create_forwarding_address

Set up email forwarding in Gmail by specifying a destination address to automatically redirect incoming messages.

Instructions

Creates a forwarding address

Input Schema

TableJSON Schema

Name	Required	Description	Default
`forwardingEmail`	Yes	An email address to which messages can be forwarded

Implementation Reference

src/index.ts:1063-1074 (registration)

Registration of the 'create_forwarding_address' MCP tool. Includes input schema (forwardingEmail), description, and handler that calls Gmail API's users.settings.forwardingAddresses.create via the shared handleTool helper.

server.tool("create_forwarding_address",
  "Creates a forwarding address",
  {
    forwardingEmail: z.string().describe("An email address to which messages can be forwarded")
  },
  async (params) => {
    return handleTool(config, async (gmail: gmail_v1.Gmail) => {
      const { data } = await gmail.users.settings.forwardingAddresses.create({ userId: 'me', requestBody: params })
      return formatResponse(data)
    })
  }
)

src/index.ts:1068-1073 (handler)

Handler function for 'create_forwarding_address' tool. Uses shared handleTool to authenticate and execute the Gmail API call to create a new forwarding address.

async (params) => {
  return handleTool(config, async (gmail: gmail_v1.Gmail) => {
    const { data } = await gmail.users.settings.forwardingAddresses.create({ userId: 'me', requestBody: params })
    return formatResponse(data)
  })
}

src/index.ts:1065-1067 (schema)
Input schema for 'create_forwarding_address' tool using Zod: requires 'forwardingEmail' string.
```
{
  forwardingEmail: z.string().describe("An email address to which messages can be forwarded")
},
```

src/index.ts:50-66 (helper)

Shared helper function 'handleTool' used by all Gmail API tools, including 'create_forwarding_address', for OAuth2 authentication and API execution.

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) {
    return `Tool execution failed: ${error.message}`
  }
}

src/index.ts:48-49 (helper)
Shared helper 'formatResponse' used to standardize tool responses as MCP content blocks.
```
const formatResponse = (response: any) => ({ content: [{ type: "text", text: JSON.stringify(response) }] })
```

Gmail MCP Server