Open WebUI · Rate Limits

Open Webui Rate Limits

Open WebUI does not impose project-level API rate limits. Effective limits are determined by (1) the upstream LLM backend's limits (Ollama concurrency, or OpenAI/Anthropic RPM caps) and (2) any reverse-proxy or admin throttling configured in the deployment. Standard HTTP semantics apply.

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

It captures 2 rate-limit definitions, measuring n/a and requests.

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 2 backoff/retry policies defined and response codes documented for throttled.

Tagged areas include LLM, Open Source, Self-Hosted, Ollama, and Chat UI.

2 Limits Exhausted: HTTP 429
Method: generated, dated 2026-05-08.
Written by API Evangelist on 2026-05-08 and not verified against a page the provider published. Treat every limit as unconfirmed until a dated transcription replaces it.
View Source
LLMOpen SourceSelf-HostedOllamaChat UIRAGRate LimitingQuotasThrottling

Limits

Project-level n/a
n/a
no built-in cap
Open WebUI itself does not throttle; configure at reverse proxy if needed.
Upstream LLM backend external
requests
backend-defined
Ollama concurrency or OpenAI/Anthropic RPM caps apply.

Policies

Reverse-Proxy Throttling
Use Nginx/Caddy/Traefik in front of Open WebUI to enforce per-IP or per-user limits if needed.
Backend Concurrency
Tune Ollama OLLAMA_NUM_PARALLEL or OPENAI_API_BASE_URLS to spread load.

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.
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Call it yourself

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

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