Inbox routing
Catch-all addressing
Use one-off addresses per test run and keep scenarios fully isolated.
Early access for teams building email-heavy products
Email testing that fits directly into your developer workflow.
Capture every test message, inspect the raw payload, and assert on delivery flows without spinning up SMTP infrastructure or leaking messages into real inboxes.
REST-first List, inspect, patch, and delete emails over JSON.
Catch-all Send to any address at mailtestapi.com.
Edge-ready Runs on Cloudflare for low-friction delivery.
# Fetch the latest captured email
curl https://api.mailtestapi.com/v1/emails?limit=1 \
-H "Authorization: Bearer $API_KEY"
# Response
{
"items": [{
"id": "a1b2c3d4-...",
"sender": "noreply@yourapp.com",
"recipient": "signup-42@mailtestapi.com",
"subject": "Verify your email",
"status": "received",
"receivedAt": "2026-04-17T19:00:00Z"
}]
}MailTestAPI gives you fast read access to the exact message your app generated.
Payload access
Raw MIME + parsed bodies
Inspect headers, HTML, plain text, and attachment metadata without guesswork.
Automation
Built for CI and local tests
Assert on verification emails, password resets, and notifications with the same API.
Why teams use MailTestAPI
Everything you need to test email flows without side quests.
The core product is small on purpose: capture messages reliably, inspect them deeply, and make your tests deterministic.
Catch-all inboxes
Send to any address at mailtestapi.com and capture messages automatically, with no mailbox provisioning or routing setup.
REST API for every step
Create, list, inspect, annotate, and remove emails through predictable JSON endpoints that work well in scripts and test suites.
Full message inspection
Read parsed HTML, plain text, raw MIME, headers, and attachment metadata when you need to debug the exact shape of a message.
Labels and notes
Organize captured emails with notes and metadata so QA runs, support reproductions, and regression checks stay easy to revisit.
Scoped API key auth
Authenticate with Bearer tokens or X-API-Key headers and keep access isolated per account or team workflow.
OpenAPI-based integrations
Generate clients from the published schema and plug MailTestAPI into any stack without a custom wrapper.
How it works
From setup to assertions in three short steps.
MailTestAPI stays out of your way: get a key, send a message to a catch-all address, then assert on the result over HTTP.
Create an API key
Sign in to the dashboard, generate a key, and keep it scoped to the workflow or environment you want to test.
Send your test email
Point your app or test harness at any address ending in @mailtestapi.com and MailTestAPI captures the message automatically.
Query and assert
Fetch the latest message, inspect the body or headers, and assert on the exact content your users would receive.
API surface
A compact API that stays predictable under test.
The landing page is simple because the product is simple. Everything is JSON, the endpoints are obvious, and the payloads are made for automation.
/v1/emails List and filter captured emails
/v1/emails Create a message through the API
/v1/emails/:id Read full email details and content
/v1/emails/:id Update notes and metadata
/v1/emails/:id Remove captured test data
const response = await fetch(
"https://api.mailtestapi.com/v1/emails?recipient=user-42@mailtestapi.com&limit=1",
{
headers: {
Authorization: `Bearer ${process.env.MAILTESTAPI_KEY}`,
},
},
);
const { items } = await response.json();
expect(items[0].subject).toBe("Verify your email");Use the same request shape in a local test run, CI job, or quick debugging script.
Pricing
Simple now, with room to grow later.
Free while MailTestAPI is in early access. Paid plans are reserved for team workflows and higher-volume automation.
Free
$0
During early access
- Unlimited test emails
- Full REST API access
- One API key
- Seven-day retention
Pro
Soon
For teams and CI pipelines
- Everything in Free
- Multiple API keys
- Webhooks
- Thirty-day retention
Ready to stop guessing about transactional email?
Capture test messages in minutes and keep your assertions honest.
Start with the free early-access tier, generate an API key, and wire MailTestAPI into your next signup, password reset, or notification flow.