University of Hong Kong · Rate Limits

Hku Rate Limits

The University of Hong Kong publishes no rate-limit table for any surface. Corrected 2026-08-19: an earlier version of this file referred to open metadata, IIIF and library endpoints that were never found. The APIs HKU actually gates — the GenAI APIs behind api.hku.hk — run on Azure API Management, whose per-product quota and rate-limit policies are configured by HKU ITS and are not visible without institutional sign-in. Identity metadata documents (SAML metadata, OIDC discovery, JWKS) are static and cacheable and imposed no observable limit across the probes run on 2026-08-19. hub.hku.hk applies a Cloudflare managed challenge to automated clients, which is a bot policy rather than a rate limit, and it blocks OAI-PMH harvesting outright.

Hku Rate Limits is the machine-readable rate-limit profile for University of Hong Kong on the APIs.io network, conforming to the API Commons Rate Limits specification.

It captures 3 rate-limit definitions, measuring requests-per-minute.

The profile also includes 1 backoff/retry policy defined and response codes documented for throttled.

Tagged areas include Education, Higher Education, University, and Rate Limiting.

3 Limits Throttle: 429
EducationHigher EducationUniversityRate Limiting

Limits

HKU GenAI APIs (api.hku.hk) subscription-key
requests-per-minute
not-published
Azure API Management rate-limit and quota policies are set per product by HKU ITS; not readable without a portal account.
Identity metadata (adfs.hku.hk, hkafidp.hku.hk) client
requests-per-minute
none-observed
Static signed documents; no 429 and no Retry-After seen across repeated probes on 2026-08-19.
Institutional repository (hub.hku.hk) client
requests-per-minute
blocked
Cloudflare managed challenge returns 403 to automated clients before any limit applies.

Policies

Backoff Strategy
Exponential backoff with jitter; honor Retry-After; harvest during off-peak hours.

Sources

Work with this as data

Every rate limit here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for rate limits

4 MCP tools reach this
  • find_rate_limitsBrowse and filter every rate limit in the catalog.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This rate limit 
curl "https://apis.io/api/v1/rate-limits/hku-rate-limits"
All rate limits 
curl "https://apis.io/api/v1/rate-limits?limit=25"

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