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chore: update LATEST_PROTOCOL_VERSION to 2025-11-25 #1715

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Merged
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Dec 2, 2025
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chore: update LATEST_PROTOCOL_VERSION to 2025-11-25 #1715

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2 changes: 1 addition & 1 deletion src/mcp/shared/version.py
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Original file line number Diff line number Diff line change
@@ -1,3 +1,3 @@
from mcp.types import LATEST_PROTOCOL_VERSION

SUPPORTED_PROTOCOL_VERSIONS: list[str] = ["2024-11-05", "2025-03-26", LATEST_PROTOCOL_VERSION]
SUPPORTED_PROTOCOL_VERSIONS: list[str] = ["2024-11-05", "2025-03-26", "2025-06-18", LATEST_PROTOCOL_VERSION]
2 changes: 1 addition & 1 deletion src/mcp/types.py
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Expand Up @@ -24,7 +24,7 @@
not separate types in the schema.
"""

LATEST_PROTOCOL_VERSION = "2025-06-18"
LATEST_PROTOCOL_VERSION = "2025-11-25"

"""
The default negotiated version of the Model Context Protocol when no version is specified.
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2 changes: 1 addition & 1 deletion tests/issues/test_1027_win_unreachable_cleanup.py
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Expand Up @@ -95,7 +95,7 @@ def echo(text: str) -> str:
async with ClientSession(read, write) as session:
# Initialize the session
result = await session.initialize()
assert result.protocolVersion in ["2024-11-05", "2025-06-18"]
assert result.protocolVersion in ["2024-11-05", "2025-06-18", "2025-11-25"]

# Verify startup marker was created
assert Path(startup_marker).exists(), "Server startup marker not created"
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