Google Workspace

Production-ready Google Workspace MCP package with:

• Gmail MCP: send/read/search emails, attachment handling, label management, batch operations.
• Google Calendar MCP: events, availability, create/update/delete operations.
• Google Drive MCP: files/folders CRUD, uploads/downloads/exports, sharing permissions, Shared Drives operations.
• Google Sheets MCP: spreadsheet metadata, values reads/writes, and raw batch updates.
• Google Docs MCP: document fetch/create flows plus convenience text mutations and raw batch updates.
• Google Tasks MCP: task lists, tasks, completion, movement, and deletion.
• Google People MCP: personal contacts and contact groups.
• Google Forms MCP: forms CRUD, publish settings, and response reads.
• Google Slides MCP: presentations, slide pages, thumbnails, text replacement, and raw batch updates.
• MCP Apps Dashboard: workspace dashboard app-layer tools/resources with interactive UI.
• Optional Google Keep MCP, Google Chat MCP, Google Meet MCP, and Gemini media integrations behind feature flags.
• FastMCP advanced features: Context logging, progress updates, user elicitation, sampling, resources, and prompts.
• Composed server architecture: Gmail + Calendar + Drive + Sheets + Docs + Tasks + People + Forms + Slides mounted by default, with optional Apps/Keep/Chat/Meet/Gemini namespaces.

Requirements

• Python 3.12+
• UV package manager
• Node.js 18+ and npm (required for MCP Apps UI in src/mcp_google_workspace/apps/ui)
• Google Cloud OAuth desktop credentials (credentials.json)
• Google APIs enabled in your Google Cloud project: Gmail, Calendar, Drive, Sheets, Docs, Tasks, People, Forms, and Slides
• Optional APIs when enabling feature-flagged integrations: Google Keep, Google Chat, and Google Meet
• Gemini Developer API key when enabling Gemini media tools

Installation

uv sync --all-extras --dev

If you are working on MCP Apps UI, install frontend dependencies and build the bundle:

cd src/mcp_google_workspace/apps/ui
npm ci
npm run build

OAuth setup

Place the Google OAuth client credentials.json in one of:

• project root: ./credentials.json
• package credentials folder: ./src/credentials/credentials.json

Configure a versioned Fernet key ring before first use. Production deployments should mount a secret-manager document through MCP_SECRET_FILE; MCP_TOKEN_ENCRYPTION_KEY remains a single-key development option. The MCP encrypts each user's refresh token separately and never writes a shared token.json.

Generate a key once and store it in your secret manager:

python -c "from cryptography.fernet import Fernet; print(Fernet.generate_key().decode())"

Mounted secret document:

{
  "active_token_encryption_key_id": "2026-07",
  "token_encryption_keys": {
    "2026-07": "<active Fernet key>",
    "2026-04": "<retained previous Fernet key>"
  }
}

Reads accept retained keys and rewrite ciphertext with the active key. Remove an old key only after a rotation/restore drill confirms all durable records have been rewritten.

Optional service feature flags

Sheets, Docs, Tasks, People, Forms, and Slides are mounted by default and their scopes are always requested. When scopes change, reconnect the affected user so their encrypted per-user token receives the expanded grant.

Google Keep OAuth scope can return invalid_scope in standard user OAuth flows. Keep integration is therefore disabled by default.

Enable Keep when your Google Workspace setup supports it:

$env:ENABLE_KEEP="true"

Google Chat OAuth scopes also commonly require Google Workspace accounts. Chat integration is therefore disabled by default.

Enable Chat when your Google Workspace setup supports it:

$env:ENABLE_CHAT="true"

Google Meet integration is also disabled by default. Enable it only after enabling the Meet API for the same OAuth client:

$env:ENABLE_MEET="true"

Gemini media integration is also disabled by default. Enable it with a Gemini Developer API key:

$env:ENABLE_GEMINI="true"
$env:GEMINI_API_KEY="your-api-key"

Capability-specific Gemini model defaults:

$env:GEMINI_IMAGE_GENERATE_MODEL="gemini-3.1-flash-image-preview"
$env:GEMINI_IMAGE_EDIT_MODEL="gemini-3.1-flash-image-preview"
$env:GEMINI_VIDEO_UNDERSTANDING_MODEL="gemini-3-flash-preview"
$env:GEMINI_AUDIO_UNDERSTANDING_MODEL="gemini-3-flash-preview"
$env:GEMINI_REASONING_MODEL="gemini-3.1-pro-preview"

Whenever you enable an optional integration or otherwise change scopes, reconnect each affected user.

