To cite package ‘httptest’ in publications use:

  Richardson N (2024). _httptest: A Test Environment for HTTP
  Requests_. R package version 4.2.2.9000, ,
  <https://github.com/nealrichardson/httptest>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {httptest: A Test Environment for HTTP Requests},
    author = {Neal Richardson},
    year = {2024},
    note = {R package version 4.2.2.9000, 
},
    url = {https://github.com/nealrichardson/httptest},
  }