Australian National University · Rate Limits

Anu Rate Limits

ANU publishes no unified rate-limit table across its APIs, but one hard, published limit does exist and was confirmed by live probe on 2026-08-19: the deprecated QRNG@ANU legacy endpoint is throttled to ONE request per minute. Critically, it does NOT signal that with 429 — it returns HTTP 200 with a plain-text sentence in place of the JSON envelope, and emits no Retry-After header. A client that branches on status code will ingest the refusal as data. The current AQN service meters per API key through an AWS API Gateway usage plan whose numbers ANU does not publish. OAI-PMH harvesting is unmetered but should be polite.

Anu Rate Limits is the machine-readable rate-limit profile for Australian National University on the APIs.io network, conforming to the API Commons Rate Limits specification.

It captures 3 rate-limit definitions, measuring requests-per-minute, requests-per-key, and none-published.

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

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

3 Limits Throttle: 200
EducationHigher EducationUniversityRate Limiting

Limits

QRNG@ANU legacy JSON API client
requests-per-minute
1
ANU Quantum Numbers (AQN) API api-key
requests-per-key
unpublished
Quota values are not published. A free key is issued self-serve.
ANU Open Research OAI-PMH client
none-published
unpublished
No documented limit. Use resumptionToken paging and harvest off-peak.

Policies

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

Sources