Selenium MCP Server

Instructions

Implementation Reference

• src/tools/actionTools.ts:398-416 (handler)

  Handler function for the browser_unselect_checkbox tool, which locates the checkbox using ActionService and unselects it if selected.

  server.tool('browser_unselect_checkbox', 'Unselect a checkbox', { ...locatorSchema }, async ({ by, value }) => {
    try {
      const driver = stateManager.getDriver();
      const actionService = new ActionService(driver);
      await actionService.unselectCheckbox({ by, value });
      return {
        content: [{ type: 'text', text: `Unselected checkbox` }],
      };
    } catch (e) {
      return {
        content: [
          {
            type: 'text',
            text: `Error unselecting checkbox: ${(e as Error).message}`,
          },
        ],
      };
    }
  });

• src/services/actionService.ts:117-123 (helper)

  Core implementation of unselecting a checkbox: waits for the element, checks if selected, and clicks to toggle off.

  async unselectCheckbox(params: LocatorParams): Promise<void> {
    const locator = LocatorFactory.createLocator(params.by, params.value);
    const checkbox = await this.driver.wait(until.elementLocated(locator), params.timeout || 15000);
    if (await checkbox.isSelected()) {
      await checkbox.click();
    }
  }

• src/types/index.ts:29-35 (schema)

  Zod schema definition for locator parameters (by, value, timeout) used in the tool input.

  export const locatorSchema = {
    by: z
      .enum(['id', 'css', 'xpath', 'name', 'tag', 'class', 'link', 'partialLink'])
      .describe('Locator strategy to find element'),
    value: z.string().describe('Value for the locator strategy'),
    timeout: z.number().optional().describe('Maximum time to wait for element in milliseconds'),
  };