DevPeek documentation

Current-product guides organized as Get started, Capture & debug, and Rules & collaboration. They cover HTTP(S), param transform, forward rules, Mock, WebSocket sessions and WS Flow, Android QR pairing and transfer, and local MCP.

Back to home for the installer.

Browse by topic

• Quick startA guided first run: install, phone proxy setup, SSL certificate, first capture, and mobile web debugging.
• Install & preferencesWindows / macOS (Apple Silicon and Intel) installers, language & theme, proxy port, auto-update and changelog entry points.
• Proxy & HTTPS / certificatesSystem proxy, SSL include/exclude rules, certificates, and throttling—the shared foundation for HTTPS plaintext.
• Android companionPair to the desktop proxy by QR, capture through VPN, install the CA, and transfer text, images, and files.
• Capture UI & requestsClient tabs, pins, multi-column sorting, content filters, details, previews, copy actions, and Debug API.
• WebSocket sessionsInspect WS/WSS handshakes and frames, search, simulate, intercept text frames, export HAR, and use WS Flow.
• Param transformEncrypt/decrypt config and transform rules; Mock, Debug API, and details default to plaintext with auto encrypt on send.
• Map Route / ForwardStacked configs and remote hosts subscriptions that point production hosts at local or staging upstreams.
• Mock/BreakpointVisual manual & auto Mock, multiple enabled rules, request/response intercept and tamper.
• WebSocket MockThe available long-connection Mock: single-file rules, virtual server behavior, scopes, and a minimal example.
• Mobile web debuggingProxy & SSL prerequisites, mirror phone web, DevPeek built-in debug panels & throttling; Chromium extension for PC.
• LAN collaborationDiscover peers, add notes, and send captures, debug recordings, or a checked configuration.
• MCP integrationTurn on local MCP so Cursor and similar tools can search captures and edit Mock plus selected settings.
• FAQPlatform support, debug page won’t connect to phone, CSP vs preview, auto-update, and more.

Language reference

• .dpws / Flow DSLReference by chapter: headers, conditions, scope, errors, and more.

Main UI at a glance

The main-window title bar switches between Capture and Debug. Proxy manages recording, SSL, throttling, and rules; View switches pages and right-side panels; Settings covers preferences, certificates, recordings, and config transfer; About contains versions and help. The right rail opens Phone, Collaboration, Mock, WS Flow, Forward, and History; Record & replay opens from History.

• Capture: tabs per client; pin and sort by status, method, host, path, size, time, or duration; filter by content and response body; expand WebSocket connections below the list.
• Debug: mobile HTML over the proxy—after proxy and SSL setup, mirror in DevPeek with built-in debug panels (not browser DevTools).
• Recordings & replay: export debug recordings as JSON, send them to a peer, or replay the timeline in a separate window.

Decrypt HTTPS only where you are authorized—never use this on traffic you do not own or have permission to inspect.