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.Restriction: KEGG API is provided for academic use by academic users belonging to academic institutions.
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
| December 1, 2017 | NETWORK and VARIANT released |
| September 1, 2017 | Options json for brite and conf for pathway included in get |
| August 1, 2017 | Brite table files and xl files included in list and get |
| June 1, 2017 | PubMed is included in link, Linked db displayed in info |
| December 1, 2016 | New output format of list for GENES |
| October 1, 2016 | RPAIR removed |
| February 1, 2016 | New version of link and conv without using LinkDB |
| September 1, 2015 | NCBI-ProteinID added to conv |
| July 1, 2014 | DGROUP added |
| June 1, 2014 | RDF format supported for link in KEGG MEDICUS |
| April 1, 2014 | NDC (National Drug Code) added to DDI search |
| April 1, 2013 | KEGG MEDICUS API released |
| February 1, 2013 | (WebLinks) Pathway map coloring by POST method |
| January 18, 2013 | KGML file retrieval, genes database in conv and link |
| July 25, 2012 | HTTP status code implemented |
| July 17, 2012 | Added: /find/<database>/<query>/<option> |
| July 6, 2012 | Added: /list/<database>/<org> |
| June 20, 2012 | First release |
Past announcements
Notice to KEGG API users: conv and link problems
Since around August 21, the update of the LinkDB database at GenomeNet has become unstable due to the huge increase of the data size. As the result, the conv and link operations of KEGG API sometimes do not return any result.
We are working on a new method that does not depend on LinkDB.
In the meantime please report any problems through the KEGG/GenomeNet feedback form.
Posted on September 22, 2015
A new version of link and conv operations is released.
This version does not include indirect links that were computationally generated in LinkDB, such as:
Posted on February 1, 2016
Updated on February 24, 2016
Since around August 21, the update of the LinkDB database at GenomeNet has become unstable due to the huge increase of the data size. As the result, the conv and link operations of KEGG API sometimes do not return any result.
We are working on a new method that does not depend on LinkDB.
In the meantime please report any problems through the KEGG/GenomeNet feedback form.
Posted on September 22, 2015
A new version of link and conv operations is released.
This version does not include indirect links that were computationally generated in LinkDB, such as:
/link/cpd/hsa
which no longer works. Instead, please use the combination of:
/link/ko/hsa
/link/rn/ko
/link/cpd/rn
/link/rn/ko
/link/cpd/rn
Posted on February 1, 2016
Updated on February 24, 2016
Last updated: January 30, 2019