What's Changed

• Ensure failed oauth registration response is read before accessing response.text by@jlowin in#1118
• Avoiding to parse string arguments containing valid JSON if the argument annotation is str by@cjg in#1113
• Update routing for streamable HTTP to avoid 307 redirect by@yurikunash in#1115
• add regression tests for#1113 by@bhosmer-ant in#1122
• Fix BaseModel method name conflicts in func_metadata by@bhosmer-ant in#1123
• README - replace code snippets with examples by@ihrpr in#1136
• README - replace code snippets with examples - direct execution and display utilities by@ihrpr in#1137
• Close server session after handle stateless request by@hopeful0 in#1116
• tests: useinline_snapshot.Is on parametrized test by@Kludex in#945
• Add regression test for stateless request memory cleanup by@felixweinberger in#1140
• Implement RFC9728 - Support WWW-Authenticate header by MCP client by@yurikunash in#1071
• Add streamable HTTP starlette example to Python SDK docs by@pamelafox in#1111
• fix markdown error in README in main by@ihrpr in#1147
• README - replace code snippets with examples - add lowlevel to snippets by@ihrpr in#1150
• README - replace code snippets with examples - streamable http by@ihrpr in#1155
• chore: don't allow users to create issues outside the templates by@Kludex in#1163
• Tests(cli): Add coverage for helper functions by@davenpi in#635
• Docs: Update CallToolResult parsing in README by@functicons in#812
• docs: add pre-commit install guide on CONTRIBUTING.md by@dingo4dev in#995
• fix flaky fix-test_streamablehttp_client_resumption test by@ihrpr in#1166
• README - replace code snippets with examples -- auth examples by@ihrpr in#1164
• Support falling back to OIDC metadata for auth by@LucaButBoring in#1061

New Contributors 🙏

• @cjg made their first contribution in#1113
• @yurikunash made their first contribution in#1115
• @hopeful0 made their first contribution in#1116
• @pamelafox made their first contribution in#1111
• @davenpi made their first contribution in#635
• @functicons made their first contribution in#812

Full Changelog:v1.11.0...v1.12.0

Contributors

What's Changed

• Update MCP to use Pydantic>=2.11 by@medaminezghal in#1041
• Flaky test fix by@AishwaryaKalloli in#1050
• chore: bump ruff by@Kludex in#1085
• docs: fix dev server command in README (#848) by@Lasdw6 in#859
• fix: support "form_post" to be one of response modes in authorization server metadata validation by@ke-yu in#1046
• Embed code snippets for README from executable examples by@ihrpr in#1055
• tests: add lowest dependency tests by@Kludex in#1067
• Fix async resource functions not being awaited by@ihrpr in#1092
• fix: Expose completions capability by@fredericbarthelet in#865
• Fix Pydantic field alias consistency in structured output by@sjwhole in#1099
• Update text to make clear Elicitation is not directly associated with… by@evalstate in#1062
• Unify process termination on POSIX & Windows (+ tests) by@felixweinberger in#1044
• Improve child process termination on POSIX & Windows by@felixweinberger in#1078
• remove max message size by@ihrpr in#1105
• #552 by@DanielAvdar in#707
• Doc update + validation in SseServerTransport + existing test fixes: addresses Issue:#827 by@AishwaryaKalloli in#900
• clean up log.error by@ihrpr in#1109
• Fix completions by@ihrpr in#1107
• fix pyright check in CI by@ihrpr in#1108
• fweinberger/align shutdown with spec by@felixweinberger in#1091
• Fix: Prevent session manager shutdown on individual session crash by@soby in#841
• Adding description field to the FastMCP get_prompt method by@megandsouza03 in#614
• chore: add markdownlint on pre-commit hook and lint md files by@dingo4dev in#996
• Fix missing line in generated snippets by@ihrpr in#1117
• The lifespan_context object here is not a dictionary like the other e… by@johnbikes in#1002

New Contributors

• @Lasdw6 made their first contribution in#859
• @ke-yu made their first contribution in#1046
• @fredericbarthelet made their first contribution in#865
• @sjwhole made their first contribution in#1099
• @soby made their first contribution in#841
• @megandsouza03 made their first contribution in#614
• @dingo4dev made their first contribution in#996
• @johnbikes made their first contribution in#1002

Full Changelog:v1.10.1...v1.11.0

Contributors

What's Changed

• Remove setting global logging config by@njbrake in#1048

New Contributors

• @njbrake made their first contribution in#1048

Full Changelog:v1.10.0...v1.10.1

Contributors

🚀 Implementation for Spec revision 2025-06-18

• feat: implement MCP-Protocol-Version header requirement for HTTP transport by@felixweinberger in#898
• Rename ResourceReference to ResourceTemplateReference by@ihrpr in#947
• feat: add _meta to more objects by@felixweinberger in#963
• Include context into completions by@ihrpr in#966
• Add support for Elicitation by@ihrpr in#625
• Update _meta usage guidance in types by@ihrpr in#971
• Add title to tools, resources, prompts by@felixweinberger in#972
• Add resource Link by@ihrpr in#974
• MCP server separation into Authorization Server (AS) and Resource Server (RS) roles per spec PR#338 by@ihrpr in#982
• RFC 8707 Resource Indicators Implementation by@ihrpr in#991
• Fix/.well-known/oauth-authorization-server dropping path by@ihrpr in#1014
• Make "resource" optional on earlier protocols by@dr3s in#1017
• Add schema validation to lowlevel server by@bhosmer-ant in#1005
• feat: Add structured output support for tool functions by@bhosmer-ant in#993
• Update latest protocol version to 2025-06-18 by@ihrpr in#1036

