python-sdk

modelcontextprotocol/python-sdk

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3ffe142e9a

Support Python 3.14 (#1834) Marcelo Trylesinski 2026-01-07 17:28:23 +01:00
1fd557afdc

Add type checker to examples/client (#1837) Marcelo Trylesinski 2026-01-07 17:08:18 +01:00
3863f203e9

Server initialize response update to last spec (add title, description) (#1634) Yann Jouanin 2026-01-06 22:34:08 +01:00
f397783c39

fix: add explicit type annotation for call_tool decorator (#1826) Jay Hemnani 2026-01-06 12:11:36 -08:00
201de920a0

refactor: use __future__.annotations (#1832) Marcelo Trylesinski 2026-01-06 20:03:13 +01:00
adcc17b968

types: add missing py.typed from examples package (#1833) Marcelo Trylesinski 2026-01-06 19:54:58 +01:00
6149b63a44

tests: add missing init files (#1831) Marcelo Trylesinski 2026-01-06 19:52:09 +01:00
37de50144f

fix: add StatelessModeNotSupported exception and improve tests (#1828) Max Isbey 2026-01-06 11:26:26 +00:00
bb6cb029f0

fix: raise clear error for server-to-client requests in stateless mode (#1827) Max Isbey 2026-01-05 17:17:54 +00:00
d52937b39c

Make refresh_token grant type optional in DCR handler (#1651) gazzadownunder 2026-01-05 23:41:45 +10:00
c7cbfbb302

docs: add guidance on discussing features before opening PRs (#1760) Max Isbey 2026-01-01 09:07:06 +00:00
78a9504ec1

fix: return HTTP 404 for unknown session IDs instead of 400 (#1808) Maxime 2025-12-31 09:06:12 -05:00
a9cc822a10

fix: accept HTTP 201 status code in token exchange (#1503) jnjpng 2025-12-19 10:22:00 -08:00
a4bf947540

fix: Token endpoint response for invalid_client (#1481) Ankesh Kumar Thakur 2025-12-19 23:49:00 +05:30
3f6b0597f1

docs: update CONTRIBUTING with v2 branching strategy (#1804) Max Isbey 2025-12-19 18:11:43 +00:00
06748eb4c4

fix: Include extra field for context log (#1535) V 2025-12-19 09:54:03 -08:00
2aa1ad2a69

feat: standardize timeout values to floats in seconds (#1766) Yugan 2025-12-19 17:52:56 +05:30
4807eb5a80

Add workflow to comment on PRs when released (#1772) Yugan 2025-12-19 16:47:13 +05:30
ef96a31671

ci: add v1.x branch to main-checks workflow (#1802) v1.25.0 Max Isbey 2025-12-18 16:59:30 +00:00
8ac0cab98c

Fix for Url Elicitation issue 1768 (#1780) zenlytix 2025-12-15 09:58:17 -08:00
65b36de4eb

fix: use correct python command name in test_stdio.py (#1782) v1.24.0 Ondrej Mosnáček 2025-12-12 15:02:38 +01:00
a3a4b8d11a

Add streamable_http_client which accepts httpx.AsyncClient instead of httpx_client_factory (#1177) Marcelo Trylesinski 2025-12-10 17:39:00 +01:00
cc8382ce3e

Fix JSON-RPC error response ID matching (#1720) Camila Rondinini 2025-12-10 16:15:21 +00:00
0dedbd9831

feat: client-side support for SEP-1577 sampling with tools (#1722) Jeremiah Lowin 2025-12-09 18:36:28 -05:00
779271ae38

chore: remove release-comment workflow (#1758) v1.23.3 Max Isbey 2025-12-09 15:45:08 +00:00
2bf9b10f63

Skip empty SSE data to avoid parsing errors (#1753) Arjun TS 2025-12-09 20:44:23 +05:30
8ac11ec604

fix: allow MIME type parameters in resource validation (RFC 2045) (#1755) Anton Pidkuiko 2025-12-09 14:56:40 +00:00
b7cc25493c

feat: add workflow to comment on PRs when released (#1750) Felix Weinberger 2025-12-09 12:22:07 +00:00
8b984d93a3

refactor(auth): remove unused _register_client method (#1748) Max Isbey 2025-12-08 21:50:20 +00:00
89ff338174

fix: skip priming events and close_sse_stream for old protocol versions (#1719) v1.23.2 Felix Weinberger 2025-12-04 14:44:08 +00:00
9ed0b93ceb

fix: handle ClosedResourceError in StreamableHTTP message router (#1384) Edison 2025-12-04 18:36:23 +08:00
72a34002aa

fix: add lifespan context manager to StreamableHTTP mounting examples (#1669) Tyler Mailman 2025-12-03 17:08:21 -05:00
8e02fc17e1

chore: update LATEST_PROTOCOL_VERSION to 2025-11-25 (#1715) v1.23.1 Felix Weinberger 2025-12-02 18:27:27 +00:00
d3a184119e

