KEGG API

KEGG API (application programming interface) allows customization of KEGG-based analysis, such as for searching and computing biochemical pathways in cellular processes or analyzing the universe of genes in the completely sequenced genomes.

Restrictions: KEGG API is provided for use by academic users for academic purposes. This service should not be used for bulk data downloads. Please obtain KEGG FTP academic subscription for downloading KEGG data.

REST API

Update history

Transition from SOAP to REST In the KEGG release 63.0 on July 1, 2012 a new version of the KEGG API was made available. It is a REST-based API service, replacing the previous SOAP-based API service. The new service contains most of the capabilities of the previous service, and provides additional features for systematically handling KEGG identifiers. For example, /list/hsa will list the entire set of human genes, /conv/ncbi-gi/hsa will convert the entire set of KEGG human gene identifiers to NCBI gi numbers (and vice versa), and /link/pathway/hsa will identify KEGG pathway maps that contain each of the human genes. It is also possible to limit the gene set by changing "hsa" to "hsa:10" for a single gene, "hsa:10+hsa:100" for two genes, etc. The previous SOAP-based API service has not been updated for five years (see ChangeLog) and has become obsolete in certain aspects. Because the original developer is no longer with us at KEGG, we have decided to move to the new service with a much simpler design. The old service will continue to be accessible for six months, until December 31, 2012. Posted on June 4, 2012 Revised on July 1, 2012

The old SOAP API service has been terminated.

Last updated: April 1, 2013