Description

Capture, inspect, and replay HTTP/HTTPS traffic from browsers, desktop apps, and AI agents without changing proxy settings.

Capture traffic system-wide

See HTTP and HTTPS requests from browsers, desktop apps, services, Java and .NET clients, and local servers without changing proxy settings.

• Inspect modern API calls

  View headers, bodies, cookies, JSON/XML, HTTP/2 details, WebSocket frames, Server-Sent Events, and gRPC messages.

• Debug

  Replay and modify requests

  Edit and resend HTTP sessions, simulate server responses, rewrite HTTP headers, and redirect TCP connections.

Inspect the streams that power AI agents and copilots

Agentic apps rarely behave as a single clean request. They stream model output, tool calls, progress events, and backend responses over WebSocket, Server-Sent Events, gRPC, and HTTP/2. HTTP Debugger captures and analyzes those streams from the real Windows process that sends them.

WebSocket, Server-Sent Events, and gRPC

Inspect every frame, message, and event with full metadata — direction, offset, type, byte size, WebSocket masking and compression, and the decoded payload. Everything is captured to disk for later replay or analysis.

MCP server for AI assistants

HTTP Debugger ships an MCP server. Claude Code, Codex, and other MCP clients read the captured session and analyze it for you.

• Find the request behind a failure
• Debug without leaving the IDE
• Match traffic to your code
• Ask in plain language

Modify and replay traffic

Edit traffic without touching code. Replay any request with the Submitter to see how the server reacts, or simulate server responses with Auto-Reply and Modify Headers to test how the client handles errors and edge cases.

Filter captured traffic

Two layers of filtering keep the view focused. Quick filters narrow the grid on the fly; filter rules block noise from system services and other applications before it ever reaches the UI.

Highlight rules

HTTP Debugger automatically highlights errors, slow requests, and oversized responses. Add your own rules to highlight the requests and responses you care about, and choose whether to color just the matched cell or the entire row.

Session overviews

Session-wide charts aggregate captured traffic by host, content type, response size, and response time — understand your traffic patterns and spot optimization opportunities.

Group requests by domain and path

HTTP Debugger automatically organizes captured traffic into a domain-and-path tree, tallying request counts and total bytes per node — allowing you to understand the internal structure of your traffic at a glance.

Context menu actions

All important operations are one right-click away — act on any captured request directly from its row, without navigating menus or opening dialogs.

• Copy & bookmark requests
• Filter out or highlight similar requests
• Modify or auto-reply specific server responses
• Switch to HTTP/2 connection tree view
• Edit & submit request back to server
• Save captured content to disk

Dark and light themes

Pick the theme that fits you. Use the dark theme for long debugging sessions and OLED displays, or light for screenshots, screen sharing, and bright environments.

Additional Information