diff --git a/services/web-ui/public/modal-new-recorder.jsx b/services/web-ui/public/modal-new-recorder.jsx
index d54bac5..4508f17 100644
--- a/services/web-ui/public/modal-new-recorder.jsx
+++ b/services/web-ui/public/modal-new-recorder.jsx
@@ -1,5 +1,34 @@
 // modal-new-recorder.jsx — New Recorder dialog (SRT / RTMP / SDI)
 
+function ProbeResult({ result }) {
+  if (!result.ok) {
+    return (
+      <div style={{ marginTop: 6, padding: '8px 10px', background: 'var(--danger-soft)', border: '1px solid var(--danger)', borderRadius: 5, fontSize: 11.5, color: 'var(--danger)' }}>
+        Probe failed: {result.error}
+      </div>
+    );
+  }
+  const d = result.data || {};
+  const entries = Object.entries(d).filter(([, v]) => v !== null && typeof v !== 'object');
+  if (entries.length === 0) {
+    return (
+      <div style={{ marginTop: 6, padding: '8px 10px', background: 'var(--success-soft)', border: '1px solid var(--success)', borderRadius: 5, fontSize: 11.5, color: 'var(--success)' }}>
+        ✓ Source reachable
+      </div>
+    );
+  }
+  return (
+    <div style={{ marginTop: 6, padding: '10px 12px', background: 'var(--bg-2)', border: '1px solid var(--success)', borderRadius: 5, fontSize: 11.5 }}>
+      {entries.map(([k, v]) => (
+        <div key={k} style={{ display: 'flex', gap: 8, padding: '2px 0' }}>
+          <span style={{ color: 'var(--text-3)', minWidth: 100, flexShrink: 0 }}>{k}</span>
+          <span style={{ fontFamily: 'var(--font-mono)', fontSize: 11 }}>{String(v)}</span>
+        </div>
+      ))}
+    </div>
+  );
+}
+
 function NewRecorderModal({ open, onClose }) {
   const { PROJECTS, NODES } = window.ZAMPP_DATA;
   const [name, setName] = React.useState('');
@@ -18,6 +47,8 @@ function NewRecorderModal({ open, onClose }) {
   const [projectId, setProjectId] = React.useState(PROJECTS[0]?.id || '');
   const [submitting, setSubmitting] = React.useState(false);
   const [submitErr, setSubmitErr] = React.useState(null);
+  const [probing, setProbing] = React.useState(false);
+  const [probeResult, setProbeResult] = React.useState(null);
 
   React.useEffect(() => {
     if (sourceType !== 'SDI' || sdiDevices !== null) return;
@@ -26,6 +57,19 @@ function NewRecorderModal({ open, onClose }) {
       .catch(() => setSdiDevices([]));
   }, [sourceType]);
 
+  React.useEffect(() => { setProbeResult(null); }, [sourceType, srtUrl, rtmpUrl]);
+
+  const handleProbe = () => {
+    setProbing(true);
+    setProbeResult(null);
+    const body = sourceType === 'SRT'
+      ? { source_type: 'srt', url: srtUrl }
+      : { source_type: 'rtmp', url: rtmpUrl };
+    window.ZAMPP_API.fetch('/recorders/probe', { method: 'POST', body: JSON.stringify(body) })
+      .then(r => { setProbing(false); setProbeResult({ ok: true, data: r }); })
+      .catch(e => { setProbing(false); setProbeResult({ ok: false, error: e.message }); });
+  };
+
   const handleCreate = () => {
     if (!name.trim()) { setSubmitErr('Recorder name is required.'); return; }
     if (sourceType === 'SDI' && !sdiNodeId) { setSubmitErr('Select a capture node for SDI.'); return; }
@@ -99,22 +143,36 @@ function NewRecorderModal({ open, onClose }) {
           {sourceType === 'SRT' && (
             <div className="field">
               <label className="field-label">Source URL</label>
-              <input className="field-input mono" placeholder="srt://192.168.1.100:4200"
-                value={srtUrl} onChange={e => setSrtUrl(e.target.value)} />
+              <div style={{ display: 'flex', gap: 6 }}>
+                <input className="field-input mono" placeholder="srt://192.168.1.100:4200"
+                  value={srtUrl} onChange={e => setSrtUrl(e.target.value)} style={{ flex: 1 }} />
+                <button className="btn ghost sm" onClick={handleProbe} disabled={probing}
+                  style={{ flexShrink: 0, minWidth: 64 }}>
+                  {probing ? '…' : 'Probe'}
+                </button>
+              </div>
               <div style={{ fontSize: 11, color: 'var(--text-3)', marginTop: 4 }}>
                 Recorder connects out to this URL (caller mode).
               </div>
+              {probeResult && <ProbeResult result={probeResult} />}
             </div>
           )}
 
           {sourceType === 'RTMP' && (
             <div className="field">
               <label className="field-label">Source URL</label>
-              <input className="field-input mono" placeholder="rtmp://server/live/streamkey"
-                value={rtmpUrl} onChange={e => setRtmpUrl(e.target.value)} />
+              <div style={{ display: 'flex', gap: 6 }}>
+                <input className="field-input mono" placeholder="rtmp://server/live/streamkey"
+                  value={rtmpUrl} onChange={e => setRtmpUrl(e.target.value)} style={{ flex: 1 }} />
+                <button className="btn ghost sm" onClick={handleProbe} disabled={probing}
+                  style={{ flexShrink: 0, minWidth: 64 }}>
+                  {probing ? '…' : 'Probe'}
+                </button>
+              </div>
               <div style={{ fontSize: 11, color: 'var(--text-3)', marginTop: 4 }}>
                 Recorder pulls this RTMP stream.
               </div>
+              {probeResult && <ProbeResult result={probeResult} />}
             </div>
           )}
 
@@ -158,7 +216,8 @@ function NewRecorderModal({ open, onClose }) {
                           ? <option value="">No cluster nodes</option>
                           : NODES.map(n => {
                               const id = n.id || n.hostname || n.name || '';
-                              return <option key={id} value={id}>{id}</option>;
+                              const label = n.hostname || n.name || id;
+                              return <option key={id} value={id}>{label}</option>;
                             })}
                       </select>
                     </div>