Rex turns phone → voicemail → AI processing into infrastructure you own: your Twilio number, your Anthropic key, your domain, your brand. Inbound calls become structured, triaged data. Triaged data becomes signed webhooks your product can act on.
No vendor lock-in — deploys to your own Netlify + Twilio + Anthropic accounts.
Three ways in
Every mode runs on the same self-hosted core: your phone lines, your triage rules, your delivery targets.
Every call hits your Twilio number, gets recorded and transcribed, and comes out the other side as JSON: intent, urgency, spam flag, extracted tasks, callback number.
Click-to-call dials out through your Twilio number with PIN-gated caller-ID control, optional recording, and AI notes on the bridged conversation.
Voicemail-to-AI-processing runs the moment a recording lands: transcription, spam filtering, task extraction, and delivery — all before your team even opens their phone.
Built for your backend
Every delivery carries an HMAC-SHA256 signature you can verify server-side before trusting the payload.
t=<unix_ts>,v1=<hmac_sha256> — verify against your configured signing secret before processing.
Structured urgency, spam classification, callback flag, and extracted tasks with names and numbers.
Signed, expiring playback link — no shared credentials, no public bucket.
Deep link back into the (white-labeled) inbox UI, for handoff from your product to Rex's review screen.
import { createHmac } from "node:crypto";
function verify(body, header, secret) {
const [t, v1] = header.split(",").map(s => s.split("=")[1]);
const expected = createHmac("sha256", secret)
.update(`${t}.${body}`)
.digest("hex");
return v1 === expected;
}Your brand, not ours
Every Rex instance is a separate deployment — your domain, your admin UI, your data. There's no "Rex" watermark for your customers to see.
Point your own domain at the deploy and every signed link, inbox URL, and admin page carries it — configured once in Settings.
No shared usage pool, no per-minute markup from us — you own the underlying accounts and their billing directly.
Owner name, greeting script, and triage instructions are configurable per phone line — one deployment can front several named teams.
Transcripts, recordings, and triage output live in a database you provision. Export or delete on your own terms.
Ship it today
$ git clone your-fork/rex && cd rex
# provisions Netlify + database, prints your setup secret
$ npm run setup:secret
Setup secret (use as 'invite_secret' at /admin.html):
7f2c9e1a4b6d8f0c2e4a6b8d0f2e4a6c
# open /admin.html, claim the instance, add a phone line
$ open https://your-brand.app/admin.htmlTell us what you're building — white-label reseller, internal tool, or a one-off deployment for your own team. We'll help you get the first call triaged.
We'll reply with setup help — no sales call required to try it yourself.