Merge commit from fork v1.23.0 Paul Carleton 2025-12-02 13:23:55 +00:00
fa851d93a2

feat: backwards-compatible create_message overloads for SEP-1577 (#1713) Felix Weinberger 2025-12-02 13:17:45 +00:00
f82b0c9371

Support client_credentials flow with JWT and Basic auth (#1663) Paul Carleton 2025-12-02 12:53:55 +00:00
281fd4765e

Add SSE polling support (SEP-1699) (#1654) Felix Weinberger 2025-12-02 11:44:49 +00:00
2cd178a962

Add on_session_created callback option (#1710) Camila Rondinini 2025-12-01 17:48:33 +00:00
c92bb2f7ff

SEP-1686: Tasks (#1645) Max Isbey 2025-11-28 18:51:58 +00:00
5983a650cc

Skip empty SSE data to avoid parsing errors (#1670) Felix Weinberger 2025-11-26 18:09:39 +00:00
02b7889929

Implement SEP-1036: URL mode elicitation for secure out-of-band interactions (#1580) Chris Coutinho 2025-11-25 12:00:21 +01:00
27279bc157

Update doc string on custom_route (#1660) Paul Carleton 2025-11-24 19:20:56 +00:00
f22501315e

feat: implement SEP-991 URL-based client ID (CIMD) support (#1652) Paul Carleton 2025-11-24 17:21:03 +00:00
f2517fe14b

fix: url for spec (#1659) Felix Weinberger 2025-11-24 16:59:48 +00:00
091afb82dc

Implement SEP-986: Tool name validation (#1655) Felix Weinberger 2025-11-24 16:46:57 +00:00
998f0ee4db

[auth][conformance] add conformance auth client (#1640) Paul Carleton 2025-11-24 13:52:04 +00:00
b19fa6f279

SEP-1330: Elicitation Enum Schema Improvements and Standards Compliance (#1246) Tapan Chugh 2025-11-23 15:32:08 -08:00
71c475588f

Implement SEP-1577 - Sampling With Tools (#1594) Olivier Chafik 2025-11-23 04:58:14 +00:00
c51936f61f

Add client_secret_basic authentication support (#1334) Jon Shea 2025-11-20 15:53:37 -05:00
397089a78e

Add tests for JSON Schema 2020-12 field preservation (SEP-1613) (#1649) Felix Weinberger 2025-11-20 20:51:13 +00:00
fcffa14b5b

docs: Update examples to use stateless HTTP with JSON responses (#1499) v1.22.0 adam jones 2025-11-20 15:06:37 +00:00
9c8f763aa8

chore: Lazy import jsonschema library (#1596) Liang Wu 2025-11-19 07:30:52 -08:00
c429549f9f

fix get_client_metadata_scopes on 401 (#1631) v1.21.2 Andrii Blyzniuk 2025-11-16 19:18:50 +02:00
5489e8b6fb

fix get_client_metadata_scopes on 401 (#1631) Andrii Blyzniuk 2025-11-16 19:18:50 +02:00
a357380cfa

feat: Pass through and expose additional parameters in ClientSessionGroup.call_tool and .connect_to_server (#1576) inaku 2025-11-16 23:57:43 +08:00
9724ad1ce6

Fix CI highest resolution test to actually test highest versions (#1609) v1.21.1 Max Isbey 2025-11-13 20:25:43 +00:00
116c13e2c6

Refactor func_metadata() implementation (#1496) Victorien 2025-11-13 21:21:15 +01:00
91ccdb3d65

Fix OAuth discovery fallback and URL ordering (#1624) Max Isbey 2025-11-13 19:37:24 +00:00
5e1aa4072b

Add client_id_metadata_document_supported to OAuthMetadata (#1603) Max Isbey 2025-11-13 17:13:55 +00:00
7d12e83cf4

refactor: extract OAuth helper functions and simplify provider state (#1586) Max Isbey 2025-11-13 13:28:48 +00:00
be730674ad

Add SEP-1034 conformance test support to everything-server (#1604) Felix Weinberger 2025-11-11 17:44:23 +00:00
720d7130e2

Add coverage baseline commit to git-blame-ignore (#1613) Max Isbey 2025-11-11 14:03:51 +00:00
a864840825

Add end-of-file-fixer pre-commit hook (#1610) Max Isbey 2025-11-11 13:23:08 +00:00
89e9c43acf

Get baseline 100% clean coverage (#1553) Max Isbey 2025-11-11 13:09:32 +00:00
da4fce2195

Add everything-server for comprehensive MCP conformance testing (#1587) Felix Weinberger 2025-11-09 13:45:37 +00:00
9eae96a05e

Add get_server_capabilities() to ClientSession (#1588) v1.21.0 Camila Rondinini 2025-11-06 20:44:40 +00:00
b7b0f8eebb

Add --frozen flag to uv run commands in Claude config (#1583) Max Isbey 2025-11-06 16:07:15 +00:00
3390e49c01

