From b5349f2e8295ad4d04176421c2a0b8cebb257694 Mon Sep 17 00:00:00 2001 From: chetanmane Date: Fri, 4 Sep 2026 18:00:24 +0000 Subject: [PATCH] Add US Mortgage Calculator to Finance Free mortgage calculation API: no authentication, no key, no rate limit and no signup. HTTPS and CORS confirmed against the live endpoint from a third-party origin. Endpoints cover monthly payment and amortization, affordability, refinance break-even, closing costs, PMI and MIP, and property tax reference data for all fifty states. The state data is also published under CC BY 4.0. Checked before opening: no mortgage or amortization API is currently listed, the entry is alphabetical between Twelve Data and VAT Validation, and the description is 76 characters. Co-Authored-By: Claude Opus 5 Claude-Session: https://claude.ai/code/session_011WY6ZEBhp1yhG6ktdHHEv3 --- README.md | 1 + 1 file changed, 1 insertion(+) 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 | |