offline-first · tui · go

catch webhooks
locally.

A terminal webhook receiver that never phones home. Captures every request, replays any of them, and forgets about the internet entirely.

$ go install github.com/iamkorun/kowari@latest

copied ✓

kowari · :8080 → localhost:3000

$ kowari --target http://localhost:3000

listening on :8080 · replaying to localhost:3000

REQUESTS (4)

▸ POST /stripe 201 12ms

POST /github 200 08ms

POST /slack 200 05ms

POST /stripe 500 22ms

BODY · POST /stripe

{
  "id": "evt_1PzQ...",
  "type": "charge.succeeded",
  "data": {
    "object": {
      "amount": 4200,
      "currency": "usd"
    }
  }
}

[↑/↓] navigate · [r] replay · [c] clear · [q] quit

01 — offline

Every webhook stays on your machine. Your Stripe test events don't need to round-trip through someone else's SaaS to land in your dev server.

02 — fast

A single static Go binary. Point it at a target URL and start catching. No config files, no projects, no accounts.

03 — honest

Hit r and kowari re-sends the selected request to your local server. Perfect for "just reproduce the bug one more time".

in action

three flags you'll actually use

capture + replay

kowari \
  --port 8080 \
  --target \
  http://localhost:3000

Listens on :8080, shows the TUI, replays on r.

persist to disk

kowari \
  --save hooks.jsonl

Every captured request appended as JSONL. Diff fixtures against prod.

headless for ci

kowari \
  --headless \
  --save hooks.jsonl

No TUI, just capture. Useful in integration tests and automated runs.

compared

thing	kowari	webhook.site	ngrok inspect
requires account	no	yes	yes
works offline	yes	no	no
your bodies leave your box	never	always	always
one-key replay	yes	manual	manual
binary size	~8MB	—	~30MB