Apps dashboard rollout flag

The MCP app-layer dashboard namespace is opt-in for controlled rollout.

Enable apps namespace:

$env:ENABLE_APPS_DASHBOARD="true"

Run (STDIO)

uv run python -m mcp_google_workspace

MCP Bundle (MCPB)

This repository now includes a native uv-based MCP Bundle manifest and packaging assets.

Install on Claude Desktop:

1. Download the latest .mcpb from GitHub Releases.
2. In Claude Desktop, open the MCP bundle install flow.
3. Select the downloaded mcp-google-workspace-*.mcpb file.
4. Choose the credentials directory that contains credentials.json, or leave it empty to use the repo defaults.
5. Enable optional integrations only if your Google Workspace account and OAuth client support their scopes.
6. Finish the install and authenticate in the browser on first launch.

Gemini media tools are API-key-based rather than OAuth-based. If you enable Gemini in the bundle UI, also set the Gemini API key and optional model defaults there.

Build a local .mcpb archive only if you are developing or testing bundle changes:

uv run python scripts/build_mcpb.py

Note: Claude Desktop currently rejects extra server metadata keys such as package_manager, python_version, and working_dir, so this bundle keeps the uv server block to the manifest fields Claude accepts.

Bundle-specific documentation, runtime settings, and validation steps live in docs/MCPB.md.

Run (Streamable HTTP)

The remote server uses session-aware MCP Streamable HTTP and requires an OIDC bearer-token issuer. Session mode enables progress, cancellation, and tools/list_changed notifications; durable long-running work remains Redis-backed. The server refuses to start without this configuration:

$env:MCP_HOST="0.0.0.0"
$env:MCP_PORT="8000"
$env:MCP_HTTP_BASE_URL="https://mcp.example.com"
$env:MCP_HTTP_JWT_ISSUER="https://issuer.example.com"
$env:MCP_HTTP_JWT_AUDIENCE="google-workspace-mcp"
$env:MCP_HTTP_JWKS_URI="https://issuer.example.com/.well-known/jwks.json"
$env:MCP_GOOGLE_OAUTH_REDIRECT_URL="https://mcp.example.com/google/oauth/callback"
$env:MCP_USER_TOKEN_DIR="/srv/mcp-google-workspace/tokens"
$env:MCP_SECRET_FILE="/run/secrets/mcp-google-workspace.json"
uv run python -m mcp_google_workspace.server_http

Clients connect with an OIDC bearer JWT. FastMCP validates its issuer, audience, signature, and expiry; the verified iss + sub selects an isolated encrypted Google token. Each user calls connect_google_workspace, opens its returned URL, completes Google consent, and calls refresh_workspace_catalog. The callback is PKCE-protected and one-time; it cannot connect Google credentials to a different MCP principal.

Notable MCP tools

Gmail (namespaced as gmail_* in composed server):

• send_email
• search_emails (compact metadata-first inbox listing and Gmail query surface)
• read_emails (consistent one-to-100 message hydration with selectable detail level)
• get_mail_digest, check_mail_updates (curated triage and cursor-based incremental heartbeat)
• list_labels, create_label, update_label, delete_label, apply_labels
• list_attachments, download_attachment
• mark_as_read, mark_as_unread, move_email, delete_email
• untrash_email, mark_as_spam, mark_as_not_spam
• batch_modify, batch_delete
• list_filters, create_filter, delete_filter
• Drafts: list_drafts, get_draft, create_draft, update_draft, delete_draft, send_draft
• Threads: list_threads, get_thread (clean latest message by default), modify_thread, trash_thread, untrash_thread, delete_thread
• Forwarding addresses: list_forwarding_addresses, get_forwarding_address, create_forwarding_address, delete_forwarding_address
• Vacation settings: get_vacation_settings, update_vacation_settings

Calendar (namespaced as calendar_*):

