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TestTau
MAIL · HOOKS
Tau-marked testing tools

Test inboxes and webhooks without the cleanup.

Open a public inbox or webhook instantly for QA, CI, and signup flows. Sign in when a test surface needs privacy, API keys, and account-owned captures.

Start public, upgrade to private when the test needs a key
Open mail inbox Inspect webhook Create private mail key
No signup for public tools. Sign in for private inboxes, private hooks, and bearer-token APIs.
Start free
ipvhr9jg@mail.testtau.com
https://hook.testtau.com/v4ucguhw5r
https://mail.testtau.com/private/i/<inbox>
48hretention
5 MiBattachments
Liveinspectors
Choose the right surface
Public by name
Anyone with the inbox or hook name can inspect it. Perfect for fast public checks.
Private with keys
Signed-in users get one private inbox and one private hook protected by bearer tokens.
Team plans next
Low-cost paid plans add higher limits, longer retention, and team ownership.
Use it where tests already run

Recipes for QA, CI, and AI agents.

TestTau is easiest to adopt when it drops into an existing automation flow: wait for a signup email, assert a webhook arrived, or give an agent a safe test surface.

Use cases Agent docs

Playwright signup email

Use a unique inbox for each run, trigger signup, then wait for the verification email from the test.

const inbox = `qa-${crypto.randomUUID().slice(0, 8)}`;
await page.fill('input[type=email]', `${inbox}@mail.testtau.com`);
const msg = await fetch(
  `https://mail.testtau.com/i/${inbox}/api/wait?timeout=15000&subject=Verify`
).then((r) => r.json());

Webhook CI gate

Capture requests from Stripe, Clerk, GitHub, or your own app and fail CI when the expected event never arrives.

HOOK_ADMIN_TOKEN="$(curl -fsS -X POST "https://hook.testtau.com/_/v4ucguhw5r/api/admin-token" | jq -r .token)"
START=$(date +%s%3N)
# trigger the system under test
curl -fsS -H "Authorization: Bearer $HOOK_ADMIN_TOKEN" \
  "https://hook.testtau.com/_/v4ucguhw5r/api/assert?since=$START&min_count=1"

AI agent skill

Point coding agents at the hosted skill so they can create inboxes, wait for email, and inspect hooks without custom prompting.

Skill: https://testtau.com/skills/testtau/SKILL.md
Index: https://testtau.com/llms.txt
HF: testtau/testtau-agent-skill