diff --git a/README.md b/README.md
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+++ b/README.md
@@ -828,6 +828,7 @@ API | Description | Auth | HTTPS | CORS |
 | [BriefTape](https://brieftape.com) | Real-time AI-summarized SEC filings, Fed, FDA and BLS data, ticker-tagged | `apiKey` | Yes | Yes |
 | [Citi](https://sandbox.developerhub.citi.com/api-catalog-list) | All Citigroup account and statement data APIs | `apiKey` | Yes | Unknown | |
 | [CongressInvests](https://congressinvests.com) | Real-time U.S. congressional stock trade disclosures from Senate EFD and House Clerk | `apiKey` | Yes | Yes | |
+| [Dino.markets](https://dino.markets/docs) | Matched Kalshi and Polymarket prediction-market data, cross-venue spreads | `apiKey` | Yes | No | |
 | [Econdb](https://www.econdb.com/api/) | Global macroeconomic data | No | Yes | Yes | |
 | [EconPulse](https://econpulse.io) | Live economic data — CPI, PPI, energy, treasury rates, BTC premium | `apiKey` | Yes | Yes |
 | [Edgrapi](https://edgrapi.com) | Clean SEC EDGAR company financials, ratios, filings and 10-K/10-Q sections as normalized JSON | `apiKey` | Yes | Unknown | |