The OPTIMADE API has been developed with contributions by the participants of the workshops "Open Database Integration for Materials Design", held at:
- the Lorentz Center in Leiden, Netherlands from 2016-10-24 to 2016-10-28
- the CECAM in Lausanne, Switzerland from 2018-06-11 to 2018-06-15
- the CECAM in Lausanne, Switzerland from 2019-06-11 to 2019-06-14
- the CECAM in Lausanne, Switzerland (virtually) 2020-06-08 to 2020-06-12
- the CECAM in Lausanne, Switzerland (virtually) 2021-06-07 to 2021-06-11
- the CECAM in Lausanne, Switzerland 2022-05-30 to 2022-06-03
- the CECAM in Lausanne, Switzerland 2023-06-05 to 2023-06-09

Initial and major contributors to the development of the OPTIMADE specification and implementation in alphabetical order:
Casper Andersen
Oskar Andersson
Thomas Archer
Rickard Armiento
Rossella Aversa
Daniel Beltrán
Johan Bergsma
Evgeny Blokhin
Tara Boland
Sara Bonella
Kamal Choudhary
Pauline Colinet
Gareth Conduit
Stefano Curtarolo
Davide Di Stefano
Alexander Dorsk
Claudia Draxl
Shyam Dwaraknath
Kristjan Eimre
Suleyman Er
Marco Esters
Matthew Evans
Ádám Fekete
Marco Fornari
Matteo Giantomassi
Abhijith Gopakumar
Marco Govoni
Saulius Gražulis
Geoffroy Hautier
Vinay Hegde
Matthew Horton
Patrick Huck
Georg Huhs
Jens Hummelshoej
Karsten W. Jacobsen
Ankit Kariryaa
Boris Kozinsky
Adam Krajewski
Snehal Kumbhar
Mohan Liu
Zi-Kui Liu
Nicola Marzari
Andrius Merkys
Fawzi Mohamed
Jens Jørgen Mortensen
Andrew Morris
Arash Mostofi
Corey Oses
Kristin Persson
Guido Petretto
Giovanni Pizzi
Thomas Purcell
Francesco Ricci
Gian-Marco Rignanese
Frisco Rose
Matthias Scheffler
Markus Scheidgen
Daniel Speckhard
Leopold Talirz
Cormac Toher
Martin Uhrin
Antanas Vaitkus
Pierre Villars
David Waroquiers
Donald Winston
Chris Wolverton
Michael Wu
Yibin Xu
Xiaoyu Yang
Jusong Yu
