Mailsac API

⭐ Beginner's Pick Test Data / API Key Intermediate HTTPS
Varies by plan (check documentation)

Overview

Mailsac lets you create disposable email addresses and read incoming messages via API — ideal for testing email-sending features in your app. You can check any @mailsac.com inbox without creating an account first. Use an API key for higher rate limits and private inboxes.

💡

Beginner Tip

Public @mailsac.com inboxes are readable by anyone who knows the address, so never use them for sensitive data. For private inboxes, use a paid plan and set a custom address.

Available Data

email delivery status
message ID
bounce/complaint data
open/click tracking
Use case: Integrate disposable email data into web and mobile applications

Example Response

JSON Response
{
  "message_id": "msg_abc123def456",
  "status": "delivered",
  "to": "[email protected]",
  "subject": "Welcome!",
  "timestamp": "2025-01-15T10:30:00Z"
}

Field Reference

_id Unique message identifier
inbox Email address of the inbox
subject Subject line of the email
from Sender address objects
received ISO 8601 timestamp when the message was received
size Message size in bytes

Implementation Example

// ⚠️ Note: This URL may be a documentation page. Check official docs for actual API endpoint.
const url = "https://mailsac.com/docs/api";
// Replace headers or query params with the values required by this API.
const response = await fetch(url, {
  headers: {
  "X-API-Key": "YOUR_API_KEY"
  }
});
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data);

What Can You Build?

Note: These code examples are AI-generated and unverified. Always refer to the official API documentation for accurate usage.

Common Errors & Troubleshooting

401 Unauthorized Missing or invalid Mailsac-Key header
Add -H "Mailsac-Key: YOUR_API_KEY" to your request; get your key from mailsac.com/api-keys
Empty messages array No emails have arrived yet at that address
Send a test email to the address first, then poll the messages endpoint
429 Too Many Requests Exceeded rate limit on free tier
Add delays between requests or upgrade to a paid plan for higher limits

Matrix Score Breakdown

🌐 Reachability 30/30
⚡ Speed 10/20
🔒 Security 15/15
🛠 Developer XP 12/20
✓ Reliability 10/15

Partially tested on Apr 5, 2026

Technical Specifications

Auth API Key
HTTPS REQUIRED
CORS UNKNOWN
Category Test Data
Difficulty Intermediate
Verified: 2026-04-04

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