CSharpEssentials.LoggerHelper.MCP 5.2.0

CSharpEssentials.LoggerHelper.MCP

Give your AI assistant eyes into your logs.

CSharpEssentials.LoggerHelper.MCP adds a zero-dependency Model Context Protocol (MCP) server to any ASP.NET Core application that uses LoggerHelper. Point Claude, Cursor, GitHub Copilot, or any MCP-compatible client at /mcp and ask questions like:

• "Are all sinks healthy?"
• "Show me the last 10 logging errors"
• "What levels does the Email sink receive?"

No dashboard to stand up. No extra infrastructure. Just one POST endpoint and four tools.

Install

dotnet add package CSharpEssentials.LoggerHelper.MCP

Requires: CSharpEssentials.LoggerHelper ≥ 5.1.0

Wire up (Program.cs)

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddLoggerHelper(builder.Configuration);
builder.Services.AddLoggerHelperMcp();   // ← register MCP tools

var app = builder.Build();
app.UseLoggerHelper();
app.MapLoggerHelperMcp("/mcp");          // ← expose POST /mcp

app.Run();

Available MCP Tools

Example: Call via curl

# List available tools
curl -X POST http://localhost:5000/mcp \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list","params":{}}'

# Get health status
curl -X POST http://localhost:5000/mcp \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":2,"method":"tools/call","params":{"name":"loggerhelper_get_health","arguments":{}}}'

# Get last 5 errors
curl -X POST http://localhost:5000/mcp \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":3,"method":"tools/call","params":{"name":"loggerhelper_get_errors","arguments":{"count":5}}}'

Connect to Claude Desktop / Cursor

Add to your MCP client config:

{
  "mcpServers": {
    "loggerhelper": {
      "url": "http://localhost:5000/mcp",
      "transport": "http"
    }
  }
}

Then ask Claude: "Check my LoggerHelper sink health" — and it will call loggerhelper_get_health and return a natural-language summary.

Why this matters

Serilog and NLog have no built-in AI tooling. With LoggerHelper MCP:

• AI assistants can diagnose logging issues without reading log files
• Zero additional infrastructure (no Seq, no Kibana, no dashboard)
• Works with any MCP client (Claude, Cursor, VS Code Copilot, custom agents)
• Zero external dependencies — pure System.Text.Json + ASP.NET Core

Transport

The MCP server implements the Streamable HTTP transport (MCP spec 2024-11-05):

• POST /mcp → JSON-RPC 2.0 request/response

Supported JSON-RPC methods: initialize, tools/list, tools/call.

Docs

• loggerhelper.com
• GitHub