The hard part of capture was never the ordinary cases — it’s pinned certs, proxy-blind apps, HTTP/3, private protocols, and the like. Here’s what Trace Eagle can do.
Many apps only trust their own bundled cert. Swap in a proxy cert and the app spots it instantly and errors out, so nothing decrypts.
It never swaps the cert. It reads plaintext from inside the app instead, so even strict pinning doesn’t stop it.
Some apps ignore the system proxy entirely. Set one and they still won’t route through it, so proxy tools capture nothing.
Capture at the NIC instead. Whether or not the app respects a proxy, the traffic is there, and it’s decrypted automatically.
More services run HTTP/3 over UDP with a different handshake, and old proxies and capture-only sniffers can’t handle it.
Downgrade-capture, high-fidelity passthrough, or true H3 decryption, so QUIC traffic shows in plaintext.
Android 7+ stopped trusting user certs, and Android 14 moved the system store somewhere you can’t write, so installing a cert keeps getting harder.
Several cert-free capture methods: iOS without a jailbreak, Android without installing a cert.
These ship their own trust store and ignore the cert you added to the system, so ordinary proxies still can’t decrypt.
Read plaintext from inside the process; the system trust store is irrelevant.
A custom binary protocol comes through as raw bytes with no visible structure, and ordinary tools just stare at it.
Write a short script to declare the framing and it’s restored to structured fields, frame by frame.
System apps and deeply buried processes block the proxy and in-app reads alike, leaving only ciphertext on the wire.
System-level capture reads plaintext from below, reaching what other tools can’t.
Capture is just step one — the things you do all day: rewrite, diff, replay, load-test, look up a server, can all be done inside the tool.
Set a breakpoint on a request: catch it mid-flight, edit and release it or drop it, and watch the server react on the spot.
Change requests and responses without touching code: forward, map to local, mock data, edit headers and bodies, for integration and edge-case testing.
Hand-build or edit any request and send it; dynamic values recompute signatures and timestamps, so signed APIs replay for real.
Replay a batch of requests in order, or right-click one to load-test it: QPS, concurrency and honest p99 tail latency.
Put two requests or responses side by side; where one succeeds and one fails, the difference is highlighted at a glance.
For private or in-house binary protocols, a short script declares the framing and it’s restored to readable, structured fields.
JSON, forms and gRPC are recognized and beautified; gzip, brotli and chunked encoding unpack instantly, so gibberish becomes readable.
Click a host for ownership, location, an A–F cert grade and tech stack: everything beyond just an IP and a domain, in one place.
Turn a request into cURL, Python, Go and more; turn a whole session into an OpenAPI spec, with HAR import and export.
Network diagnostics, a connection table with process attribution, port scanning, subdomain discovery, DNS-leak checks and TLS audits, always on hand.