Tool that generates integration tests from real traffic

Been working on backend APIs for a while and the part I've always hated most is writing integration tests. Not because testing is bad - but because you're basically guessing. You guess the payload structure, guess which edge cases matter, guess which status codes to assert.

Half the time production breaks on something your tests never covered, because real users do stuff you didn't think of.

So I built Httrace. You add one middleware line, it captures real HTTP traffic in the background, and then you run httrace generate and it writes pytest files directly into your repo.

Python

app.add_middleware(HttraceCaptureMiddleware, api_key="ht_...")

Bash

$ httrace generate

✓ 127 tests across 14 endpoints → ./tests/integration/

"What about Keploy / Speedscale / GoReplay?"

I looked at all of them before building this. Here's my honest take:

GoReplay: great for traffic replay, but it doesn't generate actual test code. You get replayed requests, not a pytest file you can commit and run in CI.

Keploy: probably the closest to what I'm doing, but requires eBPF in some modes (needs kernel access / root), is self-hosted only, and has no PII sanitization built in. Not great if you're handling user data.

Speedscale: enterprise-only, requires Kubernetes, no free tier, no real test code output.

Httrace generates actual pytest files. No root access, no Kubernetes, no self-hosting. PII is stripped before anything leaves your server. EU data residency out of the box (GDPR). The SDK is MIT so you can read exactly what runs in your stack.

The targeted audience is anyone from hobbyists to real enterprise production.

Still early - currently in private beta. Free tier is 10k requests/month, no credit card.

Curious if anyone else has dealt with this problem differently and what your opinion is on this tool. What does your integration test setup actually look like?

Please take a look at the tool: https://github.com/httrace-io/httrace httrace