@ShwetaB96  There is no explicit limit on the size of the payload for REST requests in Pega. However, sending large payloads, such as a JSON request with an array of 250 items, may have performance implications. It is recommended to use POST for large payloads to avoid URL size limitations. Additionally, choosing an optimal payload size is crucial to avoid performance issues. Monitoring and testing the performance impact in your specific environment is advisable.

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Is there a limit in size for the payload which can be transmitted for REST Respon

Maximum file size that can be sent and received via Pega REST Service / Connec

ile attachment configuration in REST and SOAP integrations > Performance conside

@ShwetaB96

Yes, potentially, it could impact performance and timeout based on the payload size and network bandwidth.  

Web server could have a limitation on the size - Please check https://stackoverflow.com/questions/2880722/can-http-post-be-limitless