Add The Graph API

README.md

@@ -312,6 +312,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Nomics](https://nomics.com/docs/) | Historical and realtime cryptocurrency prices and market data | `apiKey` | Yes | Yes |
 | [Poloniex](https://poloniex.com/support/api/) | US based digital asset exchange | `apiKey` | Yes | Unknown |
 | [Technical Analysis](https://technical-analysis-api.com) | Cryptocurrency prices and technical analysis | `apiKey` | Yes | No |
+| [The Graph](https://thegraph.com) | Indexing protocol for querying networks like Ethereum with GraphQL | No | Yes | Unknown |
 | [VALR](https://docs.valr.com/) | Cryptocurrency Exchange based in South Africa | `apiKey` | Yes | Unknown |
 | [WallstreetBets](https://dashboard.nbshare.io/apps/reddit/api/) | WallstreetBets Stock Comments Sentiment Analysis | No | Yes | Unknown |
 | [WorldCoinIndex](https://www.worldcoinindex.com/apiservice) | Cryptocurrencies Prices | `apiKey` | Yes | Unknown |