Northline.Site visits
Working demo · lead to site visit

Send an enquiry. Your phone rings before you put it down.

Fill in the form as a homeowner would. An AI model checks the enquiry against the builder's rules, and if it fits, an AI voice agent calls you, answers questions and books a free site visit into the calendar. Every step shows up on the live dashboard as it happens.

~1.5 sto qualify the enquiry
<10 suntil the phone rings
~2 mincall to a booked visit
0manual hand-offs

Northline Homes is a made-up builder for this demo. The calling agent says up front that it is an AI. Use your own number; it is stored privately and only shown masked.

Tell us about your project

How it's built

One workflow, five steps, every step logged

This is a clean rebuild of a lead-to-booking workflow I run in production. The original is under NDA, so this version uses a fictional builder, but the architecture, guard rails and evaluation approach are the same.

  1. Web form · Facebook Lead Ads

    Capture

    The enquiry posts to an n8n webhook. Input is validated server-side and the phone number goes to a private table.

  2. LLM via forced function call

    Qualify

    The model applies written business rules and returns schema-shaped JSON, quoting the enquiry as evidence for every verdict.

  3. Vapi outbound call

    Call

    Qualified leads are called within seconds. The agent opens with context from the enquiry and discloses that it is an AI.

  4. n8n tool webhooks · Postgres

    Book

    Mid-call, the agent checks real availability and books a slot. A unique index stops two calls taking the same time.

  5. Supabase Realtime

    Report

    The call summary, outcome, transcript and recording land on the dashboard, with a timeline of every step.

Tested end to end

38 automated checks run the real n8n workflows against a real Postgres: validation, the private phone table, failed calls, double-booking races and every call outcome.

Evaluated, not eyeballed

A fixed set of test enquiries grades the qualifier on its decision, priority, flags and whether every quoted piece of evidence actually appears in the enquiry. Results post to the dashboard.

Safe to hand over

Secrets live in n8n credentials, the public site can only read, webhooks check a shared secret, and each workflow carries notes for the next person.