diff --git a/main.py b/main.py
index bdab7c2..1f9a43b 100644
--- a/main.py
+++ b/main.py
@@ -19,6 +19,9 @@ from web_tools import get_page_content, web_search
 
 load_dotenv()
 
+BROJS_INFERENCE_URL = "https://platform.brojs.ru/jrnl-bh/api/inference/v1"
+DEFAULT_MODEL = "openai/gpt-oss-20b:free"
+
 SYSTEM_PROMPT = """\
 Ты исследовательский deep-агент (стиль deep agents from scratch).
 
@@ -37,6 +40,36 @@ SYSTEM_PROMPT = """\
 """
 
 
+def _api_key() -> str:
+    return (
+        os.getenv("OPENAI_API_KEY")
+        or os.getenv("JOURNAL_MCP_PAT")
+        or os.getenv("JOURNAL_TOKEN")
+        or ""
+    )
+
+
+def _base_url() -> str:
+    if os.getenv("OPENAI_BASE_URL"):
+        return os.environ["OPENAI_BASE_URL"]
+    if os.getenv("OPENAI_API_KEY"):
+        return os.getenv("OPENROUTER_BASE_URL", "https://openrouter.ai/api/v1")
+    return BROJS_INFERENCE_URL
+
+
+def _model() -> str:
+    return os.getenv("OPENAI_MODEL") or os.getenv("OPENROUTER_MODEL") or DEFAULT_MODEL
+
+
+def build_llm() -> ChatOpenAI:
+    return ChatOpenAI(
+        model=_model(),
+        base_url=_base_url(),
+        api_key=_api_key(),
+        temperature=0.2,
+    )
+
+
 def build_agent():
     WORKSPACE_DIR.mkdir(parents=True, exist_ok=True)
     backend = LocalShellBackend(
@@ -44,12 +77,7 @@ def build_agent():
         virtual_mode=True,
         inherit_env=True,
     )
-    llm = ChatOpenAI(
-        model=os.getenv("OPENAI_MODEL", "openai/gpt-oss-20b:free"),
-        base_url=os.getenv("OPENAI_BASE_URL", "https://openrouter.ai/api/v1"),
-        api_key=os.getenv("OPENAI_API_KEY", "fake"),
-        temperature=0.2,
-    )
+    llm = build_llm()
     return create_deep_agent(
         model=llm,
         tools=[web_search, get_page_content, export_virtual_files],