Implement SEP-985: OAuth Protected Resource Metadata discovery fallback (#1548) Chris Coutinho 2025-11-05 16:51:02 +01:00
de2289dc93

Fix typo in ClientSessionGroup doc string (#1572) inaku 2025-11-04 21:33:26 +08:00
3a9f118e34

Update Starlette to 0.49.1 in uv.lock (#1559) Cole Murray 2025-11-03 00:15:08 -08:00
202af49857

docs: use article "an" before "MCP" instead of "a" (#1558) Koichi ITO 2025-10-31 16:55:12 +08:00
6f2cd0cef0

Fix auth client example URL handling for oauth provider (#1549) v1.20.0 Paul Carleton 2025-10-30 15:35:44 +00:00
8cdac3d2f8

Fix pyright error and replace wildcard import with explicit imports (#1532) Max Isbey 2025-10-29 18:32:26 +00:00
f161149680

Implement RFC 7523 JWT flows (#1247) Luca Chang 2025-10-29 09:48:08 -07:00
db9e451551

fix: Replace remaining manual server polling with wait_for_server helper (#1529) Max Isbey 2025-10-29 11:27:57 +00:00
c44e68f766

Fix flaky timeout test in test_88_random_error (#1525) Max Isbey 2025-10-28 21:45:25 +00:00
3e86edfb2f

fix: Replace arbitrary sleeps with active server readiness checks in tests (#1527) Max Isbey 2025-10-28 21:42:33 +00:00
f97f7c4a7d

fix: Replace fixed sleep with active server readiness check in SSE tests (#1526) Max Isbey 2025-10-28 19:49:13 +00:00
7ac40af302

fix: Update spec links to new modelcontextprotocol.io location (#1491) Max Isbey 2025-10-28 18:13:40 +00:00
673423da0d

fix: replace deprecated dev-dependencies in examples/clients (#1518) Yukuan Jia 2025-10-28 22:09:14 +08:00
31ae5f4dc4

Relax Accept header requirement for JSON-only responses (#1500) adam jones 2025-10-27 17:46:04 +00:00
6c26d087df

update uv to 0.9.5 (#1510) v1.19.0 Max Isbey 2025-10-23 18:04:09 -07:00
340af403bd

Replace deprecated dev-dependencies with dependency-groups (#1488) Yukuan Jia 2025-10-24 08:22:16 +08:00
b7e4ae7542

test: use errno.ENOENT for command not found assertion (#1498) mingo007 2025-10-24 07:30:50 +08:00
bbc8b4904e

Upgrade GitHub Actions (#1473) Christian Clauss 2025-10-23 20:33:45 +02:00
9f9dbad416

fix: use proper dependency resolution in CI (#1507) Felix Weinberger 2025-10-23 10:25:48 -07:00
35a9ccdb42

fix: uv CVE-2025-62518 astral-tokio-tar issue GHSA-j5gw-2vrg-8fgx (#1505) Christian Clauss 2025-10-22 15:52:56 +02:00
1200ba0082

Allow CallToolResult to be returned directly to support _meta field for OpenAI Apps (#1459) Brandon Shar 2025-10-21 14:52:08 -04:00
40acbc596c

Expose RequestParams._meta in ClientSession.call_tool (#1231) Samuel Felipe Chenatti 2025-10-17 13:57:56 -03:00
c733eec5d9

Make client examples workspaces to reflect package code (#1466) Luca Chang 2025-10-17 09:13:39 -07:00
98f82485bd

feat: add tool metadata in FastMCP.tool decorator (#1463) Mat Leonard 2025-10-17 04:18:34 -07:00
dcc68ce56b

fix: Set the Server session initialization state immediately after respond… (#1478) v1.18.0 daamitt 2025-10-15 18:26:43 +05:30
de89457683

fix: send params as empty object for list methods without cursor (#1453) Felix Weinberger 2025-10-14 11:11:38 +01:00
cd7253c593

feat: add resource annotations support to FastMCP (#1468) Fenn Bailey 2025-10-14 21:07:37 +11:00
eb34ab7c72

fix: Remove unnecessary constructor from ResourceServerSettings (#1424) Rocky Haotian Du 2025-10-14 15:21:15 +08:00
7a933fe5da

Fix workspace configuration error with structured_output_lowlevel.py (#1471) Felix Weinberger 2025-10-13 15:53:46 +01:00
b4e50aa9f9

Handles message type Exception in lowlevel/server.py _handle_message function. Mentioned as TODO on line 528. (#786) AishwaryaKalloli 2025-10-13 18:59:03 +05:30
0e29cc4130

[client] Implement MCP OAuth scope selection and step-up authorization (#1324) Dogacan Colak 2025-10-13 09:18:00 -04:00
61399b386c

fix: update CLAUDE.md to remove auto-addition of reviewers. (#1431) v1.17.0 Felix Weinberger 2025-10-06 14:54:13 +01:00
7d335efd82

Update README to link to Python SDK documentation (#1430) Felix Weinberger 2025-10-06 14:50:17 +01:00