csharp-sdk/docs/concepts/elicitation/samples/server/Elicitation.http at 37e7d6924b5099898bcc1d952d6bb61a9d9167ff · modelcontextprotocol/csharp-sdk · GitHub

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@HostAddress = http://localhost:3001

# No session ID, so elicitation capabilities not declared.

POST {{HostAddress}}/
Accept: application/json, text/event-stream
Content-Type: application/json
MCP-Protocol-Version: 2025-11-25

{
    "jsonrpc": "2.0",
    "id": 2,
    "method": "tools/call",
    "params": {
        "name": "guess_the_number"
    }
}

###

POST {{HostAddress}}/
Accept: application/json, text/event-stream
Content-Type: application/json

{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "initialize",
    "params": {
        "clientInfo": {
            "name": "RestClient",
            "version": "0.1.0"
        },
        "capabilities": {
             "elicitation": {}
        },
        "protocolVersion": "2025-11-25"
    }
}

###

@SessionId = lgEu87uKTy8kLffZayO5rQ

POST {{HostAddress}}/
Accept: application/json, text/event-stream
Content-Type: application/json
Mcp-Session-Id: {{SessionId}}
MCP-Protocol-Version: 2025-11-25

{
    "jsonrpc": "2.0",
    "id": 2,
    "method": "tools/call",
    "params": {
        "name": "guess_the_number"
    }
}