98bd125ddd
Serve the 2026-07-28 protocol over stdio by deciding the era from the opening message
...
The 2026-07-28 protocol did not work over stdio: subscriptions/listen
was hard-refused, a legacy initialize arriving during an in-flight
modern request was accepted and re-locked the connection, and a peer
cancel produced a trailing "Request cancelled" frame. All three share
one root cause: the connection's era was derived from which requests
had completed instead of being decided once, in wire order, from how
the client opened the connection.
Replace serve_dual_era_loop and serve_loop with a single serve_stream
driver that decides the era synchronously in the dispatcher's read
loop, before the request body is spawned. initialize (or any
envelope-less request) opens the legacy era, an enveloped request opens
the modern era, server/discover is answered without pinning, and a
stray leading notification opens nothing. A conflicting era claim on a
committed connection is refused (-32022 or -32600) rather than
silently switching.
Cancel silence is structural: each request answers through a one-shot
channel whose write target becomes a powerless void on a peer cancel,
so there is no cancelled-check at any write site. The generic JSON-RPC
dispatcher loses the code-0 cancel frame, the code-0 str(exc)
catch-all, and the inline_methods knob, and documents that handlers
are invoked synchronously in receive order with the returned awaitable
as the body.
Add a Posture enum (DUAL default, LEGACY_ONLY, MODERN_ONLY) on the
Server and MCPServer constructors, honoured by the stream driver and
the streamable-HTTP manager alike. Server.run(read, write) now stands
alone, Server.lifespan() is a bound context manager, and
serve_listener / newline_json_transport / close_subscriptions() give a
straightforward path for custom transports. See docs/migration.md for
the full list of observable changes.
2026-07-23 13:18:49 +00:00
837ef904f8
Align with spec #3002 : optional clientInfo, serverInfo in result _meta ( #3143 )
Deploy Docs / deploy-docs (push) Has been cancelled
CI / checks (push) Failing after 24m23s
CI / all-green (push) Has been cancelled
Conformance Tests / server-conformance (push) Has been cancelled
Conformance Tests / client-conformance (push) Has been cancelled
GitHub Actions Security Analysis / zizmor (push) Has been cancelled
2026-07-23 12:00:36 +01:00
03aaebd3aa
Add Streamable HTTP request body limits ( #3095 )
2026-07-16 08:33:32 +02:00
2713b53b12
Replace httpx and httpx-sse with httpx2 ( #2972 )
...
CI / checks (push) Failing after 1s
CI / all-green (push) Has been cancelled
Co-authored-by: Max Isbey <224885523+maxisbey@users.noreply.github.com >
2026-07-14 17:05:08 +01:00
9bdc03d54e
Add the client-side subscriptions/listen driver ( #3047 )
2026-07-07 14:26:09 +01:00
220d362112
docs: restructure into topical sections and add the four most-asked-for pages ( #3044 )
2026-07-01 21:06:04 +01:00
d39c68df23
De-flake conformance CI: solo re-verification, spawn-storm reduction, result artifacts ( #3043 )
2026-07-01 16:59:06 +01:00
ca10dade2c
Serve subscriptions/listen with a pluggable event bus (SEP-2575) ( #3035 )
2026-06-30 23:01:04 +01:00
4df609119f
Add a client extension API ( #3034 )
2026-06-30 21:31:02 +01:00
7322ca56f4
Require integrity protection for MRTR requestState ( #3032 )
2026-06-30 21:30:32 +01:00
0b200ef03b
Surface skipped conformance scenarios as baselined known failures ( #3030 )
2026-06-30 13:07:05 +01:00
8d0f928e40
Pass InputRequiredResult through the MCPServer prompt and resource pipelines ( #3020 )
2026-06-29 16:50:58 +01:00
8f2c97b769
Consult request_state only for the question a resolver is asking ( #3019 )
2026-06-29 16:44:05 +01:00
c85836a081
Drive resolver elicitation over the 2026-07-28 input_required flow ( #2986 )
...
Co-authored-by: Max Isbey <224885523+maxisbey@users.noreply.github.com >
2026-06-29 14:39:43 +01:00
f2e63c979a
Promote the v2 README to README.md ahead of the first v2 beta ( #3014 )
2026-06-29 12:01:54 +01:00
f664db8952
Add resolver dependency injection for MCPServer tools ( #2969 )
...
Co-authored-by: Max Isbey <224885523+maxisbey@users.noreply.github.com >
2026-06-29 11:51:46 +01:00
4b519782f1
Add a pluggable server extension API with MCP Apps ( #3003 )
...
