Cloud_enum is an open source intelligence (OSINT) tool that performs enumeration of publicly accessible resources across multiple cloud platforms including Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform (GCP). The tool assists security professionals in identifying exposed cloud resources during security assessments and penetration testing activities. It systematically searches for publicly accessible storage buckets, databases, and other cloud services that may contain sensitive information or present security risks. Cloud_enum operates by querying various cloud service endpoints and APIs to discover resources that are publicly accessible or misconfigured. The tool supports automated scanning across different cloud providers, allowing security researchers to efficiently map an organization's cloud attack surface. The enumeration process helps identify potential security exposures such as open S3 buckets, publicly accessible Azure storage accounts, and misconfigured Google Cloud Storage buckets. This information can be valuable for both offensive security testing and defensive security posture assessment.