diff --git a/README.md b/README.md
index ade44e71..7a4a04f6 100644
--- a/README.md
+++ b/README.md
@@ -930,6 +930,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Top 5 Stocks](https://top5stocks.netlify.app/developers) | Daily AI-ranked stock and crypto watchlists | No | Yes | Unknown | |
 | [Tradier](https://developer.tradier.com) | US equity/option market data (delayed, intraday, historical) | `OAuth` | Yes | Yes | |
 | [Twelve Data](https://twelvedata.com/) | Stock market data (real-time & historical) | `apiKey` | Yes | Unknown | |
+| [US Mortgage Calculator](https://www.usmortgagecalc.com/developers/api) | Mortgage payment, amortization, affordability and 50-state property tax data | No | Yes | Yes | |
 | [VAT Validation](https://www.abstractapi.com/vat-validation-rates-api) | Validate VAT numbers and calculate VAT rates | `apiKey` | Yes | Yes | |
 | [WallstreetBets](https://dashboard.nbshare.io/apps/reddit/api/) | WallstreetBets Stock Comments Sentiment Analysis | No | Yes | Unknown | |
 | [Yahoo Finance](https://www.yahoofinanceapi.com/) | Real time low latency Yahoo Finance API for stock market, crypto currencies, and currency exchange | `apiKey` | Yes | Yes | |