We have an API that can take a long time to respond. After enabling API Connect from API Management --> Expose Managed API, a 504 Gateway Time-out error is returned after 60 seconds. We've tried configuring the timeout from the Open API configuration file under x-ibm-configuration - assembly - execute - proxy and invoke but it doesn't seem to have any effect. API Connect team confirms that the gateway timeout for API Management on IBM Cloud is set to 60 seconds and is not configurable per API basis.
If that is the case, please consider to document this restriction in Knowledge Center or somewhere else.
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