Co-authored-by: Max Isbey <224885523+maxisbey@users.noreply.github.com >
2026-06-29 10:58:05 +01:00
3b78f86886
Add docs, tested examples, and a story for SEP-990 identity assertion ( #3004 )
2026-06-26 21:01:46 +02:00
067f90578c
Add SSE response mode to the 2026 streamable-HTTP server entry ( #3001 )
2026-06-26 19:09:08 +02:00
c0ecb70e24
Support RFC 8693 token exchange for enterprise IdP flows (SEP-990) ( #2988 )
...
Co-authored-by: Max Isbey <224885523+maxisbey@users.noreply.github.com >
2026-06-26 17:57:10 +02:00
ecdf09d44f
Deprecate Server.__init__ handlers for removed capabilities ( #3002 )
2026-06-26 17:51:13 +02:00
08b62308d4
Client auto-resolves InputRequiredResult via existing callbacks (SEP-2322) ( #2998 )
2026-06-26 17:35:23 +02:00
4caa41f6d5
Add story-style examples suite (27 stories + harness + CI) ( #2957 )
2026-06-26 12:02:27 +02:00
587340279e
Conformance burn-down: server-side InputRequiredResult, Mcp-Method/Name validation, x-mcp-header filter (14 scenarios → green) ( #2974 )
CI / checks (push) Failing after 0s
CI / all-green (push) Has been cancelled
2026-06-26 09:51:59 +02:00
0ee7f1b293
Split protocol types into a standalone mcp-types package ( #2973 )
2026-06-25 19:18:38 +02:00
2397319a68
Server-side 2026-07-28 stateless support: classifier, driver split, server/discover ( #2928 )
2026-06-21 19:34:17 +01:00
4573e4ac33
Deprecate roots, sampling, and logging methods per SEP-2577 ( #2926 )
2026-06-20 18:25:41 +02:00
48cf4950dc
Validate the iss authorization-response parameter (RFC 9207 / SEP-2468) ( #2921 )
2026-06-20 17:54:18 +02:00
e196857bc9
Prepare release machinery for v2 pre-releases ( #2831 )
2026-06-11 09:03:27 +01:00
5d826490b6
[v2] Dispatcher/ServerRunner receive-path swap — replaces BaseSession ( #2710 )
2026-06-09 12:58:47 +01:00
8cc187fac0
Remove Tasks (SEP-1686) from the SDK ( #2714 )
2026-06-02 18:27:05 +02:00
3eb579948a
Add subject and claims to AccessToken ( #2686 )
2026-05-26 13:13:55 +00:00
e6235d1667
Propagate contextvars.Context through anyio streams without modifying SessionMessage ( #2298 )
2026-03-31 12:49:38 -04:00
abfb482246
refactor(examples): migrate all HTTP examples to streamable_http_app() ( #2291 )
2026-03-16 11:37:01 +00:00
31a38b5078
fix: correct Context type parameters across examples and tests ( #2256 )
2026-03-09 16:52:56 +00:00
b9431d483f
fix: prevent command injection in example URL opening ( #2082 )
2026-02-18 15:16:44 +00:00
0a22a9dc33
refactor: replace lowlevel Server decorators with on_* constructor kwargs ( #1985 )
2026-02-12 15:55:54 +00:00
d3133ae6ce
chore: update author metadata to LF Projects ( #1992 )
2026-02-04 11:01:33 +00:00
1a8c14a5b8
refactor: replace mcp.types as types to from mcp import types ( #1986 )
2026-02-03 16:42:29 +00:00
4fc49c62bd
feat: add ClientRequestContext type alias for client-side handlers ( #1989 )
2026-02-03 17:37:38 +01:00
b1f7eec3cd
refactor: split RequestContext between server and client ( #1987 )
2026-02-03 14:35:07 +01:00
21822053df
Support different transports in Client ( #1972 )
2026-01-30 12:11:27 +00:00
1b5287c727
fix: remove unused requests dependency from simple-chatbot example ( #1958 )
2026-01-26 14:02:11 +00:00
acba5478a9
refactor: McpError renamed to MCPError and flatten parameters ( #1956 )
...
Co-authored-by: Max Isbey <224885523+maxisbey@users.noreply.github.com >
2026-01-26 14:37:44 +01:00
65c614e48e
Rename FastMCP to MCPServer ( #1951 )
2026-01-25 14:45:52 +01:00
f0ab53e194
Add meta to Client methods ( #1923 )
2026-01-22 14:50:39 +01:00
7b728a243e
refactor: drop unused logger/logging ( #1926 )
2026-01-22 11:56:41 +01:00
213cf993ca
Add conformance testing CI pipeline ( #1915 )
2026-01-21 16:04:35 +00:00
d41d0c0128
chore: add D212 lint rule to enforce Google-style docstrings ( #1892 )
2026-01-16 16:10:52 +00:00
df039bf97c
Add ergonomic Client class for testing MCP servers ( #1870 )
2026-01-16 15:49:26 +00:00
Max Isbey