Skip to content


Repository files navigation

OmaDB: R wrapper for the OMA REST API

R package providing access to the data in the OMA browser, using the REST API. As such, it requires a stable internet connection to operate. We also provide a similar wrapper for python (

An notebook containing examples of how to use the package is available here.



If you use our package in your work, please consider citing:

Kaleb K, Warwick Vesztrocy A, Altenhoff A and Dessimoz C. Expanding the Orthologous Matrix (OMA) programmatic interfaces: REST API and the OmaDB packages for R and Python. F1000Research 2019, 8:42 (


The package is available via Bioconductor ( and can be installed as follows:

if (!requireNamespace("BiocManager"))

#load the package

Note that the v2.0 of the package requires R version >= 3.6 and Bioconductor version >=3.9.

The latest version of the OmaDB package can also be directly installed from the github repository as below:



OmaDB is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

OmaDB is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with OmaDB. If not, see