Kyoto Encyclopedia of Genes and Genomes (KEGG)
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.
Limited machine-readable signal and partial portal coverage — documentation a human can read, but little a machine or agent can consume without scraping.
API Evangelist profiles Kyoto Encyclopedia of Genes and Genomes (KEGG) the way a machine reads it — 21 machine-readable artifacts across 1 API, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Kyoto Encyclopedia of Genes and Genomes (KEGG) scores 34.7/100 (thin), with a separate agent-readiness read of 26/100 (agent aware). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.
Kin Score
How this is scored →scored 2026-09-08 · rubric v0.20.0
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How we profile Kyoto Encyclopedia of Genes and Genomes (KEGG)
Each block below is one kind of artifact we hold for Kyoto Encyclopedia of Genes and Genomes (KEGG). For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 8
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
KEGG REST API
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 ...
Kyoto Encyclopedia of Genes and Genomes (KEGG) conv API
Convert identifiers between KEGG and external databases
Kyoto Encyclopedia of Genes and Genomes (KEGG) ddi API
Find adverse drug-drug interactions
Kyoto Encyclopedia of Genes and Genomes (KEGG) find API
Search entries by keyword or molecular property
Kyoto Encyclopedia of Genes and Genomes (KEGG) get API
Retrieve specific database entries
Kyoto Encyclopedia of Genes and Genomes (KEGG) info API
Display database release information and statistics
Kyoto Encyclopedia of Genes and Genomes (KEGG) link API
Find related entries using database cross-references
Kyoto Encyclopedia of Genes and Genomes (KEGG) list API
Obtain a list of entry identifiers and associated names
Scroll within the panel for all 8 ·
Open Collections 8
Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
API Collection
OPEN COLLECTIONKEGG REST conv API
OPEN COLLECTIONKEGG REST conv ddi API
OPEN COLLECTIONKEGG REST conv find API
OPEN COLLECTIONKEGG REST conv get API
OPEN COLLECTIONKEGG REST conv info API
OPEN COLLECTIONKEGG REST conv link API
OPEN COLLECTIONKEGG REST conv list API
OPEN COLLECTIONScroll within the panel for all 8 ·
Pricing Plans 1
Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the things the Kin Score reads for access clarity — renamed from commercial clarity in rubric 0.12, because a free statutory interface has access terms and no commercial ones.
Published pricing tiers and plan structures.
Kegg Rest Api
PLANSRate Limits 1
Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.
Documented rate limits and quota policies.
Kegg Rest Api
RATE LIMITSFinOps 1
Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.
Cost, billing, and metering signals for API financial operations.
Overview
FINOPSSecurity Posture 1
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.
Recommended x-agentic-access execution contracts for AI agents.
Resources
Every other property we hold for Kyoto Encyclopedia of Genes and Genomes (KEGG) — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Access & Security 1
Authentication, authorization, and security posture
← All providers · Data indexed from github.com/api-evangelist/kegg · machine-readable index on apis.io
This is an independent, third-party profile of Kyoto Encyclopedia of Genes and Genomes (KEGG), published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
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