Titanium Web Proxy

September 12, 2026 · View on GitHub

A lightweight, high-performance HTTP(S) proxy for Windows, Linux, and macOS.

Website · Download · Docs · Releases

Product	Best for
Titanium.Cli (`titanium` / `twp`) Download	Standalone reverse / edge proxy from the command line
Titanium Inspector Download	Desktop MITM debugger — session grid, inspectors, AutoResponder, breakpoints, HAR export
Titanium.Plus `titanium update --plus` (after installing CLI)	Optional ops: control plane, dashboard, observability
Titanium.Web.Proxy NuGet	Embed a proxy (MITM and/or reverse) in a .NET app

Requires .NET 10 or later for the library. CLI and Inspector downloads are self-contained (no SDK needed to run them).

What you can do

Decrypt and inspect HTTPS in a native desktop Inspector on Windows, macOS, and Linux — AutoResponder, Map Local/Remote, breakpoints, Composer, HAR, curl/fetch
Keep sign-in working: SSO hosts stay on OS bypass; hosts that reject MITM auto-tunnel
Speak modern HTTP — HTTP/2 by default, optional HTTP/3, WebSocket, gRPC, SSE, GraphQL rules in the same grid
Run the same engine as a reverse / edge proxy from the CLI (YAML, load balancing, ACME, live reload)
Embed in .NET via NuGet (MIT); Inspector is free for personal and education use

Full catalog: Features. Protocol coverage: protocol support matrix. HTTP/3 packaging: HTTP/3 wiki.

Performance

Tiny keep-alive GET (~56 B) on common reverse wires, plus WebSocket and unary gRPC:

Practical reverse proxy throughput on Linux (tiny requests)

Heavier reverse load (64 KB GET/POST on typical wires):

Practical reverse proxy throughput on Linux (64 KB)

RPS is requests per second (gRPC bars are RPC/s). Compared on the same harness vs YARP, nginx, HAProxy, and Envoy. See Performance.

Installation

Inspector and CLI (Windows, Linux, macOS): use Download — MSI / DMG / AppImage / .deb / .rpm / zip. Short walkthrough: Install.

After the CLI is on your PATH (or in the current folder):

titanium run -c twp.yaml
titanium test -c twp.yaml
titanium version --check
titanium update

titanium run is foreground (Ctrl+C to stop). Boot persistence: titanium service install -c twp.yaml — CLI — service. Each CLI zip also includes a twp alias.

Optional Plus: titanium update --plus, then plus.enabled: true — Plus.

Library (.NET)

dotnet add package Titanium.Web.Proxy
# Prerelease / beta:
dotnet add package Titanium.Web.Proxy --prerelease

Quick start (library)

Explicit HTTP(S) proxy on 127.0.0.1:8000 that logs each requested URL:

using System;
using System.Net;
using System.Threading.Tasks;
using Microsoft.Extensions.Logging;
using Titanium.Web.Proxy;
using Titanium.Web.Proxy.EventArguments;
using Titanium.Web.Proxy.Models;

using var proxyServer = new ProxyServer();

proxyServer.Logging.MinimumLevel = LogLevel.Information;
proxyServer.BeforeRequest += OnRequest;

var endPoint = new ExplicitProxyEndPoint(IPAddress.Loopback, 8000, decryptSsl: true);
proxyServer.AddEndPoint(endPoint);

// Create and trust the root certificate used to decrypt HTTPS traffic.
proxyServer.CertificateManager.EnsureRootCertificate(
    userTrustRootCertificate: true,
    machineTrustRootCertificate: false);

proxyServer.Start();
proxyServer.Logger.LogInformation("Proxy listening on 127.0.0.1:8000. Press Enter to stop.");
await Console.In.ReadLineAsync();
proxyServer.Stop();

Task OnRequest(object sender, SessionEventArgs e)
{
    proxyServer.Logger.LogInformation("{Url}", e.HttpClient.Request.Url);
    return Task.CompletedTask;
}

Point your client at 127.0.0.1:8000 as its HTTP and HTTPS proxy. Trusting a generated root certificate changes the current user's certificate store — only do this on a machine you control.

Examples and documentation

Website — product docs, download, getting started, features, release notes
Wiki — deeper guides (performance, streaming bodies, HTTP/3, protocol support) and a short Features pointer
Basic console proxy
WPF desktop example
Windows service example
API reference

Support and contributing

Bugs and feature requests: GitHub Issues
Programming questions: Stack Overflow (titanium-web-proxy tag)
Pull requests welcome — see CONTRIBUTING.md (includes local QA tooling for maintainers)