Update our Session Hijacking mitigation documentation to describe the
new TokenInfo.UserID field and how the streamable transport uses it to
bind sessions to users.
Fixes#571
This change adds support for RFC 9728 (OAuth 2.0 Protected Resource Metadata)
by introducing a `ProtectedResourceMetadataHandler`.
The handler includes built-in CORS support with `Access-Control-Allow-Origin: *`
by default, as OAuth metadata is public information meant for client discovery.
Documentation includes examples for using custom CORS policies with
popular middleware libraries (github.com/rs/cors and github.com/jub0bs/cors).
The implementation follows RFC 9728 §3.1 for OAuth 2.0 Authorization Server
Metadata discovery, enabling clients to discover protected resource capabilities
and authentication requirements.
This CL implements support for SEP-1699, adding the following new API:
- Event.Retry corresponds to the 'retry' field of a server sent event.
This is used to signal client retry behavior.
- RequestExtra.CloseStream is set by the streamable transport to allow
closing a stream.
The streamable server transport is updated to set CloseStream for calls,
allowing server operations or middleware to close the underlying stream.
If the configured 'reconnectAfter' delay is set, a 'retry' message is
sent prior to terminating the stream.
The streamable client transport is updated to read the configured delay.
Fixes#630
AudioContent should have had a non-pointer receiver, to be consistent
with other content types. Add this to our log of rough edges to
reconsider for v2.
Fixes#641
Add initial support for URL mode elicitation, by introducing the new
types, as well as both server and client-side validation.
A follow-up CL will add support for ErrURLElicitationRequired.
For #623
Implement SEP 986, enforcing restrictions on tool names. Since we're
already at v1 we couldn't turn this into a panic, so use an error log
instead. This is consistent with the typescript SDK. A note is left in
our 'rough edges' doc to panic in v2.
Fixes#621
Start keeping a log of rough edges we've discovered post v1.0.0, so that
they're discoverable (along with their workarounds), and so that we can
fix them in v2.
Add missing documentation on resumability and redelivery in the
streamable transport.
Indirectly, also update stale transcluded examples. Example changes
weren't causing CI failure as we only trigger the docs check on changes
to the raw docs.
Also significantly lessen our warnings, and note that this is a release
candidate, rewrite Acknowledgements to be Acknowledgements /
Alternatives, since other MCP SDKs continue to be actively developed.
Add a framework for feature documentation, and start populating it with
our SDK documentation.
This framework is as follows:
- internal/docs/**.src.md is the markdown source for the docs/
directory.
- The x/example/internal/cmd/weave tool is used to compile these docs to
the top-level docs, supporting both linked code samples and generated
tables of contents.
- The readme-check workflow is updated to check these docs as well.
- The structure of these docs follows the MCP spec.
- Wherever possible, example code is linked from actual Go documentation
examples, so that it is testable.
Some minor modifications to the weave tool were made to support this
framework.
Additionally, partially fill out this documentation with content on
base protocol and client features, as well as troubleshooting help.
Along the way, a bug was encountered that our LoggingTransport was not
concurrency safe. This is fixed with a mutex.
Fixes https://github.com/modelcontextprotocol/go-sdk/issues/466
Fixes https://github.com/modelcontextprotocol/go-sdk/issues/409
Updates https://github.com/modelcontextprotocol/go-sdk/issues/442
