* Initial plan
* Allow handlers for empty tool/prompt/resource collections
Changed condition from `IsEmpty: false` to `not null` check in McpServerImpl.cs for resources (line 298), prompts (line 459), and tools (line 547). This allows handlers to be synthesized even when collections are empty, enabling dynamic addition of items after initialization.
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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: Stephen Toub <stoub@microsoft.com>
* Decouple Handlers and Collections (e.g. ToolsHandler and ToolsCollection) from Capabilities by promoting them to the options types.
Also, group all handlers in container classes, for server, I decided to move McpServerHandlers down to Mcp.Core and move the NotificationHandlers there too.
Also, Fix ListResourceTemplatesHandler issue.
* Add remarks for empty protocol capability types
* Keep JsonIgnore properties and mark them as Obsolete
* Continue supporting Obsolete members
* Update Obsolete messages to indicate the member will be removed
* Add EditorBrowsable Never to the remaining obsolete members
* Update content according to latest spec
* Add Title to a bunch of types
* Add _meta to lots of types
* Address feedback, more cleanup, fix NAOT test failure
Right now by default, the client and server hardcode the initial spec version, and if there's a mismatch, the request fails.
With this change, by default both client and server are allowed to float to any supported version.
- It allows a single MCP session spanning multiple requests
to be handled by different servers without sharing state
- It does require the servers share data protection keys, but this
is standard for ASP.NET Core cookies and antiforgery as well
- It immediately throws for unsupported operations like sampling
* Simplify ModelContextProtocol.AspNetCore README
* Add StreamableHttpHandler
* Use "docker info" in CheckIsDockerAvailable
* Call WithHttpTransport in samples, tests and README
* Cleanup test namespaces
* Add CanConnect_WithMcpClient_AfterCustomizingRoute test
* Simplify relative URI handling
* Handle request made directly to the MapMcp route pattern
* Add Messages_FromNewUser_AreRejected test
* Fix README
* Shorten UserIdClaim ValueTuple names
* Remove MaxReconnectAttempts and ReconnectDelay from SseClientTransportOptions
- Add proper AdditionalHeaders support
* Add route pattern parameter to MapMcp
* Add configureOptionsAsync
* Use Kestrel for all in-memory HTTP tests
* Use ApplicationStopping token for SSE responses
* Use RegisterNotificationHandler in MapMcp tests
* Work around SocketsHttpHandler bug where it doesn't call DispseAsync on the stream returned by the ConnectCallback
* Move notification handler registrations to capabilities
Currently request handlers are set on the capability objects, but notification handlers are set after construction via an AddNotificationHandler method on the IMcpEndpoint interface. This moves handler specification to be at construction as well. This makes it more consistent with request handlers, simplifies the IMcpEndpoint interface to just be about message sending, and avoids a concurrency bug that could occur if someone tried to add a handler while the endpoint was processing notifications.
* Address more feedback and further cleanup
* Reduce dependencies to 8.x versions of packages
When building for netstandard2.0 or net8.0, the ModelContextProtocol library now only depends on 8.x versions of nuget packages, rather than using the newer 9.x versions. The exception to this are packages that don't have 8.x versions.
This also introduces a net9.0 tfm. When building for net9.0, it'll use 9.x versions of packages.
The PR temporarily removes the Microsoft.Extensions.AI.nupkg reference (the Microsoft.Extensions.AI.Abstractions reference is still very much there). The latest Microsoft.Extensions.AI package on nuget has a System.Text.Json 9.x reference, but the next build to be published drops that down to 8.x as well. Once that build is published, the dependency will be added back, and temporary polyfills (in particular TemporaryAIFunctionFactory) will be deleted.
* Fix StdioClientSessionTransport shutdown
StreamClientSessionTransport's ReadMessageAsync method does await CleanupAsync in its finally. CleanupAsync awaits _readTask. _readTask _is_ ReadMessageAsync. So it's waiting for itself to complete, which will then always timeout. We may want to refactor how this works more in the future, but for now, make sure it doesn't wait for itself.
