diff --git a/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/panel/components/deploy/components/deploy-modal/components/chat/chat-field-error.test.tsx b/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/panel/components/deploy/components/deploy-modal/components/chat/chat-field-error.test.tsx
new file mode 100644
index 00000000000..039844dfa4d
--- /dev/null
+++ b/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/panel/components/deploy/components/deploy-modal/components/chat/chat-field-error.test.tsx
@@ -0,0 +1,86 @@
+import type { ComponentProps, PropsWithChildren } from 'react'
+import { JSDOM } from 'jsdom'
+import { renderToStaticMarkup } from 'react-dom/server'
+import { describe, expect, it, vi } from 'vitest'
+
+const validation = vi.hoisted(() => ({
+  current: { isChecking: false, error: 'Use lowercase letters', isValid: false } as {
+    isChecking: boolean
+    error: string | null
+    isValid: boolean
+  },
+}))
+
+vi.mock('@sim/emcn', () => ({
+  Input: (props: ComponentProps<'input'>) => <input {...props} />,
+  Label: (props: ComponentProps<'label'>) => (
+    <label htmlFor={props.htmlFor} className={props.className}>
+      {props.children}
+    </label>
+  ),
+  cn: (...values: unknown[]) => values.filter(Boolean).join(' '),
+  Tooltip: {
+    Root: ({ children }: PropsWithChildren) => <>{children}</>,
+    Trigger: ({ children }: PropsWithChildren) => <>{children}</>,
+    Content: ({ children }: PropsWithChildren) => <>{children}</>,
+  },
+}))
+vi.mock('@sim/emcn/icons', () => ({ Check: () => null, TriangleAlert: () => null }))
+vi.mock('@sim/logger', () => ({ createLogger: () => ({}) }))
+vi.mock('@/components/ui', () => ({ GeneratedPasswordInput: () => null }))
+vi.mock('@/lib/core/config/deployment-shape', () => ({ useDeploymentShape: () => ({}) }))
+vi.mock('@/lib/core/utils/urls', () => ({
+  getBaseUrl: () => 'https://sim.ai',
+  getEmailDomain: () => 'sim.ai',
+}))
+vi.mock('@/lib/messaging/email/validation', () => ({ validateAllowlistEntry: () => true }))
+vi.mock('@/lib/workflows/streaming/output-selector', () => ({
+  formatInternalOutputSelector: () => '',
+}))
+vi.mock(
+  '@/app/workspace/[workspaceId]/w/[workflowId]/components/chat/components/output-select/output-select',
+  () => ({
+    OutputSelect: () => null,
+  })
+)
+vi.mock('@/hooks/queries/chats', () => ({
+  useCreateChat: () => ({}),
+  useDeleteChat: () => ({}),
+  useRevealChatPassword: () => ({}),
+  useUpdateChat: () => ({}),
+}))
+vi.mock('@/hooks/use-permission-config', () => ({ usePermissionConfig: () => ({}) }))
+vi.mock('./hooks', () => ({ useIdentifierValidation: () => validation.current }))
+
+import { IdentifierInput } from './chat'
+
+function renderIdentifier() {
+  return new JSDOM(renderToStaticMarkup(<IdentifierInput value='bad path' onChange={vi.fn()} />))
+    .window.document
+}
+
+describe('deploy URL field error', () => {
+  it('announces and associates the URL validation error with its input', () => {
+    validation.current = { isChecking: false, error: 'Use lowercase letters', isValid: false }
+    const document = renderIdentifier()
+    const input = document.querySelector<HTMLInputElement>('#chat-url')
+    const alert = document.querySelector<HTMLElement>('[role="alert"]')
+
+    expect(alert?.textContent).toBe('Use lowercase letters')
+    expect(alert?.className).toBe('mt-[6.5px] text-[var(--text-error)] text-caption')
+    expect(input?.getAttribute('aria-invalid')).toBe('true')
+    expect(input?.getAttribute('aria-describedby')).toBe(alert?.id)
+    expect(alert?.id).toBeTruthy()
+    expect(document.querySelector('label')?.htmlFor).toBe(input?.id)
+  })
+
+  it('omits the error relationship when the URL is valid', () => {
+    validation.current = { isChecking: false, error: null, isValid: true }
+    const document = renderIdentifier()
+    const input = document.querySelector<HTMLInputElement>('#chat-url')
+
+    expect(document.querySelector('[role="alert"]')).toBeNull()
+    expect(input?.getAttribute('aria-invalid')).toBe('false')
+    expect(input?.hasAttribute('aria-describedby')).toBe(false)
+  })
+})
diff --git a/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/panel/components/deploy/components/deploy-modal/components/chat/chat.tsx b/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/panel/components/deploy/components/deploy-modal/components/chat/chat.tsx
index b9dfb3271a2..3caefaad692 100644
--- a/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/panel/components/deploy/components/deploy-modal/components/chat/chat.tsx
+++ b/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/panel/components/deploy/components/deploy-modal/components/chat/chat.tsx
@@ -1,6 +1,6 @@
 'use client'
 
