KEGG icon


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.

Restriction: KEGG API is provided for academic use by academic users belonging to academic institutions.

Announcement: Minor update of KEGG API

Starting on March 1, 2023 the list operation of KEGG API returns KEGG identifiers without the database name in most cases, in compatible with the form shown in Figure 1 of the recent NAR article.

Posted on February 20, 2023

REST API and WebLinks

The REST-style KEGG API may be supplemented with KEGG WebLinks for obtaining HTML pages. Please refer to the following documents.

Update history
March 1, 2023Output format of list uses simplified KEGG identifiers
October 1, 2022/list/<org> includes chromosomal positions
June 1, 2022Moved from HTTP to HTTPS
December 1, 2017NETWORK and VARIANT released
September 1, 2017Options json for brite and conf for pathway included in get
August 1, 2017Brite table files and xl files included in list and get
June 1, 2017PubMed is included in link, Linked db displayed in info
December 1, 2016New output format of list for GENES
October 1, 2016RPAIR removed
February 1, 2016New version of link and conv without using LinkDB
September 1, 2015NCBI-ProteinID added to conv
July 1, 2014DGROUP added
June 1, 2014RDF format supported for link in KEGG MEDICUS
April 1, 2014NDC (National Drug Code) added to DDI search
April 1, 2013KEGG MEDICUS API released
February 1, 2013(WebLinks) Pathway map coloring by POST method
January 18, 2013KGML file retrieval, genes database in conv and link
July 25, 2012HTTP status code implemented
July 17, 2012Added: /find/<database>/<query>/<option>
July 6, 2012Added: /list/<database>/<org>
June 20, 2012  First release

Last updated: March 1, 2023

Copyright 1995-2023 Kanehisa Laboratories