How to Supercharge Your AI Voice Agents With API, Make, and Zapier Integrations

Why a Voice Agent That Can’t Act Won’t Help Your Business

Many voicebots still do little more than answer a call or deliver static information. They are glorified answering machines — not business drivers.

With Rounded, it’s different: voice agents can act.

They can:

• Send a text (SMS)

• Update a CRM

• Book an appointment

• Change a lead status

• Trigger a payment process

• And many more!

👉 This is what AI that acts, not just talks really means.

How Rounded API and Integrations Unlock Real Automation Power

The true strength of Rounded voice agents lies in their ability to integrate seamlessly with your tools and systems — to truly act, not just speak.

🔗 What you can do with Rounded’s API:

➤ 1️⃣ Custom Tools to call your own APIs

During the conversation, your agent can perform API calls (POST, GET, PUT…) via Custom Tools — enabling it to interact live with your systems.

Example: check a subscription status, update a customer record, trigger a backend process.

➤ 2️⃣ Inject variables via API to personalize calls

You can inject variables into the Call Context:

• when triggering a call via API

• via CSV (for outbound campaigns)

These variables personalize the conversation and drive logic throughout the call.

➤ 3️⃣ React to real-time webhook events

Rounded emits webhook events during key moments of the call:

• call status updates

• variable changes

• tool usage

• post-call events

Your systems can react automatically to what happens during the conversation.

➤ 4️⃣ Control Rounded via public API

With Rounded API, you can:

• trigger calls

• retrieve call details

• update call data

• manage agents and campaigns programmatically

• and more…

How Rounded Works With Make, Zapier, and n8n

The real magic happens when Rounded is connected to automation platforms:

➤ Make

A powerful visual no-code platform to create complex, multi-step workflows — without code:

• trigger a Rounded call

• handle webhook events

• update CRMs, databases, or third-party apps

• send follow-ups

➤ Zapier

The easiest way to connect Rounded to 5,000+ popular apps:

• trigger calls from simple events (form submission, new contact…)

• log call results

• automate notifications

➤ n8n

An open-source automation tool, highly customizable:

• advanced logic

• complex data parsing

• full control over workflows

• self-hosted options

👉 Combined with Rounded’s API, these tools give you the power to make your AI voice agents truly actionable — fully connected to your business stack.

5 Powerful Voice Agent Integration Use Cases

Here are 5 high-impact use cases that Rounded customers already deploy:

🔹 1️⃣ SMS Follow-Up After a Call (Twilio, SMSAPI, MessageBird...)

• Send an appointment confirmation

• Deliver a payment link

• Share a personalized form

🔹 2️⃣ Automated CRM Updates (HubSpot, Notion, Airtable...)

• Move a contact to "follow-up needed" or "appointment confirmed"

• Add or update CRM fields based on call variables

🔹 3️⃣ Support Ticket Creation (Zendesk, Notion, Intercom...)

• Automatically open a ticket based on call outcomes

• Pre-fill the ticket with call data

🔹 4️⃣ Manage Appointment Scheduling (Google Calendar, Cal.com...)

• Book or update appointments from the voice agent

• Trigger calendar invites or confirmations after the call

You can watch our Youtube video on this topic!

🔹 5️⃣ Optimize Follow-Up Campaigns (Automated outbound call campaigns)

• Trigger outbound calls automatically — for example:

  • When a new lead enters the CRM

  • When a customer reaches a follow-up stage

  • When no response was received to emails

You can watch our Youtube video on this topic!

Conclusion: AI Voice Agents That Truly Drive Business Actions

With Rounded’s APIs and integrations with Make, Zapier, and n8n, your voice agents can do far more than talk.

They can:
✅ Act in real time
✅ Connect to your tools
✅ Trigger automated workflows
✅ Drive business outcomes — not just conversations

👉 Ready to build voice agents that act, not just talk? Rounded makes it easy — with no code and endless possibilities.