Amazon ECS · Rate Limits

Amazon Ecs Rate Limits

Amazon ECS API requests are throttled per-account, per-Region using AWS's standard token-bucket model. Throttle limits are not publicly published per action and can be increased via Service Quotas or AWS Support. ThrottlingException / RequestLimitExceeded responses signal throttling. AWS recommends exponential backoff with jitter (truncated binary, max 20s) and the standard SDK retry mode.

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

It captures 2 rate-limit definitions, measuring varies.

Limit state is signalled in the requestId and retryAfter response headers, and an exhausted limit returns HTTP 400.

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 4 backoff/retry policies defined and response codes documented for throttled, throttledLegacy, and serviceUnavailable.

Tagged areas include Rate Limiting, Amazon, Containers, and ECS.

2 Limits Exhausted: HTTP 400 requestIdretryAfter
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 LimitingAmazonContainersECS

Limits

Per-account ECS API throttling account/region
varies
see Service Quotas console for ECS
Limits vary per API action (e.g. RunTask, DescribeServices) and per Region. Defaults are not publicly listed; use the Service Quotas console or open a support case to view or raise.
ECS Anywhere registration account/region
varies
see Service Quotas console for ECS
Same throttling envelope; subject to ECS Anywhere quota for external instance registrations per cluster.

Policies

Standard retry mode
AWS SDKs default to standard retry mode with truncated binary exponential backoff and jitter (b * 2^i, capped at 20s) and a max of 3 attempts unless overridden.
Adaptive retry mode
Optional client-side rate limiting via token bucket; recommended only when clients are pooled per throttle scope (region + resource).
Quota increases
Most ECS quotas (cluster count, services per cluster, tasks per service, API TPS) can be raised via the Service Quotas console or AWS Support.
ThrottlingException response
AWS returns HTTP 400 with error code ThrottlingException or RequestLimitExceeded; legacy services may return 503. Honor Retry-After when present.

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

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