The Kyoto Encyclopedia of Genes and Genomes (KEGG) is an integrated database resource for understanding high-level functions and utilities of biological systems from molecular-level information derived from genome sequencing and other high-throughput experiments. The KEGG REST API at rest.kegg.jp provides programmatic access to KEGG databases covering biological pathways, metabolic networks, molecular interactions, drug targets, disease associations, chemical compounds, genomic sequences, and functional orthologs across thousands of organisms. The API exposes seven core operations — info, list, find, get, conv, link, and ddi — enabling identifier conversion, cross-database linking, keyword and structure searches, and full entry retrieval in text, KGML, and JSON formats. Academic use is free via the REST API; FTP and commercial access require subscriptions managed through NPO Bioinformatics Japan and Pathway Solutions.
Kyoto Encyclopedia of Genes and Genomes (KEGG) publishes 7 APIs on the APIs.io network, including conv API, ddi API, find API, and 4 more. Tagged areas include Bioinformatics, Genomics, Life Sciences, Pathways, and Metabolomics.
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The six quality facets above are damped to 85 points between them,
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The KEGG REST API provides unified programmatic access to all KEGG databases through seven operations: INFO (database statistics and release notes), LIST (entry identifiers and ...
name: Kyoto Encyclopedia of Genes and Genomes (KEGG)
description: 'The Kyoto Encyclopedia of Genes and Genomes (KEGG) is an integrated database resource for understanding high-level
functions and utilities of biological systems from molecular-level information derived from genome sequencing and other
high-throughput experiments. The KEGG REST API at rest.kegg.jp provides programmatic access to KEGG databases covering biological
pathways, metabolic networks, molecular interactions, drug targets, disease associations, chemical compounds, genomic sequences,
and functional orthologs across thousands of organisms. The API exposes seven core operations — info, list, find, get, conv,
link, and ddi — enabling identifier conversion, cross-database linking, keyword and structure searches, and full entry retrieval
in text, KGML, and JSON formats. Academic use is free via the REST API; FTP and commercial access require subscriptions
managed through NPO Bioinformatics Japan and Pathway Solutions.
'
url: https://www.kegg.jp/kegg/rest/
accessModel:
pricing: freemium
onboarding: unknown
trial: false
try_now: false
public: false
label: Freemium
confidence: medium
source:
- plans
generated: '2026-07-22'
method: derived
image: https://www.kegg.jp/favicon.ico
tags:
- Bioinformatics
- Genomics
- Life Sciences
- Pathways
- Metabolomics
- Drug Targets
- Disease
- Chemical Compounds
- Enzymes
- Orthology
created: '2026-06-13'
modified: '2026-06-13'
specificationVersion: '0.23'
apis:
- name: KEGG REST API
description: 'The KEGG REST API provides unified programmatic access to all KEGG databases through seven operations: INFO
(database statistics and release notes), LIST (entry identifiers and names), FIND (keyword and molecular weight/formula
search), GET (full entry retrieval in flat-file, KGML, JSON, image, or sequence formats), CONV (identifier conversion
between KEGG and external databases such as NCBI, UniProt, PubChem, and ChEBI), LINK (cross-reference lookup between KEGG
databases), and DDI (adverse drug-drug interaction queries). Databases covered include PATHWAY, BRITE, MODULE, KO, GENES,
GENOME, COMPOUND, GLYCAN, REACTION, ENZYME, DISEASE, DRUG, NETWORK, VARIANT, and DGROUP. The API is restricted to academic
users; commercial use requires a license from Pathway Solutions. Rate limit is 3 requests per second per client.
'
image: https://www.kegg.jp/favicon.ico
humanURL: https://www.kegg.jp/kegg/rest/
baseURL: https://rest.kegg.jp
tags:
- Pathways
- Metabolic Networks
- Genomics
- Drug Targets
- Disease
- Chemical Compounds
- Enzymes
- Identifier Conversion
- Orthology
properties:
- type: Documentation
url: https://www.kegg.jp/kegg/rest/keggapi.html
- type: TermsOfService
url: https://www.kegg.jp/kegg/legal.html
- type: RateLimits
url: https://api-evangelist.github.io/kegg/rate-limits/kegg-rest-api.yml
- type: Plans
url: https://api-evangelist.github.io/kegg/plans/kegg-rest-api.yml
- type: FinOps
url: https://api-evangelist.github.io/kegg/finops/overview.yml
contact:
- FN: KEGG Support
url: https://www.kegg.jp/kegg/feedback.html
- aid: kegg:kegg-conv-api
name: Kyoto Encyclopedia of Genes and Genomes (KEGG) conv API
description: Convert identifiers between KEGG and external databases
humanURL: https://www.kegg.jp/kegg/rest/
baseURL: https://rest.kegg.jp
tags:
- conv
properties:
- type: OpenAPI
url: openapi/kegg-conv-api-openapi.yml
- aid: kegg:kegg-ddi-api
name: Kyoto Encyclopedia of Genes and Genomes (KEGG) ddi API
description: Find adverse drug-drug interactions
humanURL: https://www.kegg.jp/kegg/rest/
baseURL: https://rest.kegg.jp
tags:
- DDI
tags_raw:
- ddi
properties:
- type: OpenAPI
url: openapi/kegg-ddi-api-openapi.yml
- aid: kegg:kegg-find-api
name: Kyoto Encyclopedia of Genes and Genomes (KEGG) find API
description: Search entries by keyword or molecular property
humanURL: https://www.kegg.jp/kegg/rest/
baseURL: https://rest.kegg.jp
tags:
- Find
tags_raw:
- find
properties:
- type: OpenAPI
url: openapi/kegg-find-api-openapi.yml
- aid: kegg:kegg-get-api
name: Kyoto Encyclopedia of Genes and Genomes (KEGG) get API
description: Retrieve specific database entries
humanURL: https://www.kegg.jp/kegg/rest/
baseURL: https://rest.kegg.jp
tags: []
tags_raw:
- get
properties:
- type: OpenAPI
url: openapi/kegg-get-api-openapi.yml
- aid: kegg:kegg-info-api
name: Kyoto Encyclopedia of Genes and Genomes (KEGG) info API
description: Display database release information and statistics
humanURL: https://www.kegg.jp/kegg/rest/
baseURL: https://rest.kegg.jp
tags:
- Info
tags_raw:
- info
properties:
- type: OpenAPI
url: openapi/kegg-info-api-openapi.yml
- aid: kegg:kegg-link-api
name: Kyoto Encyclopedia of Genes and Genomes (KEGG) link API
description: Find related entries using database cross-references
humanURL: https://www.kegg.jp/kegg/rest/
baseURL: https://rest.kegg.jp
tags:
- Link
tags_raw:
- link
properties:
- type: OpenAPI
url: openapi/kegg-link-api-openapi.yml
- aid: kegg:kegg-list-api
name: Kyoto Encyclopedia of Genes and Genomes (KEGG) list API
description: Obtain a list of entry identifiers and associated names
humanURL: https://www.kegg.jp/kegg/rest/
baseURL: https://rest.kegg.jp
tags:
- List
tags_raw:
- list
properties:
- type: OpenAPI
url: openapi/kegg-list-api-openapi.yml
maintainers:
- FN: Kin Lane
email: kin@apievangelist.com
common:
- type: AgenticAccess
url: agentic-access/kegg-agentic-access.yml
- type: DomainSecurity
url: security/kegg-domain-security.yml
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