Revert "Update MCP version from 1.10.1 to 1.20.0 (#16281)" (#16300)

This reverts commit 34c12d0131.

.circleci/config.yml

@@ -884,7 +884,7 @@ jobs:
             pip install "pytest-asyncio==0.21.1"
             pip install "respx==0.22.0"
             pip install "pydantic==2.10.2"
-            pip install "mcp==1.20.0"
+            pip install "mcp==1.10.1"
       # Run pytest and generate JUnit XML report
       - run:
           name: Run tests
@@ -1151,7 +1151,7 @@ jobs:
             pip install "respx==0.22.0"
             pip install "hypercorn==0.17.3"
             pip install "pydantic==2.10.2"
-            pip install "mcp==1.20.0"
+            pip install "mcp==1.10.1"
             pip install "requests-mock>=1.12.1"
             pip install "responses==0.25.7"
             pip install "pytest-xdist==3.6.1"
@@ -1204,7 +1204,7 @@ jobs:
             pip install "respx==0.22.0"
             pip install "hypercorn==0.17.3"
             pip install "pydantic==2.10.2"
-            pip install "mcp==1.20.0"
+            pip install "mcp==1.10.1"
             pip install "requests-mock>=1.12.1"
             pip install "responses==0.25.7"
             pip install "pytest-xdist==3.6.1"
@@ -1562,7 +1562,7 @@ jobs:
             pip install "pytest-asyncio==0.21.1"
             pip install "pytest-cov==5.0.0"
             pip install "tomli==2.2.1"
-            pip install "mcp==1.20.0"
+            pip install "mcp==1.10.1"
       - run:
           name: Run tests
           command: |

.circleci/requirements.txt

@@ -13,6 +13,6 @@ google-cloud-aiplatform==1.43.0
 google-cloud-iam==2.19.1
 fastapi-sso==0.16.0 
 uvloop==0.21.0
-mcp==1.20.0    # for MCP server  
+mcp==1.10.1    # for MCP server  
 semantic_router==0.1.10 # for auto-routing with litellm
 fastuuid==0.12.0

pyproject.toml

@@ -34,7 +34,7 @@ pydantic = "^2.5.0"
 jsonschema = "^4.22.0"
 numpydoc = {version = "*", optional = true} # used in utils.py
 
-uvicorn = {version = "^0.31.1", optional = true}
+uvicorn = {version = "^0.29.0", optional = true}
 uvloop = {version = "^0.21.0", optional = true, markers="sys_platform != 'win32'"}
 gunicorn = {version = "^23.0.0", optional = true}
 fastapi = {version = ">=0.120.1", optional = true}
@@ -44,7 +44,7 @@ rq = {version = "*", optional = true}
 orjson = {version = "^3.9.7", optional = true}
 apscheduler = {version = "^3.10.4", optional = true}
 fastapi-sso = { version = "^0.16.0", optional = true }
-PyJWT = { version = ">=2.8.0,<3.0.0", optional = true }
+PyJWT = { version = "^2.8.0", optional = true }
 python-multipart = { version = "^0.0.18", optional = true}
 cryptography = {version = "*", optional = true}
 prisma = {version = "0.11.0", optional = true}
@@ -58,7 +58,7 @@ pynacl = {version = "^1.5.0", optional = true}
 websockets = {version = "^13.1.0", optional = true}
 boto3 = {version = "1.36.0", optional = true}
 redisvl = {version = "^0.4.1", optional = true, markers = "python_version >= '3.9' and python_version < '3.14'"}
-mcp = {version = "^1.20.0", optional = true, python = ">=3.10"}
+mcp = {version = "^1.10.0", optional = true, python = ">=3.10"}
 litellm-proxy-extras = {version = "0.4.1", optional = true}
 rich = {version = "13.7.1", optional = true}
 litellm-enterprise = {version = "0.1.20", optional = true}

requirements.txt

@@ -6,7 +6,7 @@ fastapi==0.120.1 # server dep
 starlette==0.49.1 # starlette fastapi dep
 backoff==2.2.1 # server dep
 pyyaml==6.0.2 # server dep
-uvicorn==0.31.1 # server dep
+uvicorn==0.29.0 # server dep
 gunicorn==23.0.0 # server dep
 fastuuid==0.13.5 # for uuid4
 uvloop==0.21.0 # uvicorn dep, gives us much better performance under load
@@ -19,7 +19,7 @@ google-cloud-aiplatform==1.47.0 # for vertex ai calls
 google-cloud-iam==2.19.1 # for GCP IAM Redis authentication
 google-genai==1.22.0
 anthropic[vertex]==0.54.0
-mcp==1.20.0    # for MCP server
+mcp==1.10.1    # for MCP server
 google-generativeai==0.5.0 # for vertex ai calls
 async_generator==1.10.0 # for async ollama calls
 langfuse==2.59.7 # for langfuse self-hosted logging

tests/test_litellm/test_mcp_version.py

@@ -1,74 +0,0 @@
-"""
-Test to verify MCP package version is 1.20.0 or higher.
-"""
-import pytest
-
-
-def test_mcp_version():
-    """
-    Verify that the MCP package version is 1.20.0 or higher.
-    This test ensures the MCP dependency upgrade was successful.
-    """
-    try:
-        import mcp
-
-        # Get version from package metadata
-        try:
-            from importlib.metadata import version
-
-            mcp_version = version("mcp")
-        except ImportError:
-            # Fallback for older Python versions
-            import pkg_resources
-
-            mcp_version = pkg_resources.get_distribution("mcp").version
-
-        # Parse version string and check
-        version_parts = mcp_version.split(".")
-        major = int(version_parts[0])
-        minor = int(version_parts[1]) if len(version_parts) > 1 else 0
-
-        # Version should be 1.20.0 or higher
-        assert major >= 1, f"MCP major version should be >= 1, got {major}"
-        if major == 1:
-            assert (
-                minor >= 20
-            ), f"MCP minor version should be >= 20 for major version 1, got {minor}"
-
-        print(f"✓ MCP version {mcp_version} meets requirement (>= 1.20.0)")
-
-    except ImportError:
-        pytest.skip("MCP package not installed")
-
-
-def test_mcp_imports():
-    """
-    Verify that all required MCP imports are still available after the version update.
-    This ensures backward compatibility of the MCP package.
-    """
-    try:
-        # Test all imports used in the litellm codebase
-        from mcp import ClientSession, StdioServerParameters
-        from mcp.client.sse import sse_client
-        from mcp.client.stdio import stdio_client
-        from mcp.client.streamable_http import streamablehttp_client
-        from mcp.types import CallToolRequestParams as MCPCallToolRequestParams
-        from mcp.types import CallToolResult as MCPCallToolResult
-        from mcp.types import TextContent
-        from mcp.types import Tool as MCPTool
-
-        # Verify all imports are not None
-        assert ClientSession is not None
-        assert StdioServerParameters is not None
-        assert sse_client is not None
-        assert stdio_client is not None
-        assert streamablehttp_client is not None
-        assert MCPCallToolRequestParams is not None
-        assert MCPCallToolResult is not None
-        assert TextContent is not None
-        assert MCPTool is not None
-
-        print("✓ All MCP imports are available and backward compatible")
-
-    except ImportError as e:
-        pytest.fail(f"MCP import failed: {e}")