The Hangfire MCP server enables you to enqueue background jobs from any client supporting the Model Context Protocol (MCP), making it possible to execute various code types without writing additional implementation code. This integration is particularly useful for tools like VS Code in Agent Mode.
You can install Hangfire MCP as a .NET global tool:
dotnet tool install --global --add-source Nall.HangfireMCP
To configure the MCP server in VS Code, add the following to your configuration:
{
"servers": {
"hangfire-mcp": {
"url": "http://localhost:3001"
}
}
}
For standalone mode with more detailed configuration:
{
"servers": {
"hangfire-mcp-standalone": {
"type": "stdio",
"command": "HangfireMCP",
"args": [
"--stdio"
],
"env": {
"HANGFIRE_JOBS_ASSEMBLY": "path/to/Jobs.dll",
"HANGFIRE_JOBS_MATCH_EXPRESSION": "[?IsInterface && contains(Name, 'Job')]",
"HANGFIRE_CONNECTION_STRING": "Host=localhost;Port=5432;Username=postgres;Password=postgres;Database=hangfire"
}
}
}
}
The MCP server acts as a bridge between client applications and Hangfire's background job processing:
For .NET Aspire integration, you can set up your application like this:
var builder = DistributedApplication.CreateBuilder(args);
var postgresServer = builder
.AddPostgres("postgres-server")
.WithDataVolume()
.WithLifetime(ContainerLifetime.Persistent);
var postgresDatabase = postgresServer.AddDatabase("hangfire");
builder.AddProject<Projects.Web>("server")
.WithReference(postgresDatabase)
.WaitFor(postgresDatabase);
var mcp = builder
.AddProject<Projects.HangfireMCP_Standalone>("hangfire-mcp")
.WithEnvironment("HANGFIRE_JOBS_ASSEMBLY", "path/to/Jobs.dll")
.WithEnvironment("HANGFIRE_JOBS_MATCH_EXPRESSION", "[?IsInterface && contains(Name, 'Job')]")
.WithReference(postgresDatabase)
.WaitFor(postgresDatabase);
builder
.AddMCPInspector()
.WithSSE(mcp)
.WaitFor(mcp);
builder.Build().Run();
You can create your own MCP server using this project as a starting point. Here's how to set up a custom Hangfire MCP server:
var builder = WebApplication.CreateBuilder(args);
builder.WithMcpServer(args).WithToolsFromAssembly();
builder.Services.AddHangfire(cfg => cfg.UsePostgreSqlStorage(options =>
options.UseNpgsqlConnection(builder.Configuration.GetConnectionString("hangfire")))
);
builder.Services.AddHangfireMcp();
builder.Services.AddTransient<HangfireTool>();
var app = builder.Build();
app.MapMcpServer(args);
app.Run();
You can create custom tools for your MCP server:
[McpServerToolType]
public class HangfireTool(IHangfireDynamicScheduler scheduler)
{
[McpServerTool(Name = "RunJob")]
public string Run(
[Required] string jobName,
[Required] string methodName,
Dictionary<string, object>? parameters = null
)
{
var descriptor = new JobDescriptor(jobName, methodName, parameters);
return scheduler.Enqueue(descriptor, typeof(ITimeJob).Assembly);
}
}
Jobs are dynamically loaded from the specified assembly. You can configure how job names are matched using the HANGFIRE_JOBS_MATCH_EXPRESSION environment variable. This uses JMESPath expressions.
For example, the expression [?IsInterface && contains(Name, 'Job')] will match all interfaces that contain "Job" in their name.
To add this MCP server to Claude Code, run this command in your terminal:
claude mcp add-json "hangfire-mcp" '{"url":"http://localhost:3001"}'See the official Claude Code MCP documentation for more details.
There are two ways to add an MCP server to Cursor. The most common way is to add the server globally in the ~/.cursor/mcp.json file so that it is available in all of your projects.
If you only need the server in a single project, you can add it to the project instead by creating or adding it to the .cursor/mcp.json file.
To add a global MCP server go to Cursor Settings > Tools & Integrations and click "New MCP Server".
When you click that button the ~/.cursor/mcp.json file will be opened and you can add your server like this:
{
"mcpServers": {
"hangfire-mcp": {
"url": "http://localhost:3001"
},
"hangfire-mcp-standalone": {
"type": "stdio",
"command": "HangfireMCP",
"args": [
"--stdio"
],
"env": {
"HANGFIRE_JOBS_ASSEMBLY": "path/to/Jobs.dll",
"HANGFIRE_JOBS_MATCH_EXPRESSION": "[?IsInterface && contains(Name, 'Job')]",
"HANGFIRE_CONNECTION_STRING": "Host=localhost;Port=5432;Username=postgres;Password=postgres;Database=hangfire"
}
}
}
}To add an MCP server to a project you can create a new .cursor/mcp.json file or add it to the existing one. This will look exactly the same as the global MCP server example above.
Once the server is installed, you might need to head back to Settings > MCP and click the refresh button.
The Cursor agent will then be able to see the available tools the added MCP server has available and will call them when it needs to.
You can also explicitly ask the agent to use the tool by mentioning the tool name and describing what the function does.
To add this MCP server to Claude Desktop:
1. Find your configuration file:
~/Library/Application Support/Claude/claude_desktop_config.json%APPDATA%\Claude\claude_desktop_config.json~/.config/Claude/claude_desktop_config.json2. Add this to your configuration file:
{
"mcpServers": {
"hangfire-mcp": {
"url": "http://localhost:3001"
},
"hangfire-mcp-standalone": {
"type": "stdio",
"command": "HangfireMCP",
"args": [
"--stdio"
],
"env": {
"HANGFIRE_JOBS_ASSEMBLY": "path/to/Jobs.dll",
"HANGFIRE_JOBS_MATCH_EXPRESSION": "[?IsInterface && contains(Name, 'Job')]",
"HANGFIRE_CONNECTION_STRING": "Host=localhost;Port=5432;Username=postgres;Password=postgres;Database=hangfire"
}
}
}
}3. Restart Claude Desktop for the changes to take effect