• search_events, read_events, get_calendar_digest, list_calendars, get_calendar_context
• check_time_availability, create_event, update_event, respond_to_event, delete_event
• Smart scheduling: find_common_free_slots
• Event attachments: metadata is included by read_events; mutations use add_event_attachment, remove_event_attachment, download_event_attachment
• Event styling + conferencing fields on create/update: color_id, visibility, transparency, conference_data
• Conflict prevention: create/update run overlap checks and return status: "CONFLICT" when the slot is unavailable; updates exclude the event being moved
• Retry safety: pass a stable idempotency_key to create_event; the App does this automatically and Google Calendar stores a deterministic event ID

Calendar availability tools

Use the availability tool that matches the scheduling intent:

• check_time_availability: verify a proposed timeMin/timeMax interval for one or more calendar IDs. Use this when the exact time is already known.
• find_common_free_slots: discover candidate intervals across participants inside a broader search window. Use this when the exact meeting time is not known yet.

Calendar smart scheduling (find_common_free_slots)

find_common_free_slots returns candidate meeting slots (not raw FreeBusy output) for all participants in a time window.

Inputs:

• participants: list of calendar IDs/emails
• time_min, time_max: RFC3339 window
• slot_duration_minutes: desired meeting duration
• granularity_minutes: candidate step size
• max_results: result cap
• time_zone: optional timezone used in FreeBusy query
• working_hours_start, working_hours_end: optional daily working-hours filter (HH:MM, 24h)

participants must be sent as a native JSON array, for example ["primary", "[email protected]"]. Use the canonical slot_duration_minutes field.

Working-hours defaults:

• working_hours_start: 08:00
• working_hours_end: 17:00

Drive (namespaced as drive_*):

• Files/content: list_files, get_file, create_folder, create_file_metadata, upload_file
• File mutations: update_file_metadata, update_file_content, move_file, copy_file, delete_file
• Content retrieval: download_file, export_google_file, get_file_content_capabilities
• Sharing: list_permissions, get_permission, create_permission, update_permission, delete_permission
• Shared Drives: list_drives, get_drive, hide_drive, unhide_drive
• Progress reporting: upload_file, update_file_content, download_file, and export_google_file emit MCP progress updates
• Use Drive for file discovery when you need Docs, Sheets, Slides, or Forms file IDs by MIME type or name

Sheets (namespaced as sheets_*):

• get_spreadsheet, create_spreadsheet
• Values: get_sheet_values, batch_get_sheet_values, append_sheet_values, update_sheet_values
• Raw request escape hatch: batch_update_spreadsheet

Docs (namespaced as docs_*):

• get_document, create_document
• Convenience text mutations: append_document_text, replace_document_text
• Raw request escape hatch: batch_update_document

Tasks (namespaced as tasks_*):

• Task lists: list_tasklists, get_tasklist, create_tasklist
• Tasks: list_tasks, get_task, create_task, update_task, complete_task, move_task, delete_task

People (namespaced as people_*):

• Contacts: list_contacts, search_contacts, get_contact, create_contact, update_contact, delete_contact
• Contact groups: list_contact_groups, create_contact_group, modify_contact_group_members
• Scope note: v1 is personal contacts only; Workspace directory lookup is intentionally excluded

Forms (namespaced as forms_*):

• get_form, create_form, batch_update_form
• Publishing: set_form_publish_settings
• Responses: list_form_responses, get_form_response

Slides (namespaced as slides_*):

• get_presentation, create_presentation
• Slide reads: get_slide_page, get_slide_thumbnail
• Text mutation and raw request escape hatch: replace_text_in_presentation, batch_update_presentation

Apps (namespaced as apps_*, mounted when ENABLE_APPS_DASHBOARD=true):

• State/navigation: get_state, set_state, patch_state, today, next_range, prev_range
• Dashboard: get_dashboard
• Weekly calendar layout: get_weekly_calendar_view (Google Calendar-like week columns)
• Detail views: get_event_detail, get_email_detail, get_email_attachment
• Calendar mutations are provided only by the core calendar_* tools; the App namespace contains view/state tools only.

