mcp-outlook-lite (w21180239/mcp-outlook-lite) is an MCP server listed on the M8ven Trust Index. It scores 70 out of 100, grade C. It declares 46 tools. No publisher has claimed this listing.

Back to MCP Trust IndexM8ven
C
Caution
70/100

mcp-outlook-lite

Lightweight MCP server that enables AI agents to manage Microsoft Outlook email, calendar, and files using PKCE authentication with only a Client ID.

→ w21180239/mcp-outlook-lite· listed on glama

Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.

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Who stands behind it

w21180239

Source: Glama

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Install from

Glamanot scored here

The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.

// key findings
🚨
Known vulnerabilities in dependencies: 1 critical, 2 high
Affects packages this MCP installs at runtime. Upgrade or remove the affected dependency.
// tools this server exposes46 tools

These names and descriptions are the publisher's own, read from the source code. We print them as written. Our assessment is the findings above, not this list.

outlook_list_emails
outlook_send_email
outlook_get_email
outlook_search_emails
outlook_create_draft
outlook_reply_to_email
outlook_reply_all
outlook_forward_email
outlook_delete_email
outlook_move_email
outlook_mark_as_read
outlook_flag_email
outlook_categorize_email
outlook_archive_email
outlook_batch_process_emails
outlook_list_events
outlook_create_event
outlook_get_event
outlook_update_event
outlook_delete_event
outlook_respond_to_invite
outlook_validate_event_datetimes
outlook_create_recurring_event
outlook_find_meeting_times
outlook_check_availability
outlook_schedule_online_meeting
outlook_list_calendars
outlook_get_calendar_view
outlook_get_busy_times
outlook_build_recurrence_pattern
outlook_create_recurrence_helper
outlook_check_calendar_permissions
outlook_list_folders
outlook_create_folder
outlook_rename_folder
outlook_get_folder_stats
outlook_list_rules
outlook_create_rule
outlook_delete_rule
outlook_list_attachments
outlook_download_attachment
outlook_add_attachment
outlook_scan_attachments
outlook_get_sharepoint_file
outlook_list_sharepoint_files
outlook_resolve_sharepoint_link
// known CVEs in dependencies1 critical2 high

Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.

criticalvitest@3.2.4GHSA-5xrq-8626-4rwp

When Vitest UI server is listening, arbitrary file can be read and executed

highxlsx@0.18.5GHSA-4r6h-8v6p-xvw6

Prototype Pollution in sheetJS

highxlsx@0.18.5GHSA-5pgg-2g8v-p4x9

SheetJS Regular Expression Denial of Service (ReDoS)

Depend on this server? Get alerted when its CVEs change.Watch this server free →
// environment variables
To run this server yourself, you supply these values. They go in your own MCP client configuration and stay on your machine. The secret label means the value is sensitive, not that the server mishandles it.
configAZURE_CLIENT_IDe =your-client-id \
configAZURE_TENANT_IDe =consumers \
configDISPLAY
configDOCKER_CONTAINER
configMCP_OUTLOOK_DEVICE_CODENo Set to 1 to force device code flow
configMCP_OUTLOOK_REDIRECT_URI
configMCP_OUTLOOK_WORK_DIRNo Directory for large file downloads
configSSH_CLIENT
configSSH_CONNECTION
configSSH_TTY
configWAYLAND_DISPLAY
configcontainerSSH / : device code printed to stderr — follow the link
// quality suggestions

Tool annotations

No tools have read-only/destructive annotations

Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.

All four hints declared on every tool

46/46 tools missing one or more hints — outlook_list_emails (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); outlook_send_email (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); outlook_get_email (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +43 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.

For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.

Tool test coverage

25/46 tools referenced in tests (54%)

Write tests that reference each tool by name so every tool has at least one test.

Production dependencies are patched

0 critical, 2 high severity in production deps — xlsx@0.18.5 (high), xlsx@0.18.5 (high)

Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.

Dev dependencies

1 critical/high in dev-only deps (does not ship to users)

Upgrade dev dependencies when convenient.

Claim the listing to review these findings one by one and send us a correction where you disagree, straight to the team. Claiming also means we tell you when the grade moves, and reach you first if we find anything urgent.

// full audit trail
The findings above are the summary. The full trail, every check we ran, each deduction, the network hosts observed and the dependency advisories, goes to verified publishers, along with an alert whenever a new one lands. Verified publishers can also review each finding and dispute it in one click. Publisher corrections have sharpened several of our checks this month, because the maintainer knows the codebase better than any scanner.
// improvement guidance — verified publishers only
We have 5 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.
// embed badge in your README
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commit: 749db2b0e321ebade24f560cd752ad973ba1ed80
code hash: d07fe5622076dff9c25d7bdb9ce150a37b6cb59e0c29764385a0a7ddc22bf188
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