diff --git a/deepdoc/parser/mistral_parser.py b/deepdoc/parser/mistral_parser.py
index a7d5c014a7..f60d112141 100644
--- a/deepdoc/parser/mistral_parser.py
+++ b/deepdoc/parser/mistral_parser.py
@@ -387,6 +387,17 @@ class MistralParser(RAGFlowPdfParser):
     def check_installation(self) -> tuple[bool, str]:
         if not self.api_key:
             return False, "Mistral API key is not configured."
+
+        try:
+            r = requests.get(f"{self.base_url}/models", headers=self._headers(), timeout=10)
+            self.logger.info(f"[Mistral] API models endpoint reachable, status={r.status_code}")
+            if r.status_code != 200:
+                return False, f"Mistral API check failed: HTTP {r.status_code} {r.text[:200]}"
+        except Exception as exc:
+            reason = f"Mistral API check failed: {exc}"
+            self.logger.warning(reason)
+            return False, reason
+
         return True, ""
 
     def _raise_for_status(self, resp, action: str) -> None:
diff --git a/test/unit_test/deepdoc/parser/test_mistral_parser.py b/test/unit_test/deepdoc/parser/test_mistral_parser.py
index 78840f58e6..d3c49e38c2 100644
--- a/test/unit_test/deepdoc/parser/test_mistral_parser.py
+++ b/test/unit_test/deepdoc/parser/test_mistral_parser.py
@@ -297,6 +297,7 @@ def test_call_ocr_inline_posts_pages_selector(monkeypatch):
         return _Resp(200, {"pages": [{"index": 5, "markdown": "x", "blocks": []}], "usage_info": {"pages_processed": 1}})
 
     monkeypatch.setattr(m.requests, "post", fake_post)
+    monkeypatch.setattr(m.requests, "get", lambda *a, **k: _Resp(200, {}))
     out = p._call_ocr(b"%PDF-1.4 fake", "f.pdf", pages=[5])
     assert captured["url"].endswith("/ocr")
     assert captured["json"]["pages"] == [5]
@@ -309,6 +310,7 @@ def test_call_ocr_omits_pages_when_none(monkeypatch):
     p = _make_parser(m, api_key="sk-test")
     captured = {}
     monkeypatch.setattr(m.requests, "post", lambda url, headers=None, json=None, timeout=None, **kw: captured.update(json=json) or _Resp(200, {"pages": []}))
+    monkeypatch.setattr(m.requests, "get", lambda *a, **k: _Resp(200, {}))
     p._call_ocr(b"%PDF fake", "f.pdf", pages=None)
     assert "pages" not in captured["json"]
 
@@ -316,6 +318,7 @@ def test_call_ocr_omits_pages_when_none(monkeypatch):
 def test_call_ocr_raises_on_http_error(monkeypatch):
     m = _load_mistral_parser(monkeypatch)
     p = _make_parser(m, api_key="sk-bad")
+    monkeypatch.setattr(m.requests, "get", lambda *a, **k: _Resp(200, {}))
     monkeypatch.setattr(m.requests, "post", lambda *a, **k: _Resp(401, text="Unauthorized"))
     with pytest.raises(RuntimeError, match="401"):
         p._call_ocr(b"%PDF fake", "f.pdf", pages=None)
@@ -346,6 +349,7 @@ def test_call_ocr_upload_files_error_no_delete(monkeypatch):
     m = _load_mistral_parser(monkeypatch)
     p = _make_parser(m, api_key="sk-test", inline_max_bytes=4)
     calls = {"delete": []}
+    monkeypatch.setattr(m.requests, "get", lambda *a, **k: _Resp(200, {}))
     monkeypatch.setattr(m.requests, "post", lambda url, headers=None, json=None, data=None, files=None, timeout=None, **kw: _Resp(500, text="boom"))
     monkeypatch.setattr(m.requests, "delete", lambda url, headers=None, timeout=None, **kw: calls["delete"].append(url) or _Resp(200, {}))
     with pytest.raises(RuntimeError, match="500"):
@@ -358,7 +362,7 @@ def test_call_ocr_signed_url_error_triggers_cleanup(monkeypatch):
     p = _make_parser(m, api_key="sk-test", inline_max_bytes=4)
     calls = {"delete": []}
     monkeypatch.setattr(m.requests, "post", lambda url, headers=None, json=None, data=None, files=None, timeout=None, **kw: _Resp(200, {"id": "file-1"}))
-    monkeypatch.setattr(m.requests, "get", lambda url, headers=None, params=None, timeout=None, **kw: _Resp(403, text="nope"))
+    monkeypatch.setattr(m.requests, "get", lambda url, headers=None, params=None, timeout=None, **kw: _Resp(200, {}) if "/models" in url else _Resp(403, text="nope"))
     monkeypatch.setattr(m.requests, "delete", lambda url, headers=None, timeout=None, **kw: calls["delete"].append(url) or _Resp(200, {}))
     with pytest.raises(RuntimeError, match="403"):
         p._call_ocr(b"%PDF-too-big", "big.pdf", pages=None)