specification: API Commons Rate Limits
specificationVersion: '0.1'
schema: https://raw.githubusercontent.com/api-evangelist/interface-research/main/schema/api-commons.yml#/$defs/RateLimits
provider: National Cheng Kung University
providerId: ncku
created: '2026-06-03'
modified: '2026-09-01'
reconciled: false
generated: '2026-09-01'
method: derived
source: apis.yml + live probes of data.ncku.edu.tw on 2026-09-01
tags:
- Education
- Higher Education
- University
- Rate Limiting
description: >-
  National Cheng Kung University publishes no rate-limit table for any of its surfaces. The one
  institution-operated machine-readable endpoint verified on 2026-09-01 — the CKAN Action API at
  data.ncku.edu.tw — answered anonymous calls without throttling and declares no documented limit;
  data.ncku.edu.tw/robots.txt asks crawlers for a 10-second delay and disallows /api/, which is a
  politeness directive rather than an enforced control. No OAI-PMH, IIIF or library harvesting
  endpoint was reachable, so no limit is asserted for any of them.
notes: Confirm per-service limits with each API's documentation; harvest responsibly.
sources:
- https://raw.githubusercontent.com/api-evangelist/ncku/refs/heads/main/apis.yml
responseCodes:
  throttled: 429
limits:
- name: Default
  scope: client
  metric: requests-per-minute
  limit: see service documentation
  notes: No published global limit; large harvests may be rate-limited.
policies:
- name: Backoff Strategy
  description: Exponential backoff with jitter; honor Retry-After; harvest during off-peak hours.
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com