To cite package ‘xmlrpc2’ in publications use:

  Schwendinger F (2025). _xmlrpc2: Implementation of the Remote
  Procedure Call Protocol ('XML-RPC')_. R package version 1.2,
  <https://github.com/florianschwendinger/xmlrpc2>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {xmlrpc2: Implementation of the Remote Procedure Call Protocol ('XML-RPC')},
    author = {Florian Schwendinger},
    year = {2025},
    note = {R package version 1.2},
    url = {https://github.com/florianschwendinger/xmlrpc2},
  }