> ## Documentation Index > Fetch the complete documentation index at: https://openworklabs.com/docs/llms.txt > Use this file to discover all available pages before exploring further. > ## Agent Instructions > For agents: install the OpenWork desktop app with `brew install --cask openwork` (macOS) or from https://openworklabs.com/download. Do not run `npx openwork`; the npm package named `openwork` is a different project. > Connect an agent to OpenWork with the MCP Gateway: `claude mcp add --transport http openwork https://api.openworklabs.com/mcp/agent`. Teams sign up at https://app.openworklabs.com?mode=sign-up. > Step-by-step agent guide: https://openworklabs.com/docs/start-here/use-openwork-from-an-ai-agent.md > Connect Slack (any organization admin): https://openworklabs.com/docs/slack/connect-slack.md. OpenWork in Slack (@openwork bot) is private alpha for approved organizations. Setup guide: https://openworklabs.com/docs/slack/overview.md. Agent skill: https://openworklabs.com/.well-known/agent-skills/set-up-openwork-slack/SKILL.md. # Create a Gmail draft or threaded reply with optional workspace attachments > Creates a plain-text Gmail draft in the calling member own mailbox. Optional attachments are workspace paths, up to 10 files totaling at most 4 MiB, fulfilled outside model context by a supporting OpenWork host on direct execute_capability calls. Code Mode and other MCP hosts cannot fulfill attachments and create no draft. Set threadId for replies and forwards. Always share the returned draftUrl. ## OpenAPI ````yaml https://api.openworklabs.com/openapi.json?public=1 post /v1/capabilities/google-workspace/gmail-drafts openapi: 3.1.0 info: title: Den API description: >- OpenAPI spec for the Den control plane API. Authentication: - API keys (they start with `den_`) go in the `x-api-key` header as the raw value. Do not send them as `Authorization: Bearer`; that header only accepts Den session tokens, so an API key there returns 401. Example: `curl https://api.openworklabs.com/v1/me -H "x-api-key: den_..."`. API keys resolve to the issuing user and the organization member they were scoped to when created, so they can call ordinary user and organization routes without a separate signed-in session. - Use `Authorization: Bearer ` for user-authenticated routes that require a Den session. - Session-only flows still require a signed-in user session, including organization creation, invitation acceptance, active-organization switching, and MCP token minting. - Public routes like health and documentation do not require authentication. Swagger tip: use the security schemes in the Authorize dialog to set `denApiKey` (your API key) or `bearerAuth` (a session token) before trying protected endpoints. version: commit 7bee9d4 contact: name: OpenWork url: https://openworklabs.com email: team@openworklabs.com license: name: OpenWork Enterprise Edition License url: https://github.com/different-ai/openwork/blob/dev/ee/LICENSE servers: - url: https://api.openworklabs.com security: - denApiKey: [] - bearerAuth: [] tags: - name: System description: >- Service health, readiness, API documentation, and desktop version metadata. - name: Authentication description: >- Sign-in discovery, administrator bootstrap, OAuth provider connections, and MCP token minting. - name: OAuth description: >- OAuth 2.0 / OpenID Connect authorization-server and protected-resource metadata and dynamic client registration (RFC 8414, RFC 9728, RFC 7591), used by MCP clients. - name: SCIM description: >- SCIM 2.0 provisioning endpoints for identity providers (RFC 7644) and the organization SCIM connector management routes. - name: SSO description: Organization single sign-on connector management routes. - name: Bootstrap description: Agent-first provisional workspace setup routes. - name: Users description: Current user and membership routes. - name: Organizations description: Organization creation, context, brand assets, and install links. - name: Invitations description: Invitation preview, acceptance, creation, and cancellation routes. - name: Sandbox organizations description: Preview and join a sandbox organization with its shareable join link. - name: Members description: Organization member management routes. - name: Teams description: Organization team management routes. - name: Permissions description: >- Organization permissions: the permission catalog, Member, Admin and team permission sets, their history, and each member's effective permissions. - name: API Keys description: Organization API key management routes. - name: Desktop Policies description: Desktop app policies applied to the organization, members, or teams. - name: Agent Permissions description: What agents may do on members' computers, set for everyone and per team. - name: LLM Providers description: Organization LLM provider catalog, configuration, and access