create_send_as
Create a custom send-as email alias for your Gmail account to personalize the 'From:' header and manage professional identities with optional display name, reply-to address, and HTML signature.
Instructions
Creates a custom send-as alias
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| displayName | No | A name that appears in the 'From:' header | |
| isPrimary | No | Whether this address is the primary address | |
| replyToAddress | No | An optional email address that is included in a 'Reply-To:' header | |
| sendAsEmail | Yes | The email address that appears in the 'From:' header | |
| signature | No | An optional HTML signature | |
| treatAsAlias | No | Whether Gmail should treat this address as an alias |
Implementation Reference
- src/index.ts:1127-1143 (registration)Registration of the 'create_send_as' MCP tool, including inline schema definition and handler function that creates a custom send-as alias using the Gmail API.server.tool("create_send_as", "Creates a custom send-as alias", { sendAsEmail: z.string().describe("The email address that appears in the 'From:' header"), displayName: z.string().optional().describe("A name that appears in the 'From:' header"), replyToAddress: z.string().optional().describe("An optional email address that is included in a 'Reply-To:' header"), signature: z.string().optional().describe("An optional HTML signature"), isPrimary: z.boolean().optional().describe("Whether this address is the primary address"), treatAsAlias: z.boolean().optional().describe("Whether Gmail should treat this address as an alias") }, async (params) => { return handleTool(config, async (gmail: gmail_v1.Gmail) => { const { data } = await gmail.users.settings.sendAs.create({ userId: 'me', requestBody: params }) return formatResponse(data) }) } )
- src/index.ts:1137-1142 (handler)Handler function for 'create_send_as' tool. Uses handleTool wrapper to authenticate, then calls Gmail API to create a send-as alias with the provided parameters.async (params) => { return handleTool(config, async (gmail: gmail_v1.Gmail) => { const { data } = await gmail.users.settings.sendAs.create({ userId: 'me', requestBody: params }) return formatResponse(data) }) }
- src/index.ts:1129-1136 (schema)Zod schema defining the input parameters for the 'create_send_as' tool, including sendAsEmail (required), and optional fields like displayName, replyToAddress, signature, isPrimary, treatAsAlias.{ sendAsEmail: z.string().describe("The email address that appears in the 'From:' header"), displayName: z.string().optional().describe("A name that appears in the 'From:' header"), replyToAddress: z.string().optional().describe("An optional email address that is included in a 'Reply-To:' header"), signature: z.string().optional().describe("An optional HTML signature"), isPrimary: z.boolean().optional().describe("Whether this address is the primary address"), treatAsAlias: z.boolean().optional().describe("Whether Gmail should treat this address as an alias") },
- src/index.ts:50-80 (helper)Shared helper function 'handleTool' used by 'create_send_as' and other tools to handle OAuth2 authentication, credential validation, Gmail client creation, API call execution, and error handling (especially auth errors).const handleTool = async (queryConfig: Record<string, any> | undefined, apiCall: (gmail: gmail_v1.Gmail) => Promise<any>) => { try { const oauth2Client = queryConfig ? createOAuth2Client(queryConfig) : defaultOAuth2Client if (!oauth2Client) throw new Error('OAuth2 client could not be created, please check your credentials') const credentialsAreValid = await validateCredentials(oauth2Client) if (!credentialsAreValid) throw new Error('OAuth2 credentials are invalid, please re-authenticate') const gmailClient = queryConfig ? google.gmail({ version: 'v1', auth: oauth2Client }) : defaultGmailClient if (!gmailClient) throw new Error('Gmail client could not be created, please check your credentials') const result = await apiCall(gmailClient) return result } catch (error: any) { // Check for specific authentication errors if ( error.message?.includes("invalid_grant") || error.message?.includes("refresh_token") || error.message?.includes("invalid_client") || error.message?.includes("unauthorized_client") || error.code === 401 || error.code === 403 ) { return formatResponse({ error: `Authentication failed: ${error.message}. Please re-authenticate by running: npx @shinzolabs/gmail-mcp auth`, }); } return formatResponse({ error: `Tool execution failed: ${error.message}` }); } }
- src/index.ts:48-49 (helper)Helper function 'formatResponse' used to standardize tool responses by wrapping them in MCP content format with JSON stringified data.const formatResponse = (response: any) => ({ content: [{ type: "text", text: JSON.stringify(response) }] })