Keep (namespaced as keep_*):

• create_note, get_note, list_notes, delete_note
• share_note, unshare_note
• summarize_note (sampling-powered)
• compatibility stubs for unsupported Keep v1 operations:
  • update_note
  • archive_note, unarchive_note
  • list_keep_labels, create_keep_label, delete_keep_label
  • checklist mutation helpers

Note: Keep tools/resources are mounted only when ENABLE_KEEP=true.

Chat (namespaced as chat_*):

• list_spaces, get_space
• list_messages, get_message
• create_message, update_message, delete_message
• summarize_space_messages (sampling-powered)

Note: Chat tools/resources are mounted only when ENABLE_CHAT=true.

Meet (namespaced as meet_*, mounted when ENABLE_MEET=true):

• Spaces: create_space, get_space, update_space, end_active_conference
• Conference records: list_conference_records, get_conference_record

Gemini (namespaced as gemini_*, mounted when ENABLE_GEMINI=true):

• generate_image, edit_image
• describe_video, analyze_audio
• local filesystem or Drive file ID inputs for media tools
• generated images are written locally under GEMINI_OUTPUT_DIR
• Artifacts and attendance metadata: list_conference_participants, list_conference_recordings, list_conference_transcripts
• v1 scope boundary: metadata only; transcript or recording file downloads still belong in Drive if added later

MCP Resources and Prompts

Gmail resources:

• gmail://inbox/summary
• gmail://labels
• gmail://email/{message_id}

Calendar resources:

• calendar://today
• calendar://week

Drive resources:

• drive://recent
• drive://shared-drives
• drive://file/{file_id}

Keep resources:

• keep://notes/recent
• keep://note/{note_id}

Chat resources:

• chat://spaces
• chat://space/{space_id}/messages
• chat://space/{space_id}/members
• chat://users/{user_ref}
• chat://users/me

Apps resources (mounted when ENABLE_APPS_DASHBOARD=true):

• apps://dashboard/current
• apps://dashboard/day/{ymd}
• apps://dashboard/week/{ymd}
• apps://calendar/week/{ymd}

Prompts:

• compose_email_prompt
• reply_email_prompt
• summarize_inbox_prompt
• summarize_keep_note_prompt
• extract_actions_from_keep_notes_prompt
• draft_chat_announcement_prompt
• summarize_chat_thread_prompt

Production operations

The remote runtime exposes unauthenticated minimal operational endpoints:

• /health/live — event-loop/process liveness
• /health/ready — draining, encryption, token storage, Redis, S3, and multi-worker dependency readiness
• /version — package/build/MCP protocol versions without secrets
• /metrics — Prometheus/OpenTelemetry-compatible low-cardinality metrics

Admission control is principal- and tool-cost-aware:

Variable	Default	Purpose
MCP_RATE_LIMIT_PER_MINUTE	120	Per-principal request rate
MCP_GLOBAL_CONCURRENCY	64	Server-wide active tool calls
MCP_PRINCIPAL_CONCURRENCY	8	Active calls per principal
MCP_EXPENSIVE_CONCURRENCY	4	Gemini/download/export/batch calls
MCP_TOOL_DEADLINE_SECONDS	120	Standard end-to-end deadline
MCP_EXPENSIVE_DEADLINE_SECONDS	600	Expensive-tool deadline
MCP_SHUTDOWN_GRACE_SECONDS	30	In-flight drain interval

Google provider calls have a failure-window circuit breaker and expose logical-call versus HTTP-attempt metrics so retries are measurable. Logs include hashed principals and correlation IDs, never tokens, message bodies, prompts, filenames, or recipient lists.

For more than one HTTP process/replica, set MCP_WORKERS, MCP_REDIS_URL, MCP_UPLOAD_S3_BUCKET, and configure load-balancer affinity on Mcp-Session-Id; set MCP_SESSION_AFFINITY=true only after that routing is active. Readiness fails when this distributed contract is incomplete. The HTTP entrypoint uses MCP_REDIS_URL as FASTMCP_DOCKET_URL when the latter is not set. FastMCP native task-enabled tools use the standard MCP task protocol for operation IDs, progress polling, cancellation, expiry, and partial/error results. Additional workers can run with uv run fastmcp tasks worker src/mcp_google_workspace/server.py:workspace_mcp using the same FASTMCP_DOCKET_URL and queue name.

