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 | [Kontra - OWASP Top 10 for API](https://application.security/free/owasp-top-10-API) | Is a series of free interactive application security training modules that teach developers how to identify and mitigate security vulnerabilities in their web API endpoints. |
 | [Pentesting Lab: vAPI](https://github.com/roottusk/vapi) | vAPI is Vulnerable Adversely Programmed Interface, Self-Hostable PHP Interface that mimics OWASP API Top 10 scenarios in the means of Exercises. |
 | [ShipFast - Practical API Security Walkthrough](https://github.com/approov/shipfast-api-protection) | Learn practical Mobile and API security techniques: API Key, Static and Dynamic HMAC, Dynamic Certificate Pinning, and Mobile App Attestation. |
+| [Hacker101 CTFs - GraphQL challenges](https://www.hackerone.com/ethical-hacker/graphql-week-hacker101-capture-flag-challenges) | GraphQL Week on The Hacker101 Capture the Flag Challenges |
 
 ## Enumeration / Scanning
 | Name | Description |