routes. - name: Inference description: Organization inference settings. - name: Inference Providers description: >- Organization inference Gateway providers, model groups, credential sets, access grants, member connections, and usage. - name: Gateway Usage Limits description: >- Estimated-cost policies, independent member calendar buckets, assignments, and audited usage-extension requests. - name: Cloud description: Organization Cloud instance lifecycle and browser gateway resolution. - name: Workers description: >- List and delete the organization's workers, including OpenWork Web instances. - name: Worker Activity description: Worker heartbeat and activity reporting routes. - name: Managed deployments description: >- OpenWork installations in an organization's own cloud account: launch approval, installer milestones and health reports. - name: Automations description: Scheduled Automations, their runs, and desktop runner presence. - name: Documents description: >- Connected Drive documents, inline editing and file-bound temporary Office sessions. - name: Workbot description: The signed-in member's single Workbot conversation. - name: Workflows description: Saved Workflows (Code Mode scripts), their versions, snapshots, and views. - name: Workflow Runs description: Durable Workflow run history. - name: Codemode Runs description: Generated Artifact views produced by Code Mode runs. - name: Apps description: >- Saved reusable apps built from Workflows and Artifact views, and their sharing. - name: Config Objects description: >- Versioned configuration objects (skills, workflows, and other plugin content). - name: Plugins description: Plugin packages, access grants, and imports. - name: Marketplaces description: Marketplaces that distribute plugins to members and teams. - name: Resources description: >- Aggregated snapshot of the resources and marketplace capabilities available to the caller. - name: Capability Sources description: >- Native provider capabilities (Google Workspace, Microsoft 365) and external MCP connections executed as the calling member. - name: Direct uploads description: Multipart uploads that stream workspace files straight to a provider. - name: Connectors description: >- Connector accounts and instances (GitHub and other sources) and their sync state. - name: GitHub description: >- GitHub App installation, repository discovery, and plugin import from GitHub. - name: Diagnostics description: Controlled egress diagnostics for self-hosted deployments. - name: Telemetry description: Telemetry event ingestion and adoption analytics. - name: Webhooks description: Signed inbound webhooks from third-party providers. - name: Admin description: Platform administration routes for allowlisted OpenWork administrators. - name: Deprecated description: Removed features that answer with 410 or an empty result for old clients. paths: /v1/capabilities/google-workspace/gmail-drafts: post: tags: - Capability Sources summary: >- Create a Gmail draft or threaded reply with optional workspace attachments description: >- Creates a plain-text Gmail draft in the calling member own mailbox. Optional attachments are workspace paths, up to 10 files totaling at most 4 MiB, fulfilled outside model context by a supporting OpenWork host on direct execute_capability calls. Code Mode and other MCP hosts cannot fulfill attachments and create no draft. Set threadId for replies and forwards. Always share the returned draftUrl. operationId: postV1CapabilitiesGoogleWorkspaceGmailDrafts requestBody: required: true content: application/json: schema: type: object properties: to: type: string minLength: 3 maxLength: 320 description: Recipient email address. cc: description: Optional comma-separated Cc email addresses. type: string minLength: 3 maxLength: 1000 bcc: description: Optional comma-separated Bcc email addresses. type: string minLength: 3 maxLength: 1000 subject: type: string minLength: 1 maxLength: 500 description: >- Draft subject line. For replies or forwards, include threadId; subjects starting with Re: or Fwd: are rejected without threadId so the draft stays on the existing conversation. body: type: string minLength: 1 maxLength: 50000 description: >- Draft body: plain prose or a safe Markdown subset (headings, **bold**, *italic* or _italic_, `code`, [text](url), bare URLs, lists (-, *, 1.) with simple indented nesting, > block quotes, pipe tables, and fenced code). Links must use http, https, or mailto. Raw HTML is displayed as text, never executed. Separate paragraphs with blank lines; single line breaks, indentation, and repeated spaces are preserved. Do not hard-wrap prose. Put the closing (e.g. Thanks,) and sender name on separate lines with a real newline, never joined on one line. For threaded drafts, the server appends the quoted conversation automatically; do not include quoted history. timeZone: description: >- User's IANA time zone (for example America/New_York). Pass the user's zone to format reply attribution like Gmail Web, including daylight saving time. When omitted, attribution keeps the original message Date header's offset, not the server's time zone. type: string minLength: 1 maxLength: 100 threadId: description: >- Gmail thread id to reply on. Required for replies and forwards; get it from the gmail-messages capability. When set, the draft is attached to that thread as a reply — keep the thread's subject (e.g. 