High-impact reversible writes use prepare_workspace_action and commit_workspace_action. The encrypted one-time token is principal-bound, argument-bound, expires after five minutes, and returns an impact preview before commit. Stable resource handles (gdrive:///..., gmail-message:///..., and related schemes) are included where applicable and can be refreshed through resolve_workspace_resource.

Emergency principal invalidation accepts hashed principal storage keys through MCP_REVOKED_PRINCIPALS or the Redis set mcp:revoked_principals. Redis-backed validation fails closed if revocation state cannot be checked.

MCP Client-Dependent Features

These features depend on active MCP client support and may be silently unavailable in clients that do not implement the corresponding MCP capabilities.

MCP Apps File Picker

The composed server always exposes files_file_manager, a Prefab/FastMCP MCP App with drag-and-drop and native file selection. It is intended for hosted clients such as Claude where a server-local path is not useful and sending binary data through the model context is wasteful.

Typical flow:

1. Call files_file_manager and let the user choose one or more files (up to 25 MiB each).
2. Use the opaque upl_... handle returned by the picker as uploaded_file in a Workspace tool. display_name is presentation-only.
3. The integration reads the bytes directly from scoped server storage; the binary payload does not pass through the model context.

uploaded_file is supported by:

• Gmail send_email, create_draft, and update_draft attachments
• Drive upload_file and update_file_content
• Gemini edit_image, describe_video, and analyze_audio

Local/stdio uploads are session-scoped in memory. A single remote instance can use encrypted filesystem objects plus SQLite metadata through MCP_UPLOAD_DB. Multi-worker production uses Redis metadata and S3-compatible encrypted object storage by configuring MCP_REDIS_URL and MCP_UPLOAD_S3_BUCKET (plus optional MCP_UPLOAD_S3_ENDPOINT and MCP_UPLOAD_S3_PREFIX). Remote files use opaque handles, expire after one hour, and have a 250 MiB per-principal aggregate quota by default. Configure MCP_UPLOAD_TTL_SECONDS and MCP_UPLOAD_QUOTA_BYTES as needed. Uploads are MIME-sniffed, archive expansion is bounded, checksums are verified, and MCP_REQUIRE_MALWARE_SCAN=true enforces ClamAV through MCP_CLAMAV_HOST/MCP_CLAMAV_PORT. Raw host paths are absent from the remote catalog and rejected at runtime.

Use files_delete_file to remove an upload before its TTL expires.

Requires: an MCP client with MCP Apps/iframe rendering support. Clients without Apps support can still use Google Drive file IDs or trusted local/stdio paths.

Progressive Remote Tool Discovery

The authenticated Streamable HTTP entrypoint reduces the model-visible catalog to workflow/discovery entry points, hides namespaces whose OAuth capability is not granted, and removes host-filesystem-only tools and parameters. Use search_tools to discover a capability and call_tool to invoke the selected tool. refresh_workspace_catalog sends tools/list_changed after incremental consent.

get_workspace_capabilities reports enabled namespaces, OAuth capability names, and supported file-input strategies. search_workspace searches Drive files, contacts, and Gmail message IDs concurrently and returns normalized references.

Incremental Google Consent

connect_google_workspace accepts a capabilities list such as ["drive"], ["gmail", "calendar"], or ["people"]. When omitted it requests Gmail only. Tools build clients with service-specific scopes and return an actionable reconnect error when that capability has not yet been granted. get_google_connection_status accepts an optional capability to verify one grant and reports all currently granted capabilities. Disconnect attempts to revoke the Google grant before deleting encrypted local credentials.

Response and Error Contracts

All model-visible tools publish recursively bounded, documented input schemas and closed documented object output schemas. Open input objects are limited to an audited set of genuine Google polymorphic batch maps. List/search responses expose their documented pagination and result-count fields without relying on undeclared conventions. Uncaught tool failures use a machine-readable envelope with code, message, retryable, retry_after, executable required_action, provider_status, and field_errors.

Drive, Calendar, and Gemini Drive-media downloads stream through bounded temporary files instead of buffering complete files in memory. MCP_MAX_DOWNLOAD_BYTES controls the per-download ceiling (default 250 MiB, maximum 10 GiB). Setting MCP_REDIS_URL makes prepare/commit records cross-replica and atomic.

