diff --git a/src/scraper/exhaustive.py b/src/scraper/exhaustive.py
index 4cc2044..28228bf 100644
--- a/src/scraper/exhaustive.py
+++ b/src/scraper/exhaustive.py
@@ -171,6 +171,7 @@ class ExhaustiveScraper:
         tasks = [
             self._seed_search(),
             self._seed_wikipedia(),
+            self._seed_archive(),
         ]
         if settings.enable_reddit:
             tasks.append(self._seed_reddit())
@@ -329,6 +330,42 @@ class ExhaustiveScraper:
             except Exception as e:
                 logger.warning("Wikipedia API seed failed", lang=lang, error=str(e))
 
+    async def _seed_archive(self):
+        """Siembra Internet Archive (advancedsearch, mediatype:texts): documentos
+        FOIA, informes y libros históricos. Se siembra la página /details/<id>;
+        sus PDFs los descubre la recursión (la propia página los enlaza) y los
+        extrae _extract_pdf. Sin fallback de query: el AND estricto de archive.org
+        con el topic completo prima precisión — relajarlo mete ruido (verificado:
+        'Manises' a secas devuelve loza valenciana). Best-effort: nunca rompe el seed."""
+        try:
+            http = await self._get_http()
+            q = quote_plus(f"({self.topic}) AND mediatype:(texts)")
+            url = (
+                f"https://archive.org/advancedsearch.php?q={q}"
+                "&fl[]=identifier&fl[]=title&rows=12&page=1&output=json"
+            )
+            async with http.get(url) as resp:
+                if resp.status != 200:
+                    logger.warning("Archive.org seed non-200", status=resp.status)
+                    return
+                data = await resp.json(content_type=None)
+            docs = data.get("response", {}).get("docs", [])
+            added = 0
+            for d in docs:
+                ident = d.get("identifier")
+                if not ident:
+                    continue
+                item_url = f"https://archive.org/details/{ident}"
+                title = d.get("title")
+                await self.db.add_source(
+                    self.session_id, item_url, "web", depth=0,
+                    title=title if isinstance(title, str) else None
+                )
+                added += 1
+            logger.info("Archive.org seed", found=len(docs), added=added)
+        except Exception as e:
+            logger.warning("Archive.org seed failed", error=str(e))
+
     async def _seed_reddit(self):
         """Search Reddit — sequential to avoid rate limiting"""
         try: