🏆 Startup in One Day · AWS Builder Loft, SF · Sep 18, 2026

One day, one idea: an AI that phones dental patients and books their cleaning.

Meet Ava. The real call, how she works, and every step of the build.

See the full build (free) Watch the real call
A real call, not a mock-up. Ava phones me, checks who I am, answers an insurance question from my record, and books a cleaning. My Friday request lands on the waitlist.

Why this project

We forgot to book one cleaning

Our insurance covers three cleanings a year for my 5-year-old. We forgot to book one, the next open time was weeks out, and at the next visit the dentist found a cavity. Why didn't the office just call us?

Covered, then unused

Most plans cover three cleanings a year. Most patients use one or two.

Nobody has time to call

Everyone knows those calls should happen. The front desk is busy with the patients in the room.

Money left on the table

Every cleaning that never gets booked is a visit the office never gets paid for.

How it works

Speech in, tools on our server, speech out

The model does the talking. Our backend owns the schedule, and every action Ava takes goes through it.

Patient's phone An ordinary call, no app to install Twilio Dials out, streams the call audio Our backend Bridges the audio Runs every tool: slots, booking, waitlist, notes Verify first, real slots only Higgs Realtime by Boson AI: listens, speaks, decides which tool to call audio tool calls G.711 μ-law end to end · no resampling
The model never touches the schedule directly. It asks, and the backend decides whether that is allowed.

Progress

From idea to product

Everything above the line happened in one day. The rest is what it takes to put Ava in a real practice.

The day

Startup in One Day

A one-day hackathon at the AWS Builder Loft in San Francisco, with Boson AI's Higgs Realtime as the voice engine. We pitched Ava on stage and went home with a prize.

Photos from the Startup in One Day hackathon at the AWS Builder Loft in San Francisco: the team on stage, the prize, and the venue.

Do it yourself

The build, step by step

Three phases, in the order we built them, with the code open source at the end.

    🛡️ Rules we built in before the first real call

    Free for members

    The pitch decks

    The 3-minute pitch I gave on stage and the full 12-slide deck. Free account, no card.

    Free community

    Build your own agent

    This is the kind of thing we build together: one real problem, one agent that fixes it, shipped fast. Join free to get the full build and every new project as it lands.