STAR Registry Listing for
CellGuard
CellGuard
CellGuard is a remote service, delivered over the Model Context Protocol, that verifies AI proposed edits to financial spreadsheets before they are written. For each edit it returns a block, warn, or pass verdict from named deterministic rules, and records the decision on a tamper-evident, SHA-256 hash-chained audit log. It processes workbook content transiently without durably retaining it, runs no machine learning model, and authenticates access with OAuth 2.1.
Listed Since: 06/21/2026
STAR Level 1
CAIQ Self-assessment v4.0.3
Offers an industry-accepted way to document what security controls exist in IaaS, PaaS, and SaaS services. It provides a set of Yes/No/NA questions and space to justify the response a cloud consumer and cloud auditor may wish to ask of a cloud provider to ascertain their compliance to the Cloud Controls Matrix (CCM).
Created or renewed about 2 months ago, on June 21, 2026.
