DevPeek

Local HTTP(S) capture · Mock · API debugging

DevPeek

Traffic from phones, browsers, and test apps enters separate client tabs, with headers, bodies, status, and timing in one place.

Decrypt business parameters by rule; edit plaintext in Mock or resend, then automatically restore ciphertext before sending.

Local features are free forever, and captures stay on your machine.

Getting startedinstall guide

Watch first: find one request in the traffic

Separate phones, browsers, and test apps by client, then combine protocol, method, and keyword filters. Once found, inspect the request, create a Mock, or edit and resend it.

Demo

Filter captures, inspect details, and resend

Use client tabs, protocol and method filters, and keyword search to locate a request, inspect its details, and continue with resend debugging.

Read the capture and request resend guide →

Keep capture and debugging in one workspace

Built around a local HTTP(S) proxy, DevPeek connects request discovery, plaintext parameter transforms, precise Mock, and resend in one flow.

  • Capture and inspect

    Separate traffic by client, then find and understand each request

    • Separate tabs for phones, browsers, and test apps; inspect decrypted HTTPS headers, bodies, status, and timing together.
    • Search URL, method, and host—or response bodies—with regex and case options to locate requests in long lists.

  • Parameter transforms

    Decrypt on match, then edit Mock and resend in plaintext

    • Conversion configs define the algorithm; transform rules pick the request and field. Details show decrypted values without changing the original capture.
    • Mock and Debug API match and edit in plaintext. With re-encrypt enabled on a reversible algorithm, DevPeek writes ciphertext back on send or continue.

  • Precise Mock

    Start from a real request and pick match features in a guided UI

    • Right-click a request to select method, host, path, query, body, headers, or decrypted JSON fields as match conditions.
    • Manual Mock pauses for in-place tamper; auto Mock applies presets. Response-only auto Mock can short-circuit without hitting the real server.

  • Request resend

    Capture, edit in plaintext, and send in the original wire format

    • Open Debug API from details or the context menu with method, URL, query, body, and headers already filled—no external copy and paste.
    • Fields bound to transform rules stay editable in plaintext and re-encrypt on send. Compare status, timing, and body in place, with send history kept.

Your first capture in three steps

  1. 1

    Point the phone at DevPeek’s proxy

    Install DevPeek for Windows or the matching macOS chip architecture and note the listen port; set the phone’s Wi‑Fi proxy to your PC’s LAN IP and port (local browsers can use the system proxy).

  2. 2

    Trust the CA and see HTTPS plaintext

    Install and trust the DevPeek root CA on the test device, then add target hosts to SSL decrypt scope. Use the client tab and filters to find your first target request.

  3. 3

    Create a Mock or resend the real request

    Open the Mock wizard from a request and select the parameters that must match, or use Debug API to edit query and body values in plaintext, automatically re-encrypt them, send, and inspect the response.