* Fix dangling requests when server unexpectedly shuts down
If the client makes a request to the server and while waiting for the response the server shuts down, the client hangs. Make sure that when the client's message loops ends due to the server's output it's reading from ends, any pending requests are notified.
* Add net9.0 testing
* Avoid docker port conflicts from test suites running concurrently
* Allow user-defined JsonSerializerOptions for user-defined and inputs and hardcode everything else to the source generator.
* Add validation for user-defined JsonSerializerOptions.
* Remove out of date comment.
* Address feedback and add tests
* Add ModelContextProtocol.AspNetCore
- Remove IServerTransport and HttpListenerSseServerTransport
- Replace HttpListenerSseServerTransport usage in tests with ASP.NET Core.
Co-authored-by: Eirik Tsarpalis <eirik.tsarpalis@gmail.com>
Co-authored-by: Jeff Handley <jeffhandley@users.noreply.github.com>
* Supporting resource templates with read resource callback
Fixes#123
* Aligning the resource data structures with the 2024-11-05 schema
- Introducing separate classes for Text and Blob ResourceContents
- Custom JSON converter to allow those types to be returned, making it easier to follow the type system against the spec
- Updated tests
* Apply suggestions from code review
Co-authored-by: Stephen Toub <stoub@microsoft.com>
Co-authored-by: Peder Holdgaard Pedersen <127606677+PederHP@users.noreply.github.com>
* Putting files back where they belong
* Adding an internal constructor to prevent overloads
* Addressing feedback
* Apply suggestions from code review
Co-authored-by: Stephen Toub <stoub@microsoft.com>
* Update src/ModelContextProtocol/Protocol/Types/ResourceContents.cs
* Addressing feedback
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Co-authored-by: Stephen Toub <stoub@microsoft.com>
Co-authored-by: Peder Holdgaard Pedersen <127606677+PederHP@users.noreply.github.com>
- This also paves the way for better multi-session support
- We should definitely rethink names for the transport API
- For now, I kept the names similar as possible, so we can
focus on the API shape
Co-authored-by: Stephen Toub <stoub@microsoft.com>
* Add XunitLoggerProvider
* Avoid logging to stale ITestOutputHelper in fixture disposal
* Use LoggedTest base class everywhere an ILoggerFactory is used
* Add initial support for Resource Templates
* Make ListResourceTemplatesHandler not required
The server was throwing if this handler wasn't specified, and it should probably be optional anyway.
* Remove extra line
Co-authored-by: Stephen Toub <stoub@microsoft.com>
* Fix spaces
Co-authored-by: Stephen Toub <stoub@microsoft.com>
* Fix spaces
Co-authored-by: Stephen Toub <stoub@microsoft.com>
* Add and use a default ListResourceTemplatesHandler
If no ListResourceTemplatesHandler is specified, use a default one that returns an empty result.
* Fix spaces
* Spaces
* Add Client extensions for ListResourceTemplates
* Integration Test for Client ListResourceTemplates
* Fix comment
Co-authored-by: Stephen Toub <stoub@microsoft.com>
* Make Defaults internal
Co-authored-by: Stephen Toub <stoub@microsoft.com>
* Simplify test call
Co-authored-by: Stephen Toub <stoub@microsoft.com>
* Make delegate static
Co-authored-by: Stephen Toub <stoub@microsoft.com>
* Fix test comment
* Spaces
* Fix xml doc
Co-authored-by: Stephen Toub <stoub@microsoft.com>
* Make default handler inline
* Spaces
Co-authored-by: Stephen Halter <halter73@gmail.com>
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Co-authored-by: Stephen Toub <stoub@microsoft.com>
Co-authored-by: Stephen Halter <halter73@gmail.com>
* Change type of Tool.InputSchema to be JsonElement
* Add schema validation in the InputSchema property setter.
* Simplify AIFunction tool adapter.
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Co-authored-by: Eirik Tsarpalis <eirik.tsarpalis@gmail.com>
