Closed
Description
Describe the bug
I've put such configuration to .mcp.json
{
"servers": {
"GitHub": {
"type": "http",
"url": "https://api.githubcopilot.com/mcp/",
"headers": {
"Authorization": "Bearer ${input:github_pat}"
}
}
},
"inputs": [
{
"id": "github_pat",
"description": "GitHub personal access token",
"type": "promptString",
"password": true
}
]
}and got in Copilot output
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[Conversations Information] [Conversations] Found 2 MCP server(s) defined in "C:\Users\Andrii\Dev\GitHub\FSharp.Collections.Immutable\.mcp.json": Microsoft Docs, GitHub
[Conversations Information] [Conversations] Found 2 MCP server(s) defined in "C:\Users\Andrii\Dev\GitHub\FSharp.Collections.Immutable\.mcp.json": Microsoft Docs, GitHub
[Conversations Error] [Conversations] Failure while initializing MCP server 'GitHub'. System.Net.Http.HttpRequestException: Response status code does not indicate success: 400 (Bad Request).
at System.Net.Http.HttpResponseMessage.EnsureSuccessStatusCode()
at ModelContextProtocol.Client.StreamableHttpClientSessionTransport.SendMessageAsync(JsonRpcMessage message, CancellationToken cancellationToken)
at ModelContextProtocol.McpSession.SendRequestAsync(JsonRpcRequest request, CancellationToken cancellationToken)
at ModelContextProtocol.McpEndpointExtensions.SendRequestAsync[TParameters,TResult](IMcpEndpoint endpoint, String method, TParameters parameters, JsonTypeInfo`1 parametersTypeInfo, JsonTypeInfo`1 resultTypeInfo, RequestId requestId, CancellationToken cancellationToken)
at ModelContextProtocol.Client.McpClient.ConnectAsync(CancellationToken cancellationToken)
at ModelContextProtocol.Client.McpClient.ConnectAsync(CancellationToken cancellationToken)
at ModelContextProtocol.Client.McpClientFactory.CreateAsync(IClientTransport clientTransport, McpClientOptions clientOptions, ILoggerFactory loggerFactory, CancellationToken cancellationToken)
at ModelContextProtocol.Client.McpClientFactory.CreateAsync(IClientTransport clientTransport, McpClientOptions clientOptions, ILoggerFactory loggerFactory, CancellationToken cancellationToken)
at Microsoft.VisualStudio.Conversations.Service.Mcp.McpServerTracker.<>c__DisplayClass8_0.<<-ctor>b__0>d.MoveNext() in D:\a\_work\1\s\src\Copilot.Service\Mcp\McpServerTracker.cs:line 60
Then I attached to Visual Studio, debugged ModelContextProtocol.Client.StreamableHttpClientSessionTransport class and saw that response is "Invalid content type: must be 'application/json'\n"
Affected version
I don't know, I use the remote one
Visual Studio 2022 Version 17.14.5 Preview 1.0
Steps to reproduce the behavior
- Open solution
- Create
.mcp.jsonwith the content above - Save
- See error in Copilot output
Expected vs actual behavior
Visual Studio successfully gets the MCP tools list