Add icy.tools to Cryptocurrency (#3062)

resolve #3062

README.md

@@ -440,6 +440,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Gateio](https://www.gate.io/api2) | API provides spot, margin and futures trading operations | `apiKey` | Yes | Unknown |
 | [Gemini](https://docs.gemini.com/rest-api/) | Cryptocurrencies Exchange | No | Yes | Unknown |
 | [Huobi](https://huobiapi.github.io/docs/spot/v1/en/) | Seychelles based cryptocurrency exchange | `apiKey` | Yes | Unknown |
+| [icy.tools](https://developers.icy.tools/) | GraphQL based NFT API | `apiKey` | Yes | Unknown |
 | [Indodax](https://github.com/btcid/indodax-official-api-docs) | Trade your Bitcoin and other assets with rupiah | `apiKey` | Yes | Unknown |
 | [INFURA Ethereum](https://infura.io/product/ethereum) | Interaction with the Ethereum mainnet and several testnets | `apiKey` | Yes | Yes |
 | [Kraken](https://docs.kraken.com/rest/) | Cryptocurrencies Exchange | `apiKey` | Yes | Unknown |