Other changes

• set timeout for sse in httpx_client_factory by@ihrpr in#943
• clean-up: removed unused ci file by@DarkDk123 in#950
• ci: add timeout on the test job by@Kludex in#955
• Fix uncaught exception in MCP server by@ddworken in#967
• Allow longer duration in test_188_concurrency by@msabramo in#969
• Add support for DNS rebinding protections by@ddworken in#861
• Fix Windows subprocess NotImplementedError (STDIO clients) by@theailanguage in#596
• Remove github from auth examples by@ihrpr in#1011
• refactor: rename DummyProcess to FallbackProcess in Windows stdio by@felixweinberger in#1015
• ci: add --frozen flag to all uv commands in workflows by@dsp-ant in#970
• unpin jsonschema version by@ihrpr in#1037

New Contributors 🙏

• @DarkDk123 made their first contribution in#950
• @msabramo made their first contribution in#969
• @theailanguage made their first contribution in#596

Full Changelog:v1.9.4...v1.10.0

Contributors

What's Changed

• Support Cursor OAuth client registration by@sam-tombury in#895
• feat: support audio content by@LucaButBoring in#725
• Usetotal_seconds instead ofseconds on timeout by@Kludex in#896
• normalize string ID to int in server messages for compatibility by@wangxm345566462 in#851
• relax validation by@dr3s in#879
• Fix uncaught exception in MCP server by@ddworken in#822
• UseFileUrl on theresources/list call in thesimple-resource example by@nandsha in#907
• Create issue templates by@Kludex in#935
• chore: create union for working with message content by@LucaButBoring in#939
• Allow to pass timeout as float by@Kludex in#941

New Contributors

• @vincent-pli made their first contribution in#899
• @sam-tombury made their first contribution in#895
• @LucaButBoring made their first contribution in#725
• @wangxm345566462 made their first contribution in#851
• @dr3s made their first contribution in#879
• @ddworken made their first contribution in#822
• @nandsha made their first contribution in#907

Full Changelog:v1.9.3...v1.9.4

Contributors

What's Changed

• improve server logging by@samuelcolvin in#867

Full Changelog:v1.9.2...v1.9.3

Contributors

What's Changed

• FixClientSessionGroup cleanup logic by@mkeid in#787
• Chatbot example: clean up servers in correct order by@clareliguori in#353
• llamallama-3.2-90b-vision-preview is deprecated by@Arash-IND in#523
• Support custom httpx client creation by@nickcoai in#752
• Python lint: Ruff rule PLW1510 -- subprocess-run-without-check by@cclauss in#794
• add support for parallel run by@lk-naath in#739
• Fix async callable object tools by@stephanlensky in#568
• [DOC] Fix example usage of get_context (plus a little more) by@hesreallyhim in#801
• Pin uv version by@Kludex in#806
• Fix building auth metadata paths by@Rodriguespn in#779
• Fix auth tests and ruff format by@ihrpr in#818
• send errors to pending requests if server closes by@mroch in#333
• RFC: Lower log levels used for connections by@nickcoai in#821
• Support for http request injection propagation to tools by@ihrpr in#816
• Prevent stdio connection hang for missing server path. by@TimChild in#401
• Fix and updateOAuthAuthorizationServerProvider snippet inREADME.md by@alvarobartt in#830
• Client sampling and roots capabilities set to None if not implemented by@lorenzocesconetto in#802
• Support for http request injection propagation in StreamableHttp by@ihrpr in#833

New Contributors

• @clareliguori made their first contribution in#353
• @Arash-IND made their first contribution in#523
• @nickcoai made their first contribution in#752
• @lk-naath made their first contribution in#739
• @stephanlensky made their first contribution in#568
• @hesreallyhim made their first contribution in#801
• @Rodriguespn made their first contribution in#779
• @mroch made their first contribution in#333
• @TimChild made their first contribution in#401
• @alvarobartt made their first contribution in#830
• @lorenzocesconetto made their first contribution in#802

Full Changelog:v1.9.1...v1.9.2

Contributors

What's Changed

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

New Contributors

• @vbarda made their first contribution in#699
• @ciccolo-anthropic made their first contribution in#738

Full Changelog:v1.9.0...v1.9.1

Contributors

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

New Contributors

• @mopg made their first contribution in#676
• @nbarbettini made their first contribution in#697
• @jlowin made their first contribution in#659
• @mkeid made their first contribution in#639
• @shimizukawa made their first contribution in#446
• @ddltn made their first contribution in#487
• @LionNatsu made their first contribution in#559
• @aksheyd made their first contribution in#435
• @DanielAvdar made their first contribution in#708
• @5enxia made their first contribution in#704
• @jingyugao made their first contribution in#489

Full Changelog:v1.8.1...v1.9.0

Contributors

What's Changed

• Fix streamable http sampling by@ihrpr in#693

Full Changelog:v1.8.0...v1.8.1

Contributors