MailHelper — Let AI agents send physical letters

Give agents a 10-line API to mail credit-card disputes, gym cancellations and lease notices.

Problem

One of the most tedious parts of managing personal life is the occasional need to mail a physical letter: card disputes, credit bureau disputes, gym cancellations, lease termination notices. Someone already built a product so their agents could do this for them, which proves ordinary developers and power users face a real gap when AI can write a letter but cannot post it.

Solution

An API plus a thin UI for agent developers and automation power users: accept structured letter fields, render a reviewable PDF, then submit to a partner print-and-mail service. Supports registered mail, return receipt, delivery webhooks and a template library for common scenarios like disputes and cancellations. No consumer brand operations required.

Users

Developers building personal-automation tools, and power users running their own agents for life admin.

MVP

REST endpoint accepting recipient, body and attachments; returns a reviewable PDF for the caller to confirm; submits standard letters through one print-and-mail partner; provides delivery webhooks; ships with three common-scenario templates.

Revenue

Per-letter pricing with a 15–25% markup over print and postage cost; developers prepay with an API key balance.

Why now

Agents can now draft complete letters but stop at 'cannot mail'. This is a rare physical-world gap in the automation chain that one person can bridge with an API and a single vendor.