outlook-mcp
MCP server for Microsoft Office 365 Outlook – email, calendar & SharePoint integration for Claude, ChatGPT, and AI assistants via Microsoft Graph API
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XenoXilus
Source: github_topic · also listed on Glama
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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.
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_emailsoutlook_send_emailoutlook_get_emailoutlook_search_emailsoutlook_create_draftoutlook_reply_to_emailoutlook_reply_alloutlook_forward_emailoutlook_delete_emailoutlook_move_emailoutlook_mark_as_readoutlook_flag_emailoutlook_categorize_emailoutlook_archive_emailoutlook_batch_process_emailsoutlook_list_eventsoutlook_create_eventoutlook_get_eventoutlook_update_eventoutlook_delete_eventoutlook_respond_to_inviteoutlook_validate_event_datetimesoutlook_create_recurring_eventoutlook_find_meeting_timesoutlook_check_availabilityoutlook_schedule_online_meetingoutlook_list_calendarsoutlook_get_calendar_viewoutlook_get_busy_timesoutlook_build_recurrence_patternoutlook_create_recurrence_helperoutlook_check_calendar_permissionsoutlook_list_foldersoutlook_create_folderoutlook_rename_folderoutlook_get_folder_statsoutlook_list_attachmentsoutlook_download_attachmentoutlook_add_attachmentoutlook_scan_attachmentsoutlook_get_sharepoint_fileoutlook_list_sharepoint_filesoutlook_resolve_sharepoint_linkoutlook_save_attachmentoutlook_fetch_billing_pdfoutlook_extract_receiptoutlook_render_email_pdfoutlook_collect_receiptsDisclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
When Vitest UI server is listening, arbitrary file can be read and executed
@modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse
Anthropic's MCP TypeScript SDK has a ReDoS vulnerability
Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default
Prototype Pollution in sheetJS
AZURE_CLIENT_ID"": "your-azure-client-id",AZURE_TENANT_ID"": "your-azure-tenant-id",BILLING_DOMAIN_ALLOWLISTComma-separated hosts outlook_fetch_billing_pdf may contact (default: pay.stripe.com,invoice.stripe.com,files.stripe.com,m.stripe.network)MCP_OUTLOOK_ALLOWED_WRITE_DIRSNo Comma-separated extra directories save tools may write into when given an explicit destDir. Permission only — defaults are unchangedMCP_OUTLOOK_AUTH_MODEinteractive (default) or headless — headless never opens a browser and fails fast if silent refresh is impossibleMCP_OUTLOOK_CHROME_PATHChrome/Chromium binary for outlook_render_email_pdf (auto-detected when unset)MCP_OUTLOOK_RECEIPTS_DIRDirectory where receipt/invoice PDFs are saved (falls back to work dir). Also passable per-call as destDir.MCP_OUTLOOK_REDIRECT_URIMCP_OUTLOOK_REFRESH_TOKEN_PATHDirectory of the encrypted token store for headless runs (defaults to the built-in store)MCP_OUTLOOK_SHARED_MAILBOXNo Delegated/shared mailbox to read; empty = own mailboxMCP_OUTLOOK_WORK_DIR"": "/optional/download/directory"RECEIPT_FILENAME_TEMPLATEReceipt naming pattern (default: {vendor} {DDMmmYY} Invoice.pdf). Also passable per-vendor as filenameTemplate.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
48/48 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), +45 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.
License file
No license file
Add a LICENSE file (MIT, Apache-2.0, etc.).
Tool test coverage
25/48 tools referenced in tests (52%)
Write tests that reference each tool by name so every tool has at least one test.
Secrets not logged
1 secret value sent to console.log
Redact or omit secret values from log output.
Production dependencies are patched
0 critical, 5 high severity in production deps — @modelcontextprotocol/sdk@1.15.0 (high), @modelcontextprotocol/sdk@1.15.0 (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.
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