Table of Contents

  1. Introduction to API Manager
  2. Administration
  3. Organization policies
  4. Analytics

API Manager Guide

API Manager Guide

Configuring an API-specific rate limit policy

Configuring an API-specific rate limit policy

Create a rate limit policy for a specific managed API. The rate limit policy controls the number of times API consumers can invoke the API during a designated time period.
The API-specific rate limit overrides the organizational rate limit policy. For example, if the organizational rate limit is 10 invocations per second, and the API-specific rate limit is 20 invocations per second, API Manager rejects attempts to access the API after the 20 invocations per second limit is reached.
If a rate limit policy is not defined for a managed API, or if the API-specific rate limit policy is disabled, API Manager applies the organizational rate limit policy to the API.
When an API consumer attempts to access a managed API and access is denied due to a rate limit policy, the HTTP response includes a 429 Too Many Requests status code and the description API rate limit reached. API Manager logs an access exception in the event log. For more information about the event log, see Event log.
  1. In the API Registry page, click to select a managed API, or click to open the Actions menu and select View API Details.
    The API details window appears.
  2. Select the Policies tab.
  3. Select Enable API-specific rate limit policy, enter the number of requests and the number of milliseconds that define the rate limit policy, and then click Save.
    To disable the API-specific rate limit policy for the API, clear the option Enable API specific rate limit policy, and then click Save.


Updated September 11, 2019


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