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Is KEGG API down?

Current status, daily uptime history and troubleshooting for the KEGG API (Science & Math).

No, KEGG is up

KEGG answered our last daily check (Oct 24, 2026, 12:25 UTC) in 1825 ms with HTTP 200.

Checking KEGG now…

Sending a request from our server.

KEGG API uptime history

30 days agoLatest check
Uptime
2 checks so far
Last check
Oct 24, 2026, 12:25 UTC
Response
1825 ms · HTTP 200
Last up
Now

We check KEGG's listed URL (https://www.kegg.jp/kegg/rest/keggapi.html) once a day. History started when KEGG was first checked, so new entries show fewer than 30 days.

KEGG API not working for you?

  1. A 429 response means you're being rate-limited. Slow down, cache responses, and respect any Retry-After header.
  2. If calls fail only in the browser with a CORS error, KEGG may not allow cross-origin requests. Call it from your server instead.
  3. If it works from one network but not another, check firewalls, VPNs and regional blocks.
  4. Check the provider's documentation, status page or social accounts for planned maintenance or a changed endpoint.

Science & Math APIs up at their last check

  1. 1GBIF logo

    GBIF API

    Online · 115 ms

    Global Biodiversity Information Facility. A free science & math API by gbif.org.

    • No API key needed
    • Fast: 115 ms response
    • Callable from the browser (CORS)
    • HTTPS
    No authHTTPSCORS
  2. 2Macrostrat logo

    Macrostrat API

    Online · 694 ms

    Geologic maps, rock columns and stratigraphy data.

    • No API key needed
    • Returns JSON at its URL
    • Callable from the browser (CORS)
    • HTTPS
    No authHTTPSCORS
  3. 3Chempirical logo

    Chempirical API

    Online · 533 ms

    Chemical compounds with physical data, reactions and substructure search.

    • No API key needed
    • Callable from the browser (CORS)
    • HTTPS
    No authHTTPSCORS
  4. 4CycleCalcs logo

    CycleCalcs API

    Online · 714 ms

    Interpreted astronomy: sun and moon times, moon phases, planets, eclipses, seasons.

    • No API key needed
    • Callable from the browser (CORS)
    • HTTPS
    No authHTTPSCORS
  5. 5Europe PMC logo

    Europe PMC API

    Online · 118 ms

    Life-science literature search with abstracts, citations and full-text links.

    • No API key needed
    • Fast: 118 ms response
    • Callable from the browser (CORS)
    • HTTPS
    No authHTTPSCORS

Compare all KEGG alternatives · APIs down right now

KEGG API status FAQ

Is KEGG API down right now?

KEGG answered our last daily check (Oct 24, 2026, 12:25 UTC) in 1825 ms with HTTP 200. This page also runs a live check from our server when you open it, so you can see whether KEGG is responding at this moment.

How do you check whether KEGG API is up?

Once a day our checker requests KEGG's listed URL (https://www.kegg.jp/kegg/rest/keggapi.html) and records whether it answers within 15 seconds. Answers like 401 (needs a key), 403 (blocks bots) or 429 (rate-limited) count as up, because the server responded. The listed URL is often the documentation page, so an API endpoint can occasionally fail while its docs stay up.

What can I use if KEGG API is down?

Free Science & Math APIs that were up at their last check include GBIF, Macrostrat, Chempirical. See the full list of KEGG alternatives for a comparison.

Why does KEGG API work for others but not for me?

A 429 response means you're being rate-limited. Slow down, cache responses, and respect any Retry-After header. If calls fail only in the browser with a CORS error, KEGG may not allow cross-origin requests. Call it from your server instead. If it works from one network but not another, check firewalls, VPNs and regional blocks.