Istio · Rate Limits

Istio Rate Limits

Istio is open-source software, not a hosted SaaS, so there are no provider-enforced API rate limits. The "Istio APIs" are Kubernetes Custom Resources (VirtualService, DestinationRule, Gateway, AuthorizationPolicy, etc.) read and written via the Kubernetes API server. Rate limiting in an Istio mesh is something operators *configure* (local rate limit via Envoy, or global rate limit via an external rate-limit service) — it is not enforced against Istio itself.

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

It captures 1 rate-limit definition, measuring varies.

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 Rate Limiting, Service Mesh, Open Source, and Networking.

1 Limits Exhausted: HTTP 429
Method: generated, dated 2026-05-05.
Written by API Evangelist on 2026-05-05 and not verified against a page the provider published. Treat every limit as unconfirmed until a dated transcription replaces it.
View Source
Rate LimitingService MeshOpen SourceNetworking

Limits

Self-managed cluster
varies
operator-configured

Policies

Operator-controlled
Throughput against Istio control-plane CRDs is governed by the underlying Kubernetes API server; clients should respect kube-apiserver QPS/burst settings.
In-mesh rate limiting
Use Istio's local rate limit (Envoy local rate limit filter) for per-instance limits and the global rate limit pattern (Envoy + ext_authz to a rate-limit service) for shared quotas.
No vendor SaaS limit
Istio itself does not impose a service-side rate limit; community / vendor distributions may set their own SLOs.

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

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