call_analyzed for structured intake
Post-call analysis is where summaries and custom fields live. That is the usual trigger for CRM writes so you are not storing empty analysis objects from call_ended.
Retell webhook integrations
Retell AI integrations and webhooks.
A Retell webhook is how the voice agent stops being a phone conversation and starts being work in your systems. Wrk Less sets up the endpoint, verifies the signature, and routes each event into CRM, calendars, alerts, and the automations your operations team already trusts.
Webhook setup
The call is not finished until a system of record is updated.
Retell documents account-level and agent-level webhook URLs and events including call_started, call_ended, call_analyzed, transcript updates, and transfer states. Wrk Less picks the events that match your operating rules—not every event by default.
Signature check before any write
Deliveries include X-Retell-Signature. Wrk Less verifies authenticity, then maps a stable payload into n8n or your destination. Unsigned traffic never creates a lead.
One call, one record
Retries happen. Integrations key off call ID so a duplicate webhook does not create a second contact or a second appointment.
What we connect
CRM, appointments, notifications, custom automation.
CRM and workflow integration
Create or update the person, attach the transcript summary, tag the source as the voice agent, and open the next task for whoever owns follow-up. No retyping from a dashboard.
Appointment handling
If the agent collected a preferred window, the workflow checks real availability, books when your rules allow, or creates a “needs scheduling” task when the slot is gone. Humans still own exceptions.
Notifications
SMS, email, or a channel ping when a call is urgent, a transfer fails, or a high-intent seller is waiting. Quiet hours apply so your phone is not buzzing for every after-hours FAQ.
Custom automation
Onboarding packets, document requests, estimate drafts, or internal tickets can fire from the same payload. Deterministic steps do the filing; AI only fills fields you asked it to extract.
How this differs from agent setup
Scripts live on one page. The plumbing lives here.
Retell AI voice agent setup covers greetings, tools, phone routing, and boundaries. This page is the integration layer: webhook URL, event choice, field mapping, and what your team sees two minutes after the caller hangs up.
If you searched “Retell webhook,” you are usually trying to get data out of Retell and into the rest of the business. That is the job Wrk Less takes.
- Confirm the agent already collects the fields you need.
- Point Retell at a verified Wrk Less or customer endpoint.
- Map payload → CRM / calendar / inbox.
- Watch a week of live calls and tighten the mapping.
FAQ
What technical buyers ask about Retell webhooks.
What is a Retell webhook?
A Retell webhook is an HTTP POST Retell sends to a URL you control when something happens on a call—such as the call starting, ending, or finishing post-call analysis. Wrk Less uses that payload to update your CRM, book or log appointments, notify staff, and run custom automation.
Which Retell webhook event should we listen to for CRM updates?
Use call_analyzed when you need the summary, sentiment, success flag, or custom extracted fields. call_ended does not include call_analysis. Wrk Less wires the event that matches the job: live alerts on call_started or transfer events, structured records on call_analyzed.
Can a Retell webhook create CRM records and appointments?
Yes. The webhook is the handoff. From there Wrk Less maps fields into your CRM, calendar, or job board, creates or updates the contact, and only books time when your rules and availability allow it.
How do you keep Retell webhooks secure?
Retell signs deliveries with an X-Retell-Signature header. Wrk Less verifies that signature, uses the raw request body, and only then writes to downstream systems. Endpoints are not left open as anonymous public forms.
Do we have to use n8n?
No. n8n is a common destination because Wrk Less already operates workflow automation there, but the same Retell webhook can post to another automation tool or a custom endpoint if that is what your stack needs.
Sources
Primary documentation we follow.
Get the payload into the tools you already use