Add Humanitarian data exchange (#2268)

README.md

@@ -813,6 +813,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Dataflow Kit COVID-19](https://covid-19.dataflowkit.com) | COVID-19 live statistics into sites per hour | No | Yes | Unknown |
 | [Diabetes](http://predictbgl.com/api/) | Logging and retrieving diabetes information | No | No | Unknown |
 | [Healthcare.gov](https://www.healthcare.gov/developers/) | Educational content about the US Health Insurance Marketplace | No | Yes | Unknown |
+| [Humanitarian Data Exchange](https://data.humdata.org/) | Humanitarian Data Exchange (HDX) is open platform for sharing data across crises and organisations | No | Yes | Unknown |
 | [Infermedica](https://developer.infermedica.com/docs/) | NLP based symptom checker and patient triage API for health diagnosis from text | `apiKey` | Yes | Yes |
 | [Kawal Corona](https://kawalcorona.com/api/) | ID COVID data, include death, positive case and recover | No | Yes | Unknown |
 | [LAPIS](https://cov-spectrum.ethz.ch/public) | SARS-CoV-2 genomic sequences from public sources | No | Yes | Yes |