-import { useEffect, useRef, useState } from 'react'
+import { type ReactNode, useEffect, useId, useRef, useState } from 'react'
 import {
   ChipButtonGroup,
   ChipButtonGroupItem,
@@ -49,6 +49,19 @@ const logger = createLogger('ChatDeploy')
 
 const IDENTIFIER_PATTERN = /^[a-z0-9-]+$/
 
+interface DeployFieldErrorProps {
+  children: ReactNode
+  id?: string
+}
+
+function DeployFieldError({ children, id }: DeployFieldErrorProps) {
+  return (
+    <p id={id} role='alert' className='mt-[6.5px] text-[var(--text-error)] text-caption'>
+      {children}
+    </p>
+  )
+}
+
 interface ChatDeployProps {
   workflowId: string
   deploymentInfo: {
@@ -382,11 +395,7 @@ export function ChatDeploy({
               className='w-full'
               disablePortal
             />
-            {errors.outputBlocks && (
-              <p className='mt-[6.5px] text-[var(--text-error)] text-caption'>
-                {errors.outputBlocks}
-              </p>
-            )}
+            {errors.outputBlocks && <DeployFieldError>{errors.outputBlocks}</DeployFieldError>}
           </div>
 
           <div className='flex items-center justify-between gap-3 px-2'>
@@ -539,7 +548,7 @@ const getDomainPrefix = (() => {
   return () => prefix
 })()
 
-function IdentifierInput({
+export function IdentifierInput({
   value,
   onChange,
   originalIdentifier,
@@ -547,6 +556,7 @@ function IdentifierInput({
   onValidationChange,
   isEditingExisting = false,
 }: IdentifierInputProps) {
+  const errorId = useId()
   const { isChecking, error, isValid } = useIdentifierValidation(
     value,
     originalIdentifier,
@@ -590,6 +600,8 @@ function IdentifierInput({
             onChange={(e) => handleChange(e.target.value)}
             required
             disabled={disabled}
+            aria-invalid={Boolean(error)}
+            aria-describedby={error ? errorId : undefined}
             className={cn(
               'rounded-none border-0 bg-transparent pl-0 shadow-none disabled:bg-transparent disabled:opacity-100',
               (isChecking || (isValid && value)) && 'pr-8'
@@ -617,7 +629,7 @@ function IdentifierInput({
           )}
         </div>
       </div>
-      {error && <p className='mt-[6.5px] text-[var(--text-error)] text-caption'>{error}</p>}
+      {error && <DeployFieldError id={errorId}>{error}</DeployFieldError>}
       <p className='mt-[6.5px] truncate text-[var(--text-secondary)] text-xs'>
         {isEditingExisting && value ? (
           <>
@@ -745,9 +757,7 @@ function AuthSelector({
             }
           />
           {canRevealPassword && revealPasswordMutation.isError && (
-            <p className='mt-[6.5px] text-[var(--text-error)] text-caption'>
-              Failed to load the current password
-            </p>
+            <DeployFieldError>Failed to load the current password</DeployFieldError>
           )}
           <p className='mt-[6.5px] text-[var(--text-secondary)] text-xs'>
             {getPasswordHelperText(hasExistingPassword)}
@@ -772,7 +782,7 @@ function AuthSelector({
         </div>
       )}
 
-      {error && <p className='mt-[6.5px] text-[var(--text-error)] text-caption'>{error}</p>}
+      {error && <DeployFieldError>{error}</DeployFieldError>}
     </div>
   )
 }