'Re: …'). type: string minLength: 1 maxLength: 512 attachments: description: >- Optional workspace file paths, 1 to 10 files totaling at most 4 MiB. File bytes stay outside model context. Requires a direct execute_capability call from a supporting OpenWork host; Code Mode and other MCP hosts are unsupported and create no draft. Do not retry without attachments. minItems: 1 maxItems: 10 type: array items: type: string minLength: 1 required: - to - subject - body additionalProperties: false responses: '200': description: Draft created. content: application/json: schema: $ref: '#/components/schemas/GoogleWorkspaceDraftResponse' '400': description: The draft request was invalid. content: application/json: schema: anyOf: - $ref: '#/components/schemas/InvalidRequestError' - $ref: '#/components/schemas/GoogleWorkspaceMissingThreadIdError' '401': description: The caller must be signed in. content: application/json: schema: $ref: '#/components/schemas/UnauthorizedError' '409': description: >- The calling member has not connected their Google account or is missing permission. content: application/json: schema: $ref: '#/components/schemas/GoogleWorkspaceNeedsConnectionError' '422': description: >- Workspace attachments require a supporting OpenWork host; no draft was created. content: application/json: schema: type: object properties: ok: type: boolean const: false error: type: string const: file_input_requires_host created: type: boolean const: false message: type: string const: >- Workspace attachments require a supporting OpenWork host. No draft was created. In the OpenWork desktop app, use the openwork_gmail_draft tool instead; otherwise do not retry without attachments. required: - ok - error - created - message additionalProperties: false '502': description: Google rejected the request. content: application/json: schema: $ref: '#/components/schemas/GoogleWorkspaceUpstreamError' security: - denApiKey: [] - bearerAuth: [] components: schemas: GoogleWorkspaceDraftResponse: type: object properties: ok: type: boolean const: true draftId: type: string messageId: type: - string - 'null' draftUrl: description: >- Gmail URL for the ready-to-send draft. Always share draftUrl with the user so they can open the draft in Gmail for review and send. type: - string - 'null' threadUrl: description: >- Gmail URL for the conversation thread returned by Gmail for this draft. type: - string - 'null' to: type: string subject: type: string threadId: type: - string - 'null' quotedHistoryIncluded: type: boolean description: >- True when quoted conversation history was included by the server or already present in the request body. attachments: type: array items: type: object properties: filename: type: string mimeType: type: string size: type: integer minimum: 0 maximum: 9007199254740991 required: - filename - mimeType - size required: - ok - draftId - messageId - draftUrl - threadUrl - to - subject - threadId - quotedHistoryIncluded InvalidRequestError: type: object properties: error: type: string const: invalid_request message: type: string details: type: array items: type: object properties: message: type: string path: type: array items: type: - string - number required: - message additionalProperties: {} capability: type: string required: - error - details GoogleWorkspaceMissingThreadIdError: type: object properties: error: type: string const: missing_thread_id message: type: string required: - error - message UnauthorizedError: type: object properties: error: type: string const: unauthorized required: - error GoogleWorkspaceNeedsConnectionError: type: object properties: error: type: string const: needs_connection message: type: string required: - error - message GoogleWorkspaceUpstreamError: type: object properties: error: type: string const: google_api_error message: type: string required: - error - message securitySchemes: denApiKey: type: apiKey in: header name: x-api-key description: >- Organization API key passed as the `x-api-key` header. The raw key is the header value; do not prefix it with `Bearer`. bearerAuth: type: http scheme: bearer bearerFormat: session-token description: >- Den session token passed as `Authorization: Bearer ` for user-authenticated Den routes. Not for API keys: send `den_` keys in the `x-api-key` header instead. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.