diff --git a/backend/services/calendar_sync.py b/backend/services/calendar_sync.py
index 8192a6c..eb27720 100644
--- a/backend/services/calendar_sync.py
+++ b/backend/services/calendar_sync.py
@@ -1,7 +1,9 @@
 """
-Unified calendar sync — ForexFactory only.
+Unified calendar sync.
   1. FF live JSON (nfs.faireconomy.media) → this week + next week  (actual values, precise)
   2. FF HTML scraper → weeks 3..N ahead                            (upcoming forecasts)
+  3. FMP API fallback → weeks 3..N ahead, only if step 2 got blocked (ForexFactory now
+     403s the scraper — likely Cloudflare) AND an FMP key is configured (services.fmp_calendar)
 Called by the background loop in main.py and manually via POST /api/eco/calendar-sync.
 """
 import logging
@@ -44,6 +46,18 @@ def calendar_sync(weeks_ahead: int = 8) -> Dict[str, Any]:
         if scrape_weeks > 0:
             r_scrape = scrape_upcoming(weeks_ahead=scrape_weeks)
             result["scrape"] = r_scrape
+
+            # FF's scraper gets 403'd (Cloudflare) often enough that "weeks 3..N" can
+            # silently come back empty — fall back to FMP for that same range when it does.
+            if not r_scrape.get("total_upserted"):
+                from services.fmp_calendar import check_fmp_key, fetch_upcoming
+                if check_fmp_key()["configured"]:
+                    r_fmp = fetch_upcoming(weeks_ahead=weeks_ahead)
+                    result["fmp_fallback"] = r_fmp
+                    if r_fmp.get("total_upserted"):
+                        source = "ff+fmp"
+                else:
+                    result["fmp_fallback"] = {"skipped": "no_key"}
         else:
             result["scrape"] = {"skipped": True}
 
diff --git a/frontend/src/pages/Config.tsx b/frontend/src/pages/Config.tsx
index abc9096..fa95490 100644
--- a/frontend/src/pages/Config.tsx
+++ b/frontend/src/pages/Config.tsx
@@ -798,6 +798,7 @@ export default function Config() {
   const [newsapiKey, setNewsapiKey] = useState('')
   const [eiaKey, setEiaKey] = useState('')
   const [fredKey, setFredKey] = useState('')
+  const [fmpKey, setFmpKey] = useState('')
   const [calendarRefreshH, setCalendarRefreshH] = useState(6)
   const [showKeys, setShowKeys] = useState(false)
   const [savedMsg, setSavedMsg] = useState('')
@@ -960,11 +961,12 @@ export default function Config() {
     if (newsapiKey) keys.newsapi_key = newsapiKey
     if (eiaKey) keys.eia_api_key = eiaKey
     if (fredKey) keys.fred_api_key = fredKey
+    if (fmpKey) keys.fmp_api_key = fmpKey
     updateApiKeys(keys, {
       onSuccess: () => {
         setSavedMsg('API keys saved')
         setTimeout(() => setSavedMsg(''), 2000)
-        setOpenaiKey(''); setNewsapiKey(''); setEiaKey(''); setFredKey('')
+        setOpenaiKey(''); setNewsapiKey(''); setEiaKey(''); setFredKey(''); setFmpKey('')
       }
     })
   }
@@ -1597,7 +1599,7 @@ export default function Config() {
               <RefreshCw className="w-4 h-4 text-indigo-400" /> Calendar Auto-Sync
             </h2>
             <div className="text-xs text-slate-400 mb-3">
-              Interval between automatic economic calendar syncs (FXStreet primary, Forex Factory fallback).
+              Interval between automatic economic calendar syncs (Forex Factory live JSON + HTML scraper; FMP API used as fallback for weeks 3+ if the FF scraper gets blocked — needs an FMP key below).
             </div>
             <div className="flex items-center gap-3">
               <label className="text-xs text-slate-500 whitespace-nowrap">Refresh every</label>
@@ -1637,11 +1639,12 @@ export default function Config() {
                 {showKeys ? <EyeOff className="w-3.5 h-3.5" /> : <Eye className="w-3.5 h-3.5" />}
               </button>
             </div>
-            <div className="grid grid-cols-3 gap-4">
+            <div className="grid grid-cols-4 gap-4">
               {[
                 { label: 'NewsAPI Key', value: newsapiKey, setter: setNewsapiKey, placeholder: 'Get at newsapi.org' },
                 { label: 'EIA API Key', value: eiaKey, setter: setEiaKey, placeholder: 'Get at eia.gov' },
                 { label: 'FRED API Key', value: fredKey, setter: setFredKey, placeholder: 'Get at fred.stlouisfed.org' },
+                { label: 'FMP API Key', value: fmpKey, setter: setFmpKey, placeholder: 'Calendar fallback — financialmodelingprep.com' },
               ].map(({ label, value, setter, placeholder }) => (
                 <div key={label}>
                   <label className="text-xs text-slate-500 mb-1 block">{label}</label>
@@ -1657,7 +1660,7 @@ export default function Config() {
             </div>
             <button
               onClick={saveKeys}
-              disabled={savingKeys || (!newsapiKey && !eiaKey && !fredKey)}
+              disabled={savingKeys || (!newsapiKey && !eiaKey && !fredKey && !fmpKey)}
               className="mt-3 flex items-center gap-1.5 bg-blue-600 hover:bg-blue-500 disabled:opacity-40 text-white px-4 py-2 rounded text-sm font-semibold">
               <Save className="w-4 h-4" />
               {savingKeys ? 'Saving...' : 'Save keys'}