Built for developers and AI-assisted builders

Plan your test addresses once and let your AI coding assistant use them automatically. The Developers area in your DemoPost inbox turns your receiving prefix into a small, reusable kit: the addresses you need, a prompt your assistant understands, and a DEMOPOST.md file that keeps the rules inside your project.

What it does

Plan test addresses in seconds

Pick suggested roles (admin, billing, signup, password reset, test customers) or add your own, such as yourprefix+customer-janssens@in.demopost.net. Every address works right away, with no setup.

One address per scenario

Give each test customer, case or role its own address, so every flow stays separate and easy to check.

Instructions for your AI assistant

Copy a ready-made prompt for Lovable, Cursor, Claude or any other AI coding assistant, so it always uses your DemoPost test addresses instead of real ones.

A DEMOPOST.md file for your project

Download it or copy it, or let your AI create it with one prompt. Your test addresses and rules then live in your codebase.

Attachments included

Invoices, PDFs and other attachments sent to your test addresses can be read in your private DemoPost inbox.

How it works

1
Open Developers in your DemoPost inbox.
2
Choose or add the test addresses you need.
3
Copy the prompt or the DEMOPOST.md file into your project.

Good to know

You can use as many addresses as you like. Messages and storage count towards your plan limits.
DemoPost only receives email: it doesn't send or reply.
Available on every plan, including the 7-day free trial.

Plan your test addresses once

Start the 7-day trial, open Developers in your inbox and hand your AI assistant a prompt that always tests with DemoPost.

Start your 7-day trial See pricing

Try Email for 7 days. Then €19/month, excluding applicable tax. Cancel before your trial ends to avoid the subscription charge.