Open-source alternatives to Anyproxy

An HTTP proxy library for Go

node-http-proxy is a Node.js HTTP proxy library used for forwarding requests to target servers. It functions as reverse proxy middleware capable of mapping incoming routes to target destinations and transforming request and response data streams. The library includes a WebSocket proxy gateway that upgrades standard HTTP connections into bidirectional streams between clients and backend servers. It also provides a response transformer for modifying bodies, location headers, and cookie domains. The project covers traffic routing management via rule-based translation tables and secure connectio

Hetty is an HTTP intercepting proxy and web security research toolkit used to capture, inspect, and modify traffic between a browser and a server. It functions as an HTTP request editor for creating and replaying manual requests to test server behavior and as a project-based traffic logger that isolates network logs across different security research engagements. The tool provides a request-response interception loop that pauses outgoing requests and incoming responses in transit, allowing for manual editing or cancellation. It includes a manual request replay engine to construct and transmit

Reqable is a cross-platform network debugging tool that functions as an HTTP/HTTPS debugging proxy, a REST API client, and a traffic replay tool. It captures, inspects, and modifies live traffic using a local MITM proxy engine, supports VPN tunnel capture for mobile devices, and provides a Python scripting sandbox for custom traffic processing. The application is available on Windows, macOS, Linux, iOS, and Android. The tool distinguishes itself by combining traffic interception with breakpoint-based request modification, allowing users to pause live HTTP traffic for manual inspection and alt

node-http-proxy is a Node.js HTTP proxy library and toolkit used to create programmable reverse proxies, load balancers, and traffic routers. It functions as a system for forwarding HTTP and WebSocket traffic from clients to backend target servers. The project provides capabilities for translating incoming request paths into backend addresses using programmable matching rules. It supports the creation of bidirectional tunnels to facilitate real-time communication via WebSocket proxying. The library covers the modification of request and response headers, including the rewriting of cookies an

Mitmproxy is an interactive, programmable network proxy engine designed for traffic analysis and protocol manipulation. It functions as a gateway that intercepts, inspects, and modifies network traffic in real-time, supporting HTTP, HTTPS, WebSocket, DNS, and generic TCP or UDP streams. By acting as a trusted certificate authority, the proxy can dynamically generate and sign certificates to decrypt and analyze secure TLS-encrypted connections. The project distinguishes itself through a highly extensible, event-driven architecture that allows users to automate traffic transformation using cust

This repository provides configuration sets for the Quantumult X network proxy client. It consists of routing rules, policy groups, and script rewrites designed to manage network connectivity and automation. The project features a network traffic router that uses rules and regular expressions to direct traffic toward specific proxy servers based on destination. It includes an HTTP request rewriter to modify network requests and responses to customize application behavior or bypass restrictions. The configuration covers automated task scripts for the maintenance of external web services, regi

Ladder is a web proxy server and HTTP response modifier designed to circumvent bot protections, CORS restrictions, and paywalls. It functions by intercepting traffic to modify HTML, CSS, and JavaScript via regular expressions and altering HTTP headers to reveal restricted content. The project distinguishes itself through its ability to bypass anti-scraping mechanisms and specialized bot detection, such as Cloudflare, by integrating with external challenge-solving services. It also enables client identity emulation by spoofing user agents and network identifiers to masquerade as different brow

Dev-sidecar is a local HTTP proxy tool designed to optimize development environments by intercepting and modifying network traffic. It functions as a man-in-the-middle service that routes outgoing requests through custom endpoints, enabling developers to accelerate access to remote services, manage package registry connections, and bypass regional connectivity restrictions. The tool distinguishes itself through its ability to perform dynamic DNS resolution overrides and certificate-based traffic inspection, allowing for granular control over network paths and secure data analysis. It employs

