OpenClinica · Rate Limits

Openclinica Rate Limits

OpenClinica does not publish fixed numeric REST API rate limits. Access is gated by OAuth 2.0 bearer tokens and by the study/site privileges of the authenticating user rather than by a documented per-minute request cap. On the self-hosted Community Edition, throughput is bounded by your own infrastructure. On Enterprise (hosted) instances, practical throughput is governed by the hosted environment and your agreement. Large data movements are designed to run as asynchronous bulk operations (bulk participants, bulk events, extracts) whose status is tracked through the bulk actions log, rather than as many small synchronous calls.

Openclinica Rate Limits is the machine-readable rate-limit profile for OpenClinica on the APIs.io network, in the API Commons Rate Limits shape.

It captures 4 rate-limit definitions, measuring requests, records, and seconds.

An exhausted limit returns HTTP 429.

This profile was written by API Evangelist and has not been verified against a page the provider published; treat every limit as unconfirmed until a dated transcription replaces it.

The profile also includes 3 backoff/retry policies defined and response codes documented for throttled.

Tagged areas include Clinical Trials, Electronic Data Capture, EDC, Rate Limiting, and Quotas.

4 Limits Exhausted: HTTP 429
Method: generated, dated 2026-07-05.
Written by API Evangelist on 2026-07-05 and not verified against a page the provider published. Treat every limit as unconfirmed until a dated transcription replaces it.
View Source
Clinical TrialsElectronic Data CaptureEDCRate LimitingQuotas

Limits

REST API Requests account
requests
not published
No fixed numeric request-rate limit is documented for the REST API.
Self-Hosted Throughput deployment
requests
hardware-bound
Community Edition throughput is constrained by your own infrastructure.
Bulk Operation Size request
records
configurable via payload
Bulk participant and event endpoints accept a list per request and process it asynchronously.
Token Lifetime account
seconds
per expires_in
OAuth access tokens expire; re-request a token from the user-service token endpoint when expired.

Policies

Authorization Scoping
A user's study and site privileges bound which participants, events, and data the API returns or accepts.
Asynchronous Bulk Processing
Bulk actions run as jobs; poll the bulk actions log for status rather than blocking on large synchronous calls.
Backoff Strategy
Clients should implement exponential backoff with jitter and honor Retry-After on 429 responses.

Sources

Work with this as data

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

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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/openclinica-rate-limits"
All rate limits 
curl "https://apis.io/api/v1/rate-limits?limit=25"

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