Works with the AI tools you already use
Testing With Sandbox
Safely capture and inspect test emails in a staging environment without sending to real recipients.
Free
See it in action
You say
Show me how to configure my Node.js app to send test emails to my Mailtrap sandbox inbox #123456.
Your agent does
Install the mailtrap package, then use the following config:
const { MailtrapClient } = require("mailtrap");
const client = new MailtrapClient({
token: process.env.MAILTRAP_SANDBOX_TOKEN,
testInboxId: 123456,
});
Note: Ensure you use the Sandbox-specific API token.
About this skill
Teaches agents to route outbound mail into a Mailtrap Email Sandbox (test inbox) so nothing reaches real recipients during development, staging, or CI. Covers both the HTTP Testing API (sandbox.api.mailtrap.io) and SMTP approach, how to obtain and use inbox_id, the separate sandbox token scope, and how to read and assert on captured messages via the Sandbox API. Includes SDK guidance and a common-mistakes table.
How to install
Drop the file into your AI Agent. Works with Claude, Cursor, ChatGPT, and 20+ more.
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