To cite package ‘httr’ in publications use:

  Wickham H (2026). _httr: Tools for Working with URLs and HTTP_. R
  package version 1.4.9.9000, <https://github.com/r-lib/httr>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {httr: Tools for Working with URLs and HTTP},
    author = {Hadley Wickham},
    year = {2026},
    note = {R package version 1.4.9.9000},
    url = {https://github.com/r-lib/httr},
  }
