Add VulDB (#2485)

README.md

@@ -1211,6 +1211,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Spyse](https://spyse-dev.readme.io/reference/quick-start) | Access data on all Internet assets and build powerful attack surface management applications | `apiKey` | Yes | Unknown |
 | [UK Police](https://data.police.uk/docs/) | UK Police data | No | Yes | Unknown |
 | [Virushee](https://api.virushee.com/) | Virushee file/data scanning | No | Yes | Yes |
+| [VulDB](https://vuldb.com/?doc.api) | VulDB API allows to initiate queries for one or more items along with transactional bots | `apiKey` | Yes | Unknown |
 
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