In public beta

Programmable email inboxes for testing OTPs, signup flows, and AI agents.

Catch one-time codes from any service in real-time. Skip the disposable-inbox hassle. Start free, scale to teams.

Start free View pricing

No credit card required
Free forever tier
Available via API, CLI, MCP

Built for developers

The primitives you actually need.

We boiled email-testing down to three things: create, wait, parse. Everything else is in your way.

Programmable

REST API, CLI, and Node/Python/Go SDKs. Create inboxes in milliseconds; receive structured JSON when mail arrives.

Real-time waiters

Block your test until the OTP arrives. No polling loops, no flaky waits. p95 latency under 1s end-to-end.

OTP auto-extracted

We parse the code from the email body for you. Works with 95%+ of major services out of the box.

Quickstart

Catch your first OTP in 60 seconds.

One API key. Three lines of code. Same shape across Node, Python, and curl.

import { CatchOTP } from '@catchotp/sdk';
const client = new CatchOTP({ apiKey: process.env.CATCHOTP_KEY });

const inbox = await client.inboxes.create({ mode: 'ephemeral', ttlMinutes: 10 });
// → use inbox.address as the email when signing up to the service under test

const otp = await client.inboxes.waitForOtp(inbox.id, { timeoutSeconds: 30 });
console.log(otp); // → "123456"

from catchotp import CatchOTP
client = CatchOTP(api_key=os.environ["CATCHOTP_KEY"])

inbox = client.inboxes.create(mode="ephemeral", ttl_minutes=10)
otp = client.inboxes.wait_for_otp(inbox.id, timeout_seconds=30)
print(otp)  # → "123456"

curl -X POST https://api.catchotp.com/v1/inboxes \
  -H "Authorization: Bearer $CATCHOTP_KEY" \
  -d '{"mode":"ephemeral","ttlMinutes":10}'

Tip: pair with @catchotp/cypress or @catchotp/playwright for zero-boilerplate tests.

Use cases

From CI pipelines to autonomous agents.

OTP testing

Cypress, Playwright, Jest, pytest. Drop-in helpers for your test runner.

E2E signup flows

Spin up disposable inboxes per test run. Verify signup, confirmation, and recovery emails end-to-end.

AI agent email handling

MCP-compatible. Agents can list inboxes, read messages, and act on email content as a tool.

Burner addresses

Privacy-first signups for free trials and gated content without exposing personal email.

Start receiving emails in 60 seconds.

No credit card. Free forever tier. Upgrade when you outgrow it.

Get free API key See pricing