Selenium MCP Server

Instructions

Implementation Reference

• src/tools/actionTools.ts:418-436 (registration)

  Registration of the 'browser_submit_form' tool using server.tool, including inline handler that delegates to ActionService.submitForm and error handling.

  server.tool('browser_submit_form', 'Submit a form', { ...locatorSchema }, async ({ by, value }) => {
    try {
      const driver = stateManager.getDriver();
      const actionService = new ActionService(driver);
      await actionService.submitForm({ by, value });
      return {
        content: [{ type: 'text', text: `Submitted form` }],
      };
    } catch (e) {
      return {
        content: [
          {
            type: 'text',
            text: `Error submitting form: ${(e as Error).message}`,
          },
        ],
      };
    }
  });

• src/services/actionService.ts:91-95 (handler)

  Core handler logic in ActionService that locates the form using LocatorFactory and submits it using Selenium WebDriver's form.submit() method.

  async submitForm(params: LocatorParams): Promise<void> {
    const locator = LocatorFactory.createLocator(params.by, params.value);
    const form = await this.driver.wait(until.elementLocated(locator), params.timeout || 15000);
    await form.submit();
  }

• src/types/index.ts:29-35 (schema)

  Zod schema defining the input parameters for locators (by, value, timeout), spread into the tool's input schema.

  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'),
  };