1. Project overview
2. Contribute
3. Code of conduct
4. Conventions
6. Specifications
7. 1. Headers
8. 2. Pagination
9. 3. Error codes
10. 4. Subscriptions
11. 1. 4.1. Add a subscription
    2. 4.2. List subscriptions
    3. 4.3. Get a subscription
    4. 4.4. Delete a subscription
12. 5. Operations
13. 1. 5.1. Add subscriptions in bulk