How to Pass and Retrive env for authentication in MCP dotnet

[taimurlak]

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Question Category

• Protocol Specification
• SDK Usage
• Server Implementation
• General Implementation
• Documentation
• Other

Your Question

How can we pass env variables in MCP Client and Retrive in Server side, just like this

how can we pass on client side and get it for validation in server side for MCP dotnet?

[rude-seagull]

Same issue, I tried this :

await using IMcpClient mcpClient = await McpClientFactory.CreateAsync(
            new()
            {
                Id = "github",
                Name = "GitHub",
                TransportType = "stdio",
                Location = null,
                TransportOptions = new()
                {
                    ["command"] = "npx",
                    ["arguments"] = "-y @modelcontextprotocol/server-github",
                    ["env"] = JsonSerializer.Serialize(new Dictionary<string, string>
                    {
                        ["GITHUB_PERSONAL_ACCESS_TOKEN"] = ""
                    })
                },
            },

Without any luck

[taimurlak]

I tried both these, but didn't got anything, still after sometime got the Initialization timeout error.

[rude-seagull]

You could also try this (did not work for me but maybe this will do the trick for you)

await using IMcpClient mcpClient = await McpClientFactory.CreateAsync(
            new()
            {
                Id = "github",
                Name = "GitHub",
                TransportType = "stdio",
                Location = null,
                TransportOptions = new()
                {
                    ["command"] = "npx",
                    ["arguments"] = "-y @modelcontextprotocol/server-github",
                    ["env:GITHUB_PERSONAL_ACCESS_TOKEN"] = ""
                },
            },

[taimurlak]

Yess Thanks you sooo much, this work for me, i have been stuck here from many hours, Thank you soo much...

[rude-seagull]

Glad I could help 🤡

[taimurlak]

By the way do you know how can i get these env variables in my mcp tools in server, For example if i send my api key to server for authentication and want to validate it here, how can i get that api at here,

[taimurlak]

Or do you know any other way for authenticaiton or identity in mcp tools, actually i start this to understand the process of mcp authentication and authorication, i also this #135 discussion but didn't got any response