Version 6.3 (2604) of the platform has been released — see full details below.

Summary

CoreStack v6.3 (2604) extends multi-cloud cost visibility and standards-based cost ingestion to Oracle Cloud Infrastructure (OCI), bringing all four supported providers — AWS, Azure, GCP, and OCI — onto a common FOCUS-aligned cost model. Rightsizing recommendations now check existing RI and commitment coverage before firing, Savings Plan Utilization gains potential-savings and additional commitment metrics for AWS and Azure, budget alerts can route to Slack, and the Consolidated Charges Report now supports up to 20 Group By dimensions for MSP and Distributor reporting. On the AI front, CoreStack MCP moves to OAuth-based authentication and a single unified server, and can now be added as a custom connector in Claude and ChatGPT or as a custom agent in Microsoft Copilot. Platform closes the last AWS-only gap in SaaS account onboarding by adding native storage support for Azure, GCP, and OCI.

FinOps

Added OCI Cost Dashboard — Effective Cost in Multi-Cloud Dashboard — Adds Oracle Cloud Infrastructure (OCI) effective cost to the Multi-Cloud Dashboard alongside AWS, Azure, and GCP, so OCI customers can analyze spend side-by-side with other providers without exporting data separately.
Changed Rule-Based Rightsizing — RI and Commitment Coverage Awareness — Rightsizing and idle-resource recommendations now cross-reference active Reserved Instance (RI) and commitment coverage before firing, so teams no longer receive rightsizing suggestions that conflict with, or waste, existing commitments.
Changed FOCUS-Based CUR Support — Extended to Azure, GCP, and OCI — Extends FOCUS (FinOps Open Cost and Usage Specification)-based Cost and Usage Report (CUR) ingestion, previously AWS-only, to Azure, GCP, and OCI, bringing every supported provider's cost data onto a single, standards-aligned model and reducing custom mapping work for teams already using FOCUS for AWS.
Added Budget Management — Slack Notification Support — Budget alerts can now be delivered to Slack via webhook alongside existing notification channels, putting threshold alerts directly into the team's existing Slack workflow.
Changed Current Savings Plan Utilization — Potential Savings and Additional Commitment Metrics — The Savings Plan Utilization page for AWS and Azure now also surfaces Total/Used/Unused Commitment, Net Savings, Potential Savings, On-Demand Cost Equivalent, and Region (for EC2 Instance Savings Plans), giving FinOps teams a complete financial picture of savings plan performance in one view.
Changed Consolidated Charges Report — Expanded Group By Support — Raises the Consolidated Charges Report's Group By limit from 10 to 20 dimensions, enabling deeper multi-dimensional chargeback, showback, and profitability breakdowns across complex MSP and Distributor client hierarchies.

AI Agents

Changed CoreStack MCP — OAuth Support and Unified MCP — CoreStack MCP now supports OAuth-based authentication and consolidates CoreStack's MCP tools into a single unified server, replacing the need to configure and connect to multiple separate MCP endpoints.
Added CoreStack MCP — Custom Connector Support for Claude, ChatGPT, and Microsoft Copilot — CoreStack MCP can now be added as a custom connector in Claude and ChatGPT, and as a custom agent in Microsoft Copilot, so teams can access CoreStack data and actions directly from the AI assistants they already use daily.

Platform

Added Multi-Cloud Storage Support for SaaS Account Onboarding — Extends the SaaS account onboarding wizard to support Azure Blob Storage, Google Cloud Storage, and OCI Object Storage alongside AWS, including the ability to edit storage credentials post-onboarding with a safety guard that preserves existing credentials if new ones fail validation — closing the last AWS-only gap in the onboarding workflow.

External APIs

API changes in this release: External APIs 6.3 (2604)
Full API reference: https://docs.corestack.io/reference/accesssummarycount