Add Conformance tests for the server

[mikekistler]

Motivation and Context

This PR adds a new sample server for use with the [MCP Conformance test suite].

How Has This Been Tested?

Tested with the server conformance test suite and all pass except one which I believe is a test error.

npx @modelcontextprotocol/conformance server --url http://localhost:3001

Total: 29 passed, 1 failed

The failing scenario is tools-call-with-logging, which fails because it did not set the logging level at the start of the test.

Breaking Changes

No breaking changes.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update

Checklist

• I have read the MCP Documentation
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• I have added or updated documentation as needed

Additional context

[Copilot]

Pull Request Overview

This PR adds a new ConformanceServer sample that implements the MCP specification for testing against the MCP Conformance test suite. The server demonstrates all major MCP capabilities including tools, resources, prompts, sampling, elicitation, subscriptions, and logging. Testing shows 29 out of 30 conformance tests pass, with the single failure being a test configuration issue.

Key changes:

• Implements comprehensive tool handlers for testing different content types, logging, progress, error handling, sampling, and elicitation (including SEP-1034 and SEP-1330)
• Adds resource handlers for static text/binary content, templates with parameters, and subscribable resources
• Provides prompt handlers demonstrating simple, parameterized, embedded resource, and image-based prompts
• Includes subscription management and completion support

Reviewed Changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
samples/ComplianceServer/ComplianceServer.csproj	Defines the project structure targeting .NET 9.0 with references to ModelContextProtocol.AspNetCore
samples/ComplianceServer/Program.cs	Configures the MCP server with HTTP transport, registers handlers for tools/prompts/resources, and implements subscription management
samples/ComplianceServer/Tools/ComplianceTools.cs	Implements 12 test tools covering text/image/audio content, logging, progress, errors, sampling, and elicitation with SEP-1034/SEP-1330 support
samples/ComplianceServer/Resources/ComplianceResources.cs	Provides static text/binary resources and a parameterized template resource for conformance testing
samples/ComplianceServer/Prompts/CompliancePrompts.cs	Implements simple, parameterized, embedded resource, and image-based prompts
samples/ComplianceServer/appsettings.json	Standard ASP.NET Core configuration for logging and allowed hosts
samples/ComplianceServer/appsettings.Development.json	Development-specific logging configuration
samples/ComplianceServer/Properties/launchSettings.json	Defines HTTP and HTTPS launch profiles for localhost:3001
samples/ComplianceServer/ComplianceServer.http	Provides sample HTTP requests for testing the server endpoints
ModelContextProtocol.slnx	Adds the ComplianceServer project to the solution

Comments suppressed due to low confidence (1)

samples/ComplianceServer/Tools/ComplianceTools.cs:1

• Field names in result content access don't match the schema property names defined above. The code accesses 'stringField', 'numberField', and 'booleanField', but the schema defines 'name', 'age', 'score', 'status', and 'verified'.

using ModelContextProtocol;

[stephentoub]

Similarly here, you could return a PromptMessage instead of an enumerable of prompt messages, if you want.

[stephentoub]

Neat

[mikekistler]

@stephentoub I think I've addressed all your comments. Copilot wrote the test class -- I'm not sure it is right so please give that a close look.

[Copilot]

Pull Request Overview

Copilot reviewed 12 out of 12 changed files in this pull request and generated 15 comments.