Google Tag Manager MCP Server

Instructions

Implementation Reference

• src/index.js:934-946 (handler)

  MCP tool handler for 'list_containers'. Calls GTMClient.listContainers with the accountId argument and returns the JSON-formatted result.

  case 'list_containers':
    return {
      content: [
        {
          type: 'text',
          text: JSON.stringify(
            await this.gtmClient.listContainers(args.accountId),
            null,
            2
          ),
        },
      ],
    };

• src/index.js:82-95 (registration)

  Registration of the 'list_containers' tool in the ListTools response, including name, description, and input schema.

  {
    name: 'list_containers',
    description: '指定されたアカウントのコンテナ一覧を取得します',
    inputSchema: {
      type: 'object',
      properties: {
        accountId: {
          type: 'string',
          description: 'アカウントID',
        },
      },
      required: ['accountId'],
    },
  },

• src/index.js:85-94 (schema)

  Input schema for the 'list_containers' tool defining the required accountId parameter.

  inputSchema: {
    type: 'object',
    properties: {
      accountId: {
        type: 'string',
        description: 'アカウントID',
      },
    },
    required: ['accountId'],
  },

• src/gtm-client.js:53-59 (helper)

  Core implementation of listContainers in GTMClient class, which authenticates and calls Google Tag Manager API to list containers for the given account.

  async listContainers(accountId) {
    await this.ensureAuth();
    const response = await this.tagmanager.accounts.containers.list({
      parent: `accounts/${accountId}`
    });
    return response.data.container || [];
  }