MCP Apps (UI Dashboard)

When ENABLE_APPS_DASHBOARD=true, the apps_get_dashboard and apps_get_weekly_calendar_view tools carry an _meta.ui.resourceUri annotation pointing to ui://apps/dashboard-ui. MCP clients that support the Apps rendering protocol (e.g. Claude Desktop) will embed an interactive workspace dashboard UI alongside the tool response.

The UI is a TypeScript web component that communicates with the server via PostMessage. It renders:

• A weekly calendar view (all-day events + timed event columns)
• An inbox summary with email detail drill-down
• Scheduling action buttons (RSVP, reschedule, cancel)

Session-scoped state (current view, anchor date, selected calendars, inbox query) is stored server-side per session and managed through apps_get_state / apps_set_state / apps_patch_state.

Requires: MCP client with App/iframe rendering support.

Progress Notifications

Long-running tools emit incremental notifications/progress messages via ctx.report_progress(current, total, description). Clients that handle progress notifications can display progress bars or status messages during API-heavy operations.

Tools that emit progress:

Namespace	Tools
Drive	upload_file, update_file_content, download_file, export_google_file
Apps	get_dashboard, get_weekly_calendar_view, get_event_detail, get_email_detail, get_email_attachment
Chat	list_spaces, list_messages

Requires: MCP client that handles notifications/progress.

Sampling

Optional tools use MCP sampling (ctx.sample()) to generate LLM-powered summaries within the tool response, using the host client's configured model for inference.

Sampling-powered tools:

• keep_summarize_note — summarizes a Keep note
• chat_summarize_space_messages — summarizes recent messages in a Chat space

Requires: MCP client with sampling/createMessage support (e.g. Claude Desktop). Without sampling support these tools will fail or return an empty summary.

Tool Input Contract

The published JSON Schema is the runtime contract. Send a native JSON object using the documented field names and native arrays/objects. Unknown keys, camelCase aliases, JSON-stringified objects, comma-delimited arrays, and legacy parameter aliases are rejected rather than silently coerced.

Google Keep API limitations

Google Keep API v1 currently exposes create, get, list, and delete for notes, plus permission batch create/delete. It does not expose a direct update/patch endpoint, archive/unarchive endpoints, or dedicated label endpoints in v1. The MCP server returns explicit unsupported responses for those operations.

Marketplace packaging

This repo includes:

• .claude-plugin/marketplace.json
• .claude-plugin/plugin.json

and a compatibility manifest at:

• plugins/google-workspace/.claude-plugin/plugin.json

Reference docs:

• Create and distribute a plugin marketplace
• Discover and install prebuilt plugins

Install with Claude Code marketplace

From within Claude Code:

/plugin marketplace add guinacio/mcp-google-workspace
/plugin install google-workspace@google-workspace-mcp

Local checkout flow (from this repository root):

/plugin marketplace add .
/plugin install google-workspace@google-workspace-mcp

Optional refresh after updates:

/plugin marketplace update google-workspace-mcp

Claude Desktop JSON (mcpServers)

If you want to run it directly in Claude Desktop without marketplace install, add this to your Claude Desktop config JSON under mcpServers.

Windows config file:

• %APPDATA%\Claude\claude_desktop_config.json

macOS config file:

• ~/Library/Application Support/Claude/claude_desktop_config.json

Linux config file:

• ~/.config/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "google-workspace": {
      "command": "uv",
      "args": [
        "run",
        "--directory",
        "c:/path/to/mcp-google-workspace",
        "python",
        "-m",
        "mcp_google_workspace"
      ],
      "env": {
        "ENABLE_APPS_DASHBOARD": "true",
        "ENABLE_KEEP": "false",
        "ENABLE_CHAT": "false",
        "ENABLE_MEET": "false"
      }
    }
  }
}

Replace c:/path/to/mcp-google-workspace with your local repo path.

Tests

uv run pytest -q

Apps smoke test:

# in-process mode (auto-enables apps namespace)
uv run python scripts/qa_apps_smoke.py

# or against a running Streamable HTTP server
uv run python scripts/qa_apps_smoke.py --http-url http://127.0.0.1:8001/mcp

Existing calendar project reference

• guinacio/mcp-google-calendar