Kyoto Encyclopedia of Genes and Genomes (KEGG)

Kyoto Encyclopedia of Genes and Genomes (KEGG) info API

Display database release information and statistics

Documentation GitHub OpenAPI

Specifications

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OpenAPI

https://raw.githubusercontent.com/api-evangelist/kegg/refs/heads/main/openapi/kegg-info-api-openapi.yml

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OpenAPI Specification

openapi: 3.1.0
info:
  title: KEGG REST conv info API
  description: 'The Kyoto Encyclopedia of Genes and Genomes (KEGG) REST API 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; commercial use requires a license from Pathway Solutions. Rate limit is 3 requests per second per client.

    '
  version: 1.0.0
  contact:
    name: KEGG Support
    url: https://www.kegg.jp/kegg/feedback.html
  termsOfService: https://www.kegg.jp/kegg/legal.html
  license:
    name: Academic Use Only
    url: https://www.kegg.jp/kegg/legal.html
servers:
- url: https://rest.kegg.jp
  description: KEGG REST API server
tags:
- name: info
  description: Display database release information and statistics
paths:
  /info/{database}:
    get:
      operationId: getInfo
      summary: Get database information
      description: 'Display release information and statistics for a KEGG database, including the number of entries and linked databases.

        '
      tags:
      - info
      parameters:
      - name: database
        in: path
        required: true
        description: 'KEGG database name. Valid values include: kegg, pathway, brite, module, ko, genes, genome, ligand, compound, glycan, reaction, rclass, enzyme, network, variant, disease, drug, dgroup, and any organism code (e.g., hsa, eco).

          '
        schema:
          type: string
          enum:
          - kegg
          - pathway
          - brite
          - module
          - ko
          - genes
          - genome
          - ligand
          - compound
          - glycan
          - reaction
          - rclass
          - enzyme
          - network
          - variant
          - disease
          - drug
          - dgroup
      responses:
        '200':
          description: Database release information and statistics
          content:
            text/plain:
              schema:
                type: string
              example: "pathway          Release 113.0+/09-25, Sep 24\n                 Kanehisa Laboratories\nKEGG PATHWAY Database\n# of pathways:   572\n# of genes:      8,022 (hsa)\n"
        '400':
          description: Bad request — invalid database name or syntax error
        '404':
          description: Not found — database does not exist
externalDocs:
  description: KEGG API Documentation
  url: https://www.kegg.jp/kegg/rest/keggapi.html