6c11684ebe
Make the subscription authorization hook accept-or-refuse instead of narrowing
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Rework the `subscriptions/listen` authorization seam to Go's shape: the hook
(now `authorize=` on ListenHandler / `authorize_subscriptions=` on MCPServer,
typed `AuthorizeSubscription`) either returns to accept the request as asked
or raises MCPError to refuse the whole request before the acknowledgment. It
no longer returns a narrowed filter, and the honored subset is again the plain
support-based echo of the request rather than an intersection with a grant.
Refusing on any unauthorized URI, with a uniform error, is now the documented
pattern; a non-MCPError from the hook still fails closed.
No-Verification-Needed: pushing early for review at maintainer request; verification to follow
2026-07-28 09:31:18 +00:00
b07b2b331f
Add a subscription narrowing hook and stop sending unrequested change notifications
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Two server-side gaps on the 2026-07-28 subscriptions/listen path, closed together
because either alone leaves the other's leak open.
Nothing let a server decide per caller what a subscription may watch: any client
could name any resource URI in its filter and the server honored it verbatim.
ListenHandler now takes an optional `narrow` hook (`MCPServer(narrow_subscriptions=...)`)
that runs once before the acknowledgment and returns the filter to grant, or
raises MCPError to refuse the request. The grant is intersected with the request
so a hook can narrow but never widen, and any other exception fails closed rather
than granting.
Separately, the modern-era standalone channel forwarded every notification, so
`ctx.session.send_tool_list_changed()` on a 2026-07-28 stdio connection wrote a
bare, unstamped list_changed frame that no subscription had requested. That
channel now drops the four change-notification methods; they reach clients only
through listen streams, which stamp and filter them.
2026-07-27 23:07:37 +00:00
923341c98a
Stop answering cancelled requests ( #3188 )
2026-07-27 23:26:00 +01:00
d3ffe87960
Split the registration request model from the registered-client record ( #3181 )
2026-07-27 23:11:01 +01:00
b9422f1c9b
Make the per-version wire packages private (mcp_types._v*) ( #3191 )
2026-07-27 22:16:48 +01:00
f599cdfcf9
Cache compiled output-schema validators on ClientSession ( #3134 )
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Co-authored-by: Max Isbey <224885523+maxisbey@users.noreply.github.com >
2026-07-26 11:29:10 +01:00
11934c90ae
Replace FileResource.is_binary with an encoding field ( #3171 )
2026-07-26 00:58:06 +01:00
814072c94d
Narrow message_handler's parameter to notifications and exceptions ( #3168 )
2026-07-26 00:24:48 +01:00
47bfa85e83
Remove the unused timeout parameter from OAuthClientProvider ( #3165 )
2026-07-26 00:22:15 +01:00
7163d8263f
Remove the deprecated RFC7523OAuthClientProvider ( #3169 )
2026-07-25 22:50:57 +01:00
e90a66b554
Rename scopes= to scope= on the client-credentials OAuth providers ( #3166 )
2026-07-25 20:23:36 +01:00
0cb920f126
Make CacheConfig() the Client cache default and None the off switch ( #3164 )
2026-07-25 17:50:53 +01:00
629ca297d2
Isolate the stdio server's stdin and stdout from handler subprocesses ( #3117 )
2026-07-25 13:05:51 +01:00
00a70148bc
Serve the 2026-07-28 protocol over stdio: decide the era from the opening request ( #3152 )
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2026-07-24 13:46:37 +01:00
837ef904f8
Align with spec #3002 : optional clientInfo, serverInfo in result _meta ( #3143 )
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2026-07-23 12:00:36 +01:00
3a6f2996cd
docs: load media examples from disk instead of inline base64 ( #3108 )
2026-07-16 20:41:05 +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 )
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Co-authored-by: Max Isbey <224885523+maxisbey@users.noreply.github.com >
2026-07-14 17:05:08 +01:00
1216c53693
fix: reject trailing newline in tool-name and URI-template varname validation ( #3076 )
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Python's $ with re.match also matches just before a single trailing newline, so tool-name validation accepted "name\n" and UriTemplate.parse accepted varnames like "foo\n". Switch both checks to re.fullmatch.
Closes #3084
2026-07-10 12:56:54 +00:00
4fc8882c02
docs: replace MkDocs with Zensical ( #3073 )
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Co-authored-by: Claude <noreply@anthropic.com >
Co-authored-by: Max Isbey <224885523+maxisbey@users.noreply.github.com >
2026-07-10 12:48:46 +01:00
9bdc03d54e
Add the client-side subscriptions/listen driver ( #3047 )
2026-07-07 14:26:09 +01:00
867bba6263
Share one event loop per test module to stop Windows socketpair churn ( #3070 )
2026-07-07 13:19:04 +01:00
d287c9868f
Extend resolver DI to sampling and roots requests ( #3049 )
2026-07-06 18:25:57 +01:00
53117cb3a9
Make client-side cancellation work over the 2026 transports ( #3046 )
2026-07-02 19:21:04 +01:00
e4d95e0d44
docs: add a "What's new in v2" page ( #3054 )
2026-07-02 15:01:30 +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
080f2a869d
Harden the dual-era stream loop's era-lock and rejection semantics ( #3040 )
2026-07-01 17:07:12 +01:00
e50fb5be19
Serve the 2026-07-28 era over stdio and other stream-pair transports ( #3038 )
2026-07-01 00:11:56 +01:00
ca10dade2c
Serve subscriptions/listen with a pluggable event bus (SEP-2575) ( #3035 )
2026-06-30 23:01:04 +01:00
48ef569f7e
Validate Mcp-Param-* headers server-side on the 2026-07-28 HTTP path (SEP-2243) ( #3033 )
2026-06-30 21:39:32 +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
b15b1d5f07
Add a client-side response cache honoring SEP-2549 caching hints ( #3023 )
2026-06-30 11:31:06 +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
533c6a8226
Add cache_hints constructor map for SEP-2549 caching hints ( #3015 )
2026-06-29 14:11:15 +00:00
c85836a081
Drive resolver elicitation over the 2026-07-28 input_required flow ( #2986 )
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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 )
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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 )
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Co-authored-by: Max Isbey <224885523+maxisbey@users.noreply.github.com >
2026-06-29 10:58:05 +01:00
e942d00b98
Re-vendor 2026-07-28 schema at spec ead35b59 (SubscriptionsListenResult) ( #3006 )
2026-06-27 10:15:34 +02:00
3b78f86886
Add docs, tested examples, and a story for SEP-990 identity assertion ( #3004 )
2026-06-26 21:01:46 +02:00
24717cc8eb
feat: RFC 6570 URI templates with operator-aware security ( #2356 )
2026-06-26 20:29:17 +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 )
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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
3945bdde11
Remove the dispatch-tier middleware hook ( #2997 )
2026-06-26 17:08:16 +02:00
b31d95a429
Make OpenTelemetry tracing the single default middleware ( #2995 )
2026-06-26 15:47:37 +02:00
cc596195bb
Switch RFC7523OAuthClientProvider warning to MCPDeprecationWarning ( #2996 )
2026-06-26 15:27:57 +02:00
Max Isbey