To cite package ‘httpgd’ in publications use:

  Rupprecht F (2026). _httpgd: A 'HTTP' Server Graphics Device_. R
  package version 2.1.4, <https://github.com/nx10/httpgd>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {httpgd: A 'HTTP' Server Graphics Device},
    author = {Florian Rupprecht},
    year = {2026},
    note = {R package version 2.1.4},
    url = {https://github.com/nx10/httpgd},
  }