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DimensionMirageA unified virtual filesystem that lets AI agents use bash across cloud storage, SaaS, and databases.Filesystem MCP ServerSecure local file read/write access
FMRS47 / 100 · D84 / 100 · B
Reliability6 / 2017 / 20
Security and permissions8 / 2016 / 20
Maintenance10 / 2016 / 20
Documentation12 / 2017 / 20
Setup experience11 / 2018 / 20
Best for
  • AI agent developers who already use bash and want one filesystem interface instead of many SDKs/MCPs
  • Workflows that need to pipe data between S3, Google Drive, Slack, OneDrive/SharePoint, and similar backends
  • Teams embedding an agent workspace directly inside a Python/TypeScript app (FastAPI, Express, etc.)
  • Local assistants that need to work inside explicitly approved directories
  • Individuals and development teams that want path-based data boundaries
Not for
  • Simple single-service use cases that don't need a unified cross-backend interface
  • Non-macOS/Linux environments where FUSE-based mounts aren't supported
  • High-security scenarios requiring fine-grained, per-action permission control rather than a general bash execution interface
  • Highly sensitive environments that cannot allow model access to local file contents
  • Shared remote file-service use cases
Required permissions
  • Access credentials or API tokens for each mounted backend (e.g., OneDrive, SharePoint, S3, Slack, Gmail)
  • Local filesystem read/write access (for RAM/Disk resources and caching)
  • Outbound network access to reach remote backend APIs
  • Read access to every local directory listed in the configuration
  • Filesystem write access when write or move tools are enabled
Risks and side effects
  • A single bash-like execution interface can let an agent broadly read, copy, or overwrite data across every mounted, potentially sensitive backend
  • Content pulled in from mounted sources (e.g., Slack messages, email) carries prompt-injection risk that could influence subsequent agent behavior
  • Index and file caches (default TTL 10 minutes / default 512MB) can serve stale data until they expire
  • Once credentials are configured for a workspace, an agent may end up with broader cross-service access than intended for a given task
  • Sensitive files inside an allowed directory may enter model context
  • Write and move tools change real files; keep scopes narrow and maintain backups
Supported clientsClaude CodeClaude Desktop, Cursor, Cline, Windsurf
Tools16