the box and need no API key. The rest are optional and off by default.

SourceAssetsDefaultAPI keyNotes
CoinPaprikaCryptoEnabledNot requiredRequest quotas apply on the free plan
CoinLoreCryptoEnabledNot requiredBroad coin coverage
BinanceCryptoEnabledNot requiredRegional restrictions apply
ExchangeRate-APIFiatEnabledNot requiredUSD is the base currency
Currency APIFiat and cryptoEnabledNot requiredCommunity-maintained dataset
CoinGeckoCryptoDisabledFree Demo keyKeyless access ended in 2026
CoinMarketCapCryptoDisabledRequiredPaid plans lift the rate limits
ExchangeRate.hostFiat and metalsDisabledRequiredAdds precious metals
MOEXFiat (RUB)DisabledNot requiredMoscow Exchange reference rates
CryptoCompareCryptoDisabledSubscriptionDeprecated: the free tier was retired on 21 May 2026

No single source covers every asset. Currencyinfo keeps serving rates when a provider fails, throttles or disappears.

How a rate is produced

  1. Sources — every enabled provider is polled on its own schedule.
  2. Validation — pairs are normalised, and zero or 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 at all.
  4. History — every snapshot is written to your own MongoDB and stays there.
  5. REST API — /get returns current rates, /getHistory returns stored ones.

Get started

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

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

Documentation Source code Releases Docker image

Currencyinfo runs in production in the ADAMANT ecosystem. History starts accumulating on your own server once you deploy.

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Currencyinfo source code on GitHub
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