Your old phone becomes your own SMS server · free forever, end-to-end encrypted
You already pay for a SIM that sends texts — httpSMS turns it into a free, encrypted SMS API, no Twilio, no per-message fee, no rented number.
digraph G {
rankdir=TB;
bgcolor="transparent";
node [shape=box, style="rounded,filled", fontsize=16, color="#1b4332", fillcolor="#e9f5ef", fontcolor="#1b4332"];
edge [color="#e07a5f", fontsize=13, fontcolor="#e07a5f"];
phone [label="📱 spare phone\n🔐 AES-256"];
api [label="🌐 httpSMS API"];
apps [label="🧩 your apps"];
sheet [label="📊 spreadsheet"];
monitor [label="🔔 monitoring"];
phone -> api;
api -> apps;
api -> sheet;
api -> monitor;
}
| feature | what it means |
|---|---|
| $0 · 200 SMS/mo | free hosted tier, no card |
| self-host Docker | unlimited, fully yours |
| AES-256 end-to-end | server never reads your texts |
| webhook forward | inbound SMS reaches your apps |
| back-pressure rate limit | queue never overflows |
| bulk 1,000 CSV | blast from a spreadsheet, no code |
Zero self-host — browser to Zapier in four steps
- apk.httpsms.com → install the app, send from the browser or a CSV
- zapier.com native app → send SMS when a new row or order lands
- healthchecks.io → paste one URL, a missed ping texts your phone
- phone-leash.com → codes and calls follow you to email / Telegram
Your old Android just earned its keep — a private, programmable phone number you fully own. 
!