add notiliy API

[oluwabukolatina]

• [X] My submission is formatted according to the guidelines in the contributing guide
• [X] My addition is ordered alphabetically
• [X] My submission has a useful description
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• [X] The description does not end with punctuation
• [X] Each table column is padded with one space on either side
• [X] I have searched the repository for any relevant issues or pull requests
• [X] Any category I am creating has the minimum requirement of 3 items
• [X] All changes have been squashed into a single commit