This project is a Node.js HTTP proxy server that enables cross-domain API requests from browsers by injecting Cross-Origin Resource Sharing headers into HTTP responses. It functions as a reverse proxy gateway and header manipulator, allowing for the interception and modification of traffic between a client and a target server. The proxy provides mechanisms to bypass browser same-origin policy restrictions through automated header injection. It includes capabilities for origin-based rate limiting and request interception to control traffic flow and prevent unauthorized usage of the proxy servi

DnsServer is a recursive and authoritative DNS server that provides domain name resolution and zone hosting. It functions as both a recursive resolver, performing iterative lookups across the internet, and an authoritative manager for primary and secondary DNS zones. The system distinguishes itself through high-availability clustering and a programmable HTTP API for automating server configurations and bulk record management. It supports a wide range of encrypted transport protocols, including TLS, HTTPS, and QUIC, and allows for custom functionality via a plugin-based request interception fr

Hono is a minimal JavaScript HTTP framework designed for building web servers across multiple runtimes, including Node.js, edge runtimes, and serverless platforms. It functions as a cross-runtime web server and a web standard API wrapper, normalizing various runtime request and response objects into standard Web API signatures. The project serves as an HTTP middleware orchestrator and request handler, utilizing a middleware-based request pipeline and hierarchical route mounting to create modular server structures. It distinguishes itself through a runtime-agnostic event wrapper that ensures c

This project is a proxy server designed to intercept and modify HTTP and HTTPS traffic for Netease Cloud Music. It functions as network middleware to restore playback for songs and albums restricted by geographic regions and to unlock premium account features, such as high-fidelity audio. The server utilizes header-based privilege injection to spoof premium status and employs conditional content redirection to route requests for unavailable media to alternative source providers. It also incorporates upstream proxy routing and IP parameters to bypass regional access restrictions. Additional c

HttpKernel is the core kernel component of the Symfony framework that orchestrates the complete HTTP request-response lifecycle. It provides an event-driven pipeline that converts an incoming HTTP request into a matching response by dispatching lifecycle events for early interception, controller resolution, error handling, response modification, and deferred tasks. The kernel automatically resolves the PHP callable that handles a request and injects its arguments using reflection and request attributes. It dispatches attribute-specific events for each PHP attribute found on a controller, enab

Rack-attack is a middleware rate limiter and request filter for the Rack interface. It provides a system for throttling HTTP requests and maintaining IP address blocklists to protect applications from malicious traffic and denial-of-service attacks. The project enables application layer DDoS mitigation and API rate limit management by identifying and rejecting requests from banned clients or abusive IP addresses. It allows for the definition of safelists to bypass filters and uses custom logic to determine if a client should be blocked or throttled. The tool covers comprehensive traffic mana

proxyee-down is an HTTP proxy download manager and multi-threaded download client. It is designed to route file download requests through an HTTP proxy server to accelerate data retrieval and bypass network restrictions. The tool increases transfer speeds by splitting large files into smaller chunks and downloading them concurrently across multiple TCP connections. It features the ability to update expired or changed source URLs for existing tasks, allowing interrupted downloads to recover and resume without losing previously downloaded segments. The system provides controls for manual downl

Tinyproxy is a lightweight HTTP and HTTPS proxy daemon designed for POSIX operating systems. It functions as a system-level network proxy that manages web traffic with minimal resource overhead. The project supports multiple routing modes, including reverse proxying to forward requests to backend servers and transparent proxying to intercept network traffic without client-side configuration. It also includes a header filter to modify or block specific HTTP headers for privacy and security. The software incorporates network access control based on client subnets and protocol filtering. For sy

node-ws is a lightweight proxy server implementation that supports both VLESS and Trojan protocols without requiring a kernel, making it suitable for serverless environments. The project enables running a dual-protocol proxy service that can be deployed on web hosting panels with Node.js support. The proxy service can be configured to expose subscription links at configurable paths, allowing clients to retrieve connection details for proxy nodes. It supports deployment on DirectAdmin and other web hosting panels through environment variable configuration for UUID, port, and domain settings.

This project is a Node.js HTTP reverse proxy middleware designed to route incoming HTTP and WebSocket traffic to target backend services. It functions as a dynamic routing engine and API gateway tool, providing the capability to consolidate multiple backend services behind a single entry point. The middleware features a WebSocket proxy bridge that manages protocol upgrade handshakes to maintain persistent bidirectional communication. It also includes a request and response transformer used to intercept and modify headers, bodies, and URL paths during transit. The system provides broad traffi

nodejs-argo is a Node.js network proxy server designed to route network traffic and manage secure communication tunnels across various protocols. It functions as a cloud proxy tunnel that exposes local services to the public internet and includes a subscription manager for generating and distributing connection configuration links to clients. The system integrates a network service monitor to track the operational status and performance of services via external monitoring panels. It also utilizes endpoint-based configuration distribution to provide connection settings and authentication detai

httptap is a network utility for intercepting system-level packets and monitoring the HTTP and HTTPS traffic of Linux processes. It functions as a network packet sniffer and traffic monitor designed to capture and display real-time requests and responses sent by local applications. The project includes a local traffic redirector that maps remote hostnames or IP addresses to localhost for service testing. To support detailed inspection, it features a TLS termination proxy for decrypting HTTPS traffic and a HAR file exporter that dumps captured data into the standard HTTP Archive format for ext

electron-ssr-backup is a cross-platform Electron desktop application that serves as a ShadowsocksR proxy client and system network manager. It acts as a proxy server orchestrator, allowing users to route network traffic through specific servers and automate operating system proxy configurations. The application enables the import and organization of proxy server lists via subscription URLs, QR codes, manual configuration files, or clipboard pasting. It includes a synchronization mechanism to fetch and update server databases from remote URLs. The software provides controls for toggling betwe

This project is a Go-based HTTP proxy server designed as a censorship circumvention tool. It functions as an upstream proxy manager and SOCKS5 tunneling gateway that routes network traffic between clients and destination servers to bypass network restrictions. The system differentiates itself through automated proxy routing, which detects unreachable websites and automatically switches traffic between direct access and a pool of parent proxies. It includes a PAC file generator to produce proxy auto-config files for browsers and integrates SSH tunneling to establish secure remote sockets. Bro

jsproxy is a web traffic proxy designed to route requests through a ServiceWorker to bypass network restrictions while minimizing server-side processing overhead. It focuses on browser API virtualization, rewriting URL-related functions and properties so that proxied pages behave as if they are running on their original domains. The project utilizes a decoupled architecture that separates the static user interface from the data forwarding backend, allowing for deployment across multiple providers. It includes weight-based load balancing to distribute traffic across multiple proxy nodes and im

3proxy is a multi-protocol proxy server and network access control gateway. It functions as a network traffic forwarder capable of routing TCP and UDP traffic across HTTP, SOCKS, and various email and file protocols. The project provides specialized capabilities for secure traffic inspection, including the decryption and analysis of HTTPS and TLS streams through certificate spoofing and mutual authentication. It further supports client identity anonymization by routing outbound traffic through recursive upstream proxy chains. The software covers a broad range of network management functions,

The Swift OpenAPI Generator is a build-time tool that produces type-safe Swift client and server code directly from OpenAPI specification documents. By integrating with build systems through native plugins, it automates the creation of strongly-typed interfaces and protocol stubs that map network operations to native methods, ensuring that application code remains strictly consistent with defined data schemas. The project distinguishes itself through a protocol-oriented architecture that decouples business logic from specific transport implementations. It utilizes a pluggable transport layer

Headroom is an AI gateway proxy and token optimizer designed to reduce the cost and latency of large language model interactions. It functions as an intermediary that intercepts traffic between clients and providers to apply context compression, request routing, and format translation. The system differentiates itself through a Model Context Protocol server implementation that delivers compression and retrieval tools to compatible AI hosts. It employs a content-aware compression pipeline and tiered importance scoring to trim redundant data from logs and tool outputs while preserving essential