The following people have made contributions to the project (in alphabetical order by last name) and are considered "The Harmonica Developers":
- Vanderlei C Oliveira Jr - Observatório Nacional, Brazil (ORCID: 0000-0002-6338-4086)
- Agustina Pesce - Universidad Nacional de San Juan, Argentina (ORCID: 0000-0002-5538-8845)
- Nicholas Shea - MINES ParisTech (ORCID: 0000-0001-6007-5686)
- Santiago Soler - CONICET, Argentina; Instituto Geofísico Sismológico Volponi, Universidad Nacional de San Juan, Argentina (ORCID: 0000-0001-9202-5317)
- Leonardo Uieda - University of Liverpool, UK (ORCID: 0000-0001-6123-9515)
- ziebam (not included in Zenodo)