Skip to content
Ab Singh
AI Automations, Agents & Systems
All work
Book a call
(opens in a new tab)
n8n workflows I’ve built
All running in production on my self-hosted n8n. Open any one to see what it does.
Voice tool call
Look up order
Route by tool
Cancel order
Partial refund ≤30%
Re-ship order
+7 more actions
Reply to agent
Log action
~250 ms per action
E-commerce support desk, by phone
A voice agent verifies the order, then cancels, refunds, re-ships or escalates — live, mid-call.
n8n
Retell
Data Tables
18 steps
Tool call
Get patients
Get appointments
Run tool
Reply to agent
Route write
Insert appointment
Update appointment
Insert lead
English + Spanish
Clinic consult booking
Checks four providers’ calendars, books or moves consults, and scores new leads hot, warm or nurture.
n8n
Vapi
Retell
Data Tables
19 steps
Tool call
Get bookings
Run tools
Reply to agent
Route write
Insert booking
Insert lead outcome
Log action
10/10 test calls pass
Gym speed-to-lead
A new lead fills the form, an AI coach calls back, books the free assessment and texts the details.
n8n
Vapi
Retell
Data Tables
15 steps
Tool calls
Read site templates
Read call state
Resolve calls
Commit call state
Commit action trace
Reply after commit
39/39 live tool tests pass
Fire & security service desk
Logs faults, sets priority by impact, dispatches the on-call engineer, books visits and surveys.
n8n
Vapi
Data Tables
13 steps
Call ended
Read call report
Get actions taken
Compose ticket
Save to call log
Ready the second the call ends
After-call ticket, written for you
Every call ends as a finished support ticket: summary, intent, sentiment and the actions taken.
n8n
Retell
Data Tables
10 steps
✕
Voice tool call
Look up order
Route by tool
Cancel order
Partial refund ≤30%
Re-ship order
+7 more actions
Reply to agent
Log action
E-commerce support desk, by phone
Starts when
The voice agent calls a tool during a live phone call.
Does
Verifies the caller’s order, then routes to one of 10 actions. Refunds above 30% wait for a human.
Result
An answer back to the caller in about 250 ms, and every action logged.
n8n
Retell
Data Tables
18 steps
Call it yourself →
✕
Tool call
Get patients
Get appointments
Run tool
Reply to agent
Route write
Insert appointment
Update appointment
Insert lead
Clinic consult booking
Starts when
A voice agent (Vapi or Retell) asks for a slot, a booking or a patient lookup.
Does
Matches the procedure to the right surgeon, offers real open slots, verifies patients by phone and date of birth.
Result
The booking lands in the calendar and is texted to the patient. A nightly reset keeps the demo clean.
n8n
Vapi
Retell
Data Tables
19 steps
✕
Tool call
Get bookings
Run tools
Reply to agent
Route write
Insert booking
Insert lead outcome
Log action
Gym speed-to-lead
Starts when
A lead submits the website form; the voice agent calls them and asks for open slots.
Does
Offers real slots (in person or Zoom), books one, schedules callbacks, sends the guide or plans by text.
Result
A booking, a logged outcome with objections, and a confirmation text — before the lead goes cold.
n8n
Vapi
Retell
Data Tables
15 steps
✕
Tool calls
Read site templates
Read call state
Resolve calls
Commit call state
Commit action trace
Reply after commit
Fire & security service desk
Starts when
A caller reports a fault or asks for a visit; the agent calls one of 8 tools.
Does
Checks contract cover, triages P1–P3, picks a qualified engineer in the area, and commits every change before confirming it.
Result
A dispatch, booking or callback the caller hears confirmed — and never one that didn’t really happen.
n8n
Vapi
Data Tables
13 steps
✕
Call ended
Read call report
Get actions taken
Compose ticket
Save to call log
After-call ticket, written for you
Starts when
The call ends and the voice platform posts its report.
Does
Reads the summary, attaches every action the agent took, labels it resolved or needs-approval.
Result
A ticket in the call log — and shown live on the website while the call is still running.
n8n
Retell
Data Tables
10 steps
See a ticket build live →
