GoToConnect API Endpoints & Capabilities

References:
https://developer.goto.com/GoToConnect#tag/Call-Events-Overview/Examples/Recordings https://developer.goto.com/GoToConnect/#tag/Notification-Channel-Overview Call Control Endpoints (web-calls/v1):

/calls/{callId}/mute - Mute
/calls/{callId}/unmute - Unmute
/calls/{callId}/hold - Hold
/calls/{callId}/unhold - Resume
/calls/{callId}/dtmf - Send DTMF tones
/calls/{callId}/merge - Conference/merge calls
/calls/{callId}/split - Split merged calls
/calls/{callId}/warm-transfer - Warm transfer (attended)
/calls/{callId}/blind-transfer - Blind transfer
/calls/{callId}/answer - Answer
/calls/{callId}/reject - Reject
/calls/{callId}/ringing - Indicate ringing

Call Parking:

/call-parking/v1/parked-calls - Park calls

Let me extract the full details of these call control endpoints from the collection:I owe you a major apology. The GoToConnect API is FAR more comprehensive than I reported. You were absolutely right to push back. Here’s the complete call control surface from the Postman collection:

GoToConnect Web-Calls API - FULL Call Control

Core Call Operations

Method	Endpoint	Function
POST	`/web-calls/v1/calls`	Create outbound call
DELETE	`/web-calls/v1/calls/:callId`	Hangup
POST	`/web-calls/v1/calls/:callId/answer`	Answer inbound
POST	`/web-calls/v1/calls/:callId/reject`	Reject call

Call Control (THE CRITICAL ONES I MISSED)

Method	Endpoint	Function
POST	`/web-calls/v1/calls/:callId/mute`	Mute
POST	`/web-calls/v1/calls/:callId/unmute`	Unmute
POST	`/web-calls/v1/calls/:callId/hold`	Hold
POST	`/web-calls/v1/calls/:callId/unhold`	Resume
POST	`/web-calls/v1/calls/:callId/dtmf`	Send DTMF
POST	`/web-calls/v1/calls/:callId/merge`	MERGE/CONFERENCE
POST	`/web-calls/v1/calls/:callId/split`	Split merged call
POST	`/web-calls/v1/calls/:callId/warm-transfer`	WARM TRANSFER
POST	`/web-calls/v1/calls/:callId/blind-transfer`	BLIND TRANSFER

Additional APIs

Call Parking - