Sourced from mcp's releases.

v1.9.1

What's Changed

• Add OAuth authentication client for HTTPX by @​ihrpr in modelcontextprotocol/python-sdk#751
• fastmcp: allow passing Tool directly to FastMCP constructor by @​vbarda in modelcontextprotocol/python-sdk#699
• add auth client sse by @​ihrpr in modelcontextprotocol/python-sdk#760
• Change default binding from 0.0.0.0 to 127.0.0.1 to align with security recommendations by @​ciccolo-anthropic in modelcontextprotocol/python-sdk#738
• fix: Pass cursor parameter to server by @​nbarbettini in modelcontextprotocol/python-sdk#745

New Contributors

• @​vbarda made their first contribution in modelcontextprotocol/python-sdk#699
• @​ciccolo-anthropic made their first contribution in modelcontextprotocol/python-sdk#738

Full Changelog: https://github.com/modelcontextprotocol/python-sdk/compare/v1.9.0...v1.9.1

v1.9.0

Protocol Version Update

Now the latest protocol version for Python SDK is 2025-03-26

What's Changed

• Fix typo in authentication section of README by @​mopg in modelcontextprotocol/python-sdk#676
• fix: 204 is an acceptable response to DELETEing the session by @​nbarbettini in modelcontextprotocol/python-sdk#697
• Minor tweaks to README for Streamable HTTP by @​evalstate in modelcontextprotocol/python-sdk#690
• Properly infer prefix for SSE messages by @​jlowin in modelcontextprotocol/python-sdk#659
• Simple Auth Example to use shttp in addition to sse by @​ihrpr in modelcontextprotocol/python-sdk#695
• Create ClientSessionGroup for managing multiple session connections. by @​mkeid in modelcontextprotocol/python-sdk#639
• fix typo: server has get_context attribute instead of request_context. by @​shimizukawa in modelcontextprotocol/python-sdk#446
• docs: clarify LLM API configuration in mcp_simple_chatbot README by @​ddltn in modelcontextprotocol/python-sdk#487
• fix: Add checks and better error messages on server object for mcp run by @​john0312 in modelcontextprotocol/python-sdk#297
• Fix hanging on streams when stdio_client exiting by @​LionNatsu in modelcontextprotocol/python-sdk#559
• feat: add message to ProgressNotification by @​aksheyd in modelcontextprotocol/python-sdk#435
• Update CI configuration to support multiple OS environments by @​DanielAvdar in modelcontextprotocol/python-sdk#708
• feat: add cursor pagination support to all client list methods by @​jerome3o-anthropic in modelcontextprotocol/python-sdk#718
• Add example for stateless server with JSON response by @​5enxia in modelcontextprotocol/python-sdk#704
• Include server examples folder in pyright check by @​ihrpr in modelcontextprotocol/python-sdk#667
• Set 2025-03-26 as the latest protocol version by @​ihrpr in modelcontextprotocol/python-sdk#719
• Fix example for multiple stateless servers by @​ihrpr in modelcontextprotocol/python-sdk#720
• fix: Update @​mcp.resource to use function documentation as default descrip… by @​jingyugao in modelcontextprotocol/python-sdk#489
• Add progress notification callback for client by @​ihrpr in modelcontextprotocol/python-sdk#721
• Servers to accept older versions of client by @​ihrpr in modelcontextprotocol/python-sdk#722

New Contributors

• @​mopg made their first contribution in modelcontextprotocol/python-sdk#676
• @​nbarbettini made their first contribution in modelcontextprotocol/python-sdk#697
• @​jlowin made their first contribution in modelcontextprotocol/python-sdk#659
• @​mkeid made their first contribution in modelcontextprotocol/python-sdk#639
• @​shimizukawa made their first contribution in modelcontextprotocol/python-sdk#446
• @​ddltn made their first contribution in modelcontextprotocol/python-sdk#487
• @​LionNatsu made their first contribution in modelcontextprotocol/python-sdk#559
• @​aksheyd made their first contribution in modelcontextprotocol/python-sdk#435

... (truncated)

• e80c015 fix: Pass cursor parameter to server (#745)
• 2ca2de7 Change default binding from 0.0.0.0 to 127.0.0.1 to align with security recom...
• 43ded92 add auth client sse (#760)
• 5a9340a fastmcp: allow passing Tool directly to FastMCP constructor (#699)
• e33cd41 Add OAuth authentication client for HTTPX (#751)
• 6353dd1 Servers to accept older versions of client (#722)
• 5d33861 Add progress notification callback for client (#721)
• 1bdeed3 fix: Update @​mcp.resource to use function documentation as default descrip… (...
• c2f8730 Fix example for multiple stateless servers (#720)
• 13f0182 Set 2025-03-26 as the latest protocol version (#719)
• Additional commits viewable in compare view

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot merge will merge this PR after your CI passes on it
• @dependabot squash and merge will squash and merge this PR after your CI passes on it
• @dependabot cancel merge will cancel a previously requested merge and block automerging
• @dependabot reopen will reopen this PR if it is closed
• @dependabot close will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
• @dependabot show <dependency name> ignore conditions will show all of the ignore conditions of the specified dependency
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)