diff --git a/core/http/middleware/trace.go b/core/http/middleware/trace.go
index 9a3da8dea..92baf18a4 100644
--- a/core/http/middleware/trace.go
+++ b/core/http/middleware/trace.go
@@ -43,6 +43,12 @@ type APIExchange struct {
 	Error     string              `json:"error,omitempty"`
 	UserID    string              `json:"user_id,omitempty"`
 	UserName  string              `json:"user_name,omitempty"`
+	// ClientIP is the caller's address as resolved by echo (honours
+	// X-Forwarded-For / X-Real-IP behind a trusted proxy), and UserAgent
+	// is the raw User-Agent header. Both are surfaced in the admin Traces
+	// UI so an operator can tell who/what issued each request.
+	ClientIP  string `json:"client_ip,omitempty"`
+	UserAgent string `json:"user_agent,omitempty"`
 }
 
 var traceBuffer *circularbuffer.Queue[APIExchange]
@@ -221,6 +227,8 @@ func TraceMiddleware(app *application.Application) echo.MiddlewareFunc {
 			exchange := APIExchange{
 				Timestamp: startTime,
 				Duration:  time.Since(startTime),
+				ClientIP:  c.RealIP(),
+				UserAgent: c.Request().UserAgent(),
 				Request: APIExchangeRequest{
 					Method:        c.Request().Method,
 					Path:          c.Path(),
diff --git a/core/http/react-ui/e2e/traces-metadata.spec.js b/core/http/react-ui/e2e/traces-metadata.spec.js
new file mode 100644
index 000000000..9e8fdbe70
--- /dev/null
+++ b/core/http/react-ui/e2e/traces-metadata.spec.js
@@ -0,0 +1,44 @@
+import { test, expect } from './coverage-fixtures.js'
+
+// Pin the API-trace metadata surface (issues #10886 / #10887): the API
+// traces table exposes the requesting user in a dedicated column, and the
+// expanded row detail lists User, Client IP and User Agent so an operator
+// can tell who/what issued each request.
+test.describe('Traces - API request metadata', () => {
+  test.beforeEach(async ({ page }) => {
+    await page.route('**/api/traces', (route) => {
+      route.fulfill({
+        contentType: 'application/json',
+        body: JSON.stringify([
+          {
+            request: { method: 'POST', path: '/v1/chat/completions' },
+            response: { status: 200 },
+            user_id: 'user-123',
+            user_name: 'alice',
+            client_ip: '203.0.113.7',
+            user_agent: 'curl/8.4.0',
+          },
+        ]),
+      })
+    })
+    await page.route('**/api/backend-traces', (route) => {
+      route.fulfill({ contentType: 'application/json', body: '[]' })
+    })
+    await page.goto('/app/traces')
+    await expect(page.locator('text=Tracing is')).toBeVisible({ timeout: 10_000 })
+  })
+
+  test('shows the User column value in the API traces table', async ({ page }) => {
+    await expect(page.locator('th', { hasText: 'User' })).toBeVisible()
+    await expect(page.locator('td', { hasText: 'alice' }).first()).toBeVisible()
+  })
+
+  test('expands the row to reveal Client IP and User Agent', async ({ page }) => {
+    await page.locator('tr', { hasText: '/v1/chat/completions' }).first().click()
+
+    await expect(page.locator('text=Client IP').first()).toBeVisible()
+    await expect(page.locator('text=203.0.113.7').first()).toBeVisible()
+    await expect(page.locator('text=User Agent').first()).toBeVisible()
+    await expect(page.locator('text=curl/8.4.0').first()).toBeVisible()
+  })
+})
diff --git a/core/http/react-ui/src/pages/Traces.jsx b/core/http/react-ui/src/pages/Traces.jsx
index bc4cb6d18..92c39c7cd 100644
--- a/core/http/react-ui/src/pages/Traces.jsx
+++ b/core/http/react-ui/src/pages/Traces.jsx
@@ -304,8 +304,27 @@ function BackendTraceDetail({ trace }) {
 
 // Expanded detail for an API trace row
 function ApiTraceDetail({ trace }) {
+  const user = trace.user_name || trace.user_id
+  const meta = [
+    ['User', user],
+    ['Client IP', trace.client_ip],
+    ['User Agent', trace.user_agent],
+  ].filter(([, v]) => v)
   return (
     <div style={{ padding: 'var(--spacing-md)', background: 'var(--color-bg-secondary)', borderBottom: '1px solid var(--color-border)' }}>
+      {meta.length > 0 && (
+        <div style={{
+          display: 'grid', gridTemplateColumns: 'auto 1fr', gap: '0.25rem var(--spacing-md)',
+          alignItems: 'baseline', marginBottom: 'var(--spacing-md)', fontSize: '0.8125rem',
+        }}>
+          {meta.map(([label, value]) => (
+            <React.Fragment key={label}>
+              <span style={{ fontWeight: 600, color: 'var(--color-text-secondary)' }}>{label}</span>
+              <span style={{ fontFamily: 'var(--font-mono)', wordBreak: 'break-all' }}>{value}</span>
+            </React.Fragment>
+          ))}
+        </div>
+      )}
       {trace.error && (
         <div style={{
           background: 'var(--color-error-light)', border: '1px solid var(--color-error-border)',
@@ -360,6 +379,7 @@ export default function Traces() {
   const TRACE_SORT = {
     method: (a, b) => (a.request?.method || '').localeCompare(b.request?.method || ''),
     path: (a, b) => (a.request?.path || '').localeCompare(b.request?.path || ''),
+    user: (a, b) => (a.user_name || a.user_id || '').localeCompare(b.user_name || b.user_id || ''),
     status: (a, b) => (a.response?.status || 0) - (b.response?.status || 0),
     type: (a, b) => (a.type || '').localeCompare(b.type || ''),
     time: (a, b) => new Date(a.timestamp || 0) - new Date(b.timestamp || 0),
@@ -615,6 +635,7 @@ export default function Traces() {
                 <th style={{ width: '30px' }}></th>
                 {sortableTh('method', 'Method')}
                 {sortableTh('path', 'Path')}
+                {sortableTh('user', 'User')}
                 {sortableTh('status', 'Status')}
                 <th style={{ width: '40px' }}>Result</th>
               </tr>
@@ -626,6 +647,7 @@ export default function Traces() {
                     <td><i className={`fas fa-chevron-${expandedRow === i ? 'down' : 'right'}`} style={{ fontSize: '0.7rem' }} /></td>
                     <td><span className="badge badge-info">{trace.request?.method || '-'}</span></td>
                     <td style={{ fontFamily: 'var(--font-mono)', fontSize: '0.8125rem' }}>{trace.request?.path || '-'}</td>
+                    <td style={{ fontSize: '0.8125rem', color: 'var(--color-text-secondary)', maxWidth: '160px', overflow: 'hidden', textOverflow: 'ellipsis', whiteSpace: 'nowrap' }} title={trace.user_name || trace.user_id || ''}>{trace.user_name || trace.user_id || '-'}</td>
                     <td><span className={`badge ${(trace.response?.status || 0) < 400 ? 'badge-success' : 'badge-error'}`}>{trace.response?.status || '-'}</span></td>
                     <td style={{ textAlign: 'center' }}>
                       {trace.error
@@ -635,7 +657,7 @@ export default function Traces() {
                   </tr>
                   {expandedRow === i && (
                     <tr>
-                      <td colSpan="5" style={{ padding: 0 }}>
+                      <td colSpan="6" style={{ padding: 0 }}>
                         <ApiTraceDetail trace={trace} />
                       </td>
                     </tr>