API design concerns for public availability (just to name a few):

  - security
  - preventing abuse
  - API Anti-Corruption Layer
    - sanitizing inputs and outputs
    - i.e. not exposing DB IDs/PKs, or pagination cursors directly
  - versioning, backward- and forward- compatibility, deprecation strategy
  - usability, DX, Documentation
  - reducing bandwidth use:
    - caching
    - eliminate over-fetching
    - efficient wire format