Merge branch 'main' into litellm_oss_staging_03_17_2026

.pre-commit-config.yaml

@@ -14,12 +14,12 @@ repos:
         types: [python]
         files: (litellm/|litellm_proxy_extras/|enterprise/).*\.py
         exclude: ^litellm/__init__.py$
-    # -   id: black
-    #     name: black
-    #     entry: poetry run black
-    #     language: system
-    #     types: [python]
-    #     files: (litellm/|litellm_proxy_extras/|enterprise/).*\.py
+    -   id: black
+        name: black
+        entry: poetry run black
+        language: system
+        types: [python]
+        files: (litellm/|litellm_proxy_extras/).*\.py
 -   repo: https://github.com/pycqa/flake8
     rev: 7.0.0  # The version of flake8 to use
     hooks:

litellm/llms/anthropic/experimental_pass_through/messages/transformation.py

@@ -126,7 +126,9 @@ class AnthropicMessagesConfig(BaseAnthropicMessagesConfig):
         litellm_params: dict,
         stream: Optional[bool] = None,
     ) -> str:
-        api_base = AnthropicModelInfo.get_api_base(api_base)
+        api_base = (
+            AnthropicModelInfo.get_api_base(api_base) or "https://api.anthropic.com"
+        )
         if not api_base.endswith("/v1/messages"):
             api_base = f"{api_base}/v1/messages"
         return api_base

litellm/llms/anthropic/skills/transformation.py

@@ -42,7 +42,9 @@ class AnthropicSkillsConfig(BaseSkillsAPIConfig):
 
         auth_header = AnthropicModelInfo.get_auth_header(api_key)
         if auth_header is None:
-            raise ValueError("ANTHROPIC_API_KEY or ANTHROPIC_AUTH_TOKEN is required for Skills API")
+            raise ValueError(
+                "ANTHROPIC_API_KEY or ANTHROPIC_AUTH_TOKEN is required for Skills API"
+            )
 
         headers.update(auth_header)
         headers["anthropic-version"] = "2023-06-01"

litellm/proxy/pass_through_endpoints/llm_passthrough_endpoints.py

@@ -586,7 +586,11 @@ async def anthropic_proxy_route(
     """
     [Docs](https://docs.litellm.ai/docs/pass_through/anthropic_completion)
     """
-    base_target_url = os.getenv("ANTHROPIC_API_BASE") or os.getenv("ANTHROPIC_BASE_URL") or "https://api.anthropic.com"
+    base_target_url = (
+        os.getenv("ANTHROPIC_API_BASE")
+        or os.getenv("ANTHROPIC_BASE_URL")
+        or "https://api.anthropic.com"
+    )
     encoded_endpoint = httpx.URL(endpoint).path
 
     # Ensure endpoint starts with '/' for proper URL construction

litellm/utils.py

@@ -6160,7 +6160,10 @@ def validate_environment(  # noqa: PLR0915
                     ["AZURE_API_BASE", "AZURE_API_VERSION", "AZURE_API_KEY"]
                 )
         elif custom_llm_provider == "anthropic":
-            if "ANTHROPIC_API_KEY" in os.environ or "ANTHROPIC_AUTH_TOKEN" in os.environ:
+            if (
+                "ANTHROPIC_API_KEY" in os.environ
+                or "ANTHROPIC_AUTH_TOKEN" in os.environ
+            ):
                 keys_in_environment = True
             else:
                 missing_keys.append("ANTHROPIC_API_KEY")
@@ -6399,7 +6402,10 @@ def validate_environment(  # noqa: PLR0915
                 missing_keys.append("OPENAI_API_KEY")
         ## anthropic
         elif model in litellm.anthropic_models:
-            if "ANTHROPIC_API_KEY" in os.environ or "ANTHROPIC_AUTH_TOKEN" in os.environ:
+            if (
+                "ANTHROPIC_API_KEY" in os.environ
+                or "ANTHROPIC_AUTH_TOKEN" in os.environ
+            ):
                 keys_in_environment = True
             else:
                 missing_keys.append("ANTHROPIC_API_KEY")

poetry.lock

@@ -3473,15 +3473,15 @@ files = [
 
 [[package]]
 name = "mcp"
-version = "1.25.0"
+version = "1.26.0"
 description = "Model Context Protocol SDK"
 optional = true
 python-versions = ">=3.10"
 groups = ["main"]
 markers = "python_version >= \"3.10\" and extra == \"proxy\""
 files = [
-    {file = "mcp-1.25.0-py3-none-any.whl", hash = "sha256:b37c38144a666add0862614cc79ec276e97d72aa8ca26d622818d4e278b9721a"},
-    {file = "mcp-1.25.0.tar.gz", hash = "sha256:56310361ebf0364e2d438e5b45f7668cbb124e158bb358333cd06e49e83a6802"},
+    {file = "mcp-1.26.0-py3-none-any.whl", hash = "sha256:904a21c33c25aa98ddbeb47273033c435e595bbacfdb177f4bd87f6dceebe1ca"},
+    {file = "mcp-1.26.0.tar.gz", hash = "sha256:db6e2ef491eecc1a0d93711a76f28dec2e05999f93afd48795da1c1137142c66"},
 ]
 
 [package.dependencies]

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "litellm"
-version = "1.82.4"
+version = "1.82.5"
 description = "Library to easily interface with LLM API providers"
 authors = ["BerriAI"]
 license = "MIT"
@@ -184,7 +184,7 @@ requires = ["poetry-core", "wheel"]
 build-backend = "poetry.core.masonry.api"
 
 [tool.commitizen]
-version = "1.82.4"
+version = "1.82.5"
 version_files = [
     "pyproject.toml:^version"
 ]