plop.emailplop.email
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Email Testing API
for developers.

Send emails to Plop, fetch via API, assert in tests. No mail server. No flaky waits.

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✓ 14-day free trial✓ No credit card✓ Setup in 2 minutes
Email in → JSON outLive demo
1Generate a test address
<inbox>+<tag>@in.plop.email
2Email arrives
✉
Confirm your email
Code: 482913
3Fetch via API
{
  "subject": "Confirm your email",
  "text": "Your code is 482913",
  "from": "hello@acme.co"
}

Three steps to reliable email tests

No mail server setup. No flaky waits. Just a simple API.

01

Send to Plop

Use qa+signup@in.plop.email as your test user's email address.

02

Fetch via API

GET /v1/messages/latest returns the email as JSON instantly.

03

Assert in tests

Extract OTP codes, verify links, and check content.

Built for test automation

Everything you need to test email flows in CI.

Mailboxes + tags

Route flows with mailbox+tag addresses like qa+login@in.plop.email.

REST API

List, filter, and fetch emails. Poll for the latest message.

Scoped API keys

Full access, email-only, or mailbox-scoped keys.

Official SDKs

TypeScript and Python SDKs with built-in polling. One line to wait for emails.

Works with your test framework

Fetch emails, extract codes, assert content.

// TypeScript SDK — one line to wait for an email
import { Plop } from '@plop-email/sdk'

const plop = new Plop({ apiKey: process.env.PLOP_API_KEY })
const msg = await plop.waitFor({
  mailbox: 'qa',
  tag: 'login',
  timeout: 10_000,
})
const otp = msg.textContent?.match(/\b\d{6}\b/)?.[0]
await page.fill('[data-testid="otp-input"]', otp)
Open Source

Open source.
Open book.

Plop is fully open source under the AGPL-3.0 license. Inspect the code, self-host it, or contribute back. Your email testing infrastructure, your rules.

Star on GitHubRead the README

Full transparency

Audit every line. No black boxes, no hidden logic.

Community-driven

Contributions welcome. Shape the future of email testing.

Self-host friendly

Run on your own infrastructure. Full control, full ownership.

License:AGPL-3.0
Free for non-commercial use

Pricing that scales with your inboxes.

Start lightweight, then add mailboxes as you grow.

Starter

For solo developers and side projects.

$4/mo

Billed yearly ($48 / year)

or $5 billed monthly

  • 1 mailbox
  • 5,000 emails/month
  • 7-day retention
  • Unlimited tags
  • 1 API key
Start free trial
Popular

Team

For small teams and growing projects.

$15.17/mo

Billed yearly ($182 / year)

or $19 billed monthly

  • 5 mailboxes
  • 25,000 emails/month
  • 30-day retention
  • Webhooks
  • 5 team members
Start free trial

Pro

For growing companies with advanced needs.

$39.17/mo

Billed yearly ($470 / year)

or $49 billed monthly

  • 20 mailboxes
  • 100,000 emails/month
  • 90-day retention
  • 15 team members
  • Priority support
Start free trial

Enterprise

Coming soon

Custom domains and enterprise security.

Contact us
  • Custom subdomains
  • Unlimited mailboxes
  • SSO/SAML
  • Dedicated support
  • Custom retention

14-day free trial on all plans. No credit card required.

All plans include unlimited tags and API access. Save 20% with annual billing.