diff --git a/fichero_printer/fichero/api.py b/fichero_printer/fichero/api.py
index a96eb7b..0c860ce 100644
--- a/fichero_printer/fichero/api.py
+++ b/fichero_printer/fichero/api.py
@@ -35,6 +35,7 @@ from fichero.printer import (
     PrinterNotFound,
     PrinterTimeout,
     connect,
+    find_printer,
 )
 
 # ---------------------------------------------------------------------------
@@ -217,7 +218,10 @@ def _ui_html() -> str:
       <div class="card">
         <h2>Connection</h2>
         <label for="address">Printer address</label>
-        <input id="address" value="{default_address}" placeholder="C9:48:8A:69:D5:C0">
+        <div style="display:flex;gap:8px;align-items:center">
+          <input id="address" value="{default_address}" placeholder="C9:48:8A:69:D5:C0" style="flex:1;width:auto">
+          <button type="button" id="scan-btn" class="alt" style="width:auto;white-space:nowrap" onclick="scanAddress()">&#128268; Scan</button>
+        </div>
 
         <div class="row">
           <div>
@@ -352,6 +356,29 @@ def _ui_html() -> str:
       await showResponse(response);
     }}
 
+    async function scanAddress() {{
+      const btn = document.getElementById("scan-btn");
+      const output = document.getElementById("output");
+      btn.disabled = true;
+      btn.textContent = "Scanning…";
+      output.textContent = "Scanning for printer (up to 8 s)…";
+      try {{
+        const response = await fetch("scan");
+        const data = await response.json();
+        if (response.ok && data.address) {{
+          document.getElementById("address").value = data.address;
+          output.textContent = JSON.stringify({{ status: response.status, ok: true, data }}, null, 2);
+        }} else {{
+          output.textContent = JSON.stringify({{ status: response.status, ok: false, data }}, null, 2);
+        }}
+      }} catch (e) {{
+        output.textContent = "Scan failed: " + e;
+      }} finally {{
+        btn.disabled = false;
+        btn.innerHTML = "&#128268; Scan";
+      }}
+    }}
+
     async function printText() {{
       const form = new FormData();
       form.set("text", document.getElementById("text").value);
@@ -410,6 +437,22 @@ async def docs():
     )
 
 
+@app.get(
+    "/scan",
+    summary="Scan for printer",
+    response_description="BLE address of the discovered printer",
+)
+async def scan_printer():
+    """Scan for a Fichero/D11s printer via BLE and return its address."""
+    try:
+        address = await find_printer()
+    except PrinterNotFound as exc:
+        raise HTTPException(status_code=404, detail=str(exc)) from exc
+    except Exception as exc:
+        raise HTTPException(status_code=502, detail=str(exc)) from exc
+    return {"address": address}
+
+
 @app.get(
     "/status",
     summary="Get printer status",