> ## 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. # 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 /openapi.json 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: - Use `Authorization: Bearer ` for user-authenticated routes that require a Den session. - Use `x-api-key: ` for organization API-key calls. 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. Example: `curl https://api.openworklabs.com/v1/me -H "x-api-key: den_..."`. - 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 either `bearerAuth` or `denApiKey` before trying protected endpoints. version: 0.18.46 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: - bearerAuth: [] - denApiKey: [] 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: Members description: Organization member management routes. - name: Roles description: Organization custom role management routes. - name: Teams description: Organization team management routes. - name: API Keys description: Organization API key management routes. - name: Desktop Policies description: Desktop app policies applied to the organization, members, or teams. - name: LLM Providers description: Organization LLM provider catalog, configuration, and access routes. - name: Inference description: Organization inference settings. - name: Cloud description: Organization Cloud instance lifecycle and browser gateway resolution. - name: Workers description: Worker lifecycle, billing, and runtime routes. - name: Worker Runtime description: Worker runtime inspection and upgrade routes. - name: Worker Activity description: Worker heartbeat and activity reporting routes. - name: Automations description: Scheduled Automations, their runs, and desktop runner presence. - 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: Dashboards description: Shared dashboards and their access grants. - 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: >- Plain-text draft body. Write plain prose with no markdown syntax, separate paragraphs with blank lines, and do not hard-wrap prose. For threaded drafts, the server appends the quoted conversation automatically; do not include quoted history. 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. 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: - bearerAuth: [] - denApiKey: [] components: schemas: GoogleWorkspaceDraftResponse: type: object properties: ok: type: boolean const: true draftId: type: string messageId: anyOf: - type: string - type: 'null' draftUrl: anyOf: - type: string - type: 'null' 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. threadUrl: anyOf: - type: string - type: 'null' description: >- Gmail URL for the conversation thread returned by Gmail for this draft. to: type: string subject: type: string threadId: anyOf: - type: string - type: '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 details: type: array items: type: object properties: message: type: string path: type: array items: anyOf: - type: string - type: 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: bearerAuth: type: http scheme: bearer bearerFormat: session-token description: >- Session token passed as `Authorization: Bearer ` for user-authenticated Den routes. 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`. ````