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 ## Payment and Billing Integration
 
   * [Adapty.io](https://adapty.io/) - One-stop solution with open-source SDK for mobile in-app subscription integration to iOS, Android, React Native, Flutter, Unity, or web app. Free up to $10k monthly revenue.
+  * [AllRatesToday](https://allratestoday.com) - Real-time mid-market exchange rates for 150+ currencies with official JavaScript, Python, and PHP SDKs. Free tier includes 300 requests/month over HTTPS.
   * [Churnkey](https://churnkey.co) - Cancel flows (open-sourced), churn metrics, and revenue analytics for subscription businesses. Free forever. 
   * [CoinMarketCap](https://coinmarketcap.com/api/) - Provides cryptocurrency market data including the latest crypto and fiat currency exchange rates. The free tier offers 10K call credits/month.
   * [Currencyapi](https://currencyapi.com) - Free currency conversion and exchange rate data API. Free 300 requests per month, 10 requests per minute for private use.
@@ -1515,6 +1516,7 @@ Update Time, five active automations, webhooks.
   * [CurrencyFreaks](https://currencyfreaks.com/) - Provides current and historical currency exchange rates. Free DEVELOPER plan available with 1000 requests/month.
   * [currencylayer](https://currencylayer.com/) - Reliable Exchange Rates and Currency Conversion for your Business, 100 API requests/month free.
   * [exchangerate-api.com](https://www.exchangerate-api.com) - An easy-to-use currency conversion JSON API. The free tier updates once per day with a limit of 1,500 requests/month.
+  * [Exchange Rate API](https://exchange-rateapi.com) - Real-time currency rates for 160+ currencies with 60-second updates and official SDKs. Free tier includes 300 requests/month.
   * [FraudLabsPRO](https://www.fraudlabspro.com) - Help merchants to prevent payment fraud and chargebacks. Free Micro Plan available with 500 queries/month.
   * [FxRatesAPI](https://fxratesapi.com) - Provides real-time and historical exchange rates. The free tier requires attribution.
   * [Moesif API Monetization](https://www.moesif.com/) - Generate revenue from APIs via usage-based billing. Connect to Stripe, Chargebee, etc. The free tier offers 30,000 events/month.