This documentation is for WSO2 API Manager 1.9.0. View documentation for the latest release.

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When an API call hits the API Gateway, the Gateway carries out security checks to verify if the token is valid. During these verifications, the API Gateway extracts parameters such as access token, API and API version that are passed on to it. Since the entire load of traffic to APIs goes through the API Gateway, this verification process needs to be fast and efficient in order to prevent overhead and delays. The API Manager uses caching for this purpose, where the validation information is cached with the token, API name and version, and the cache is stored in either the API Gateway or the key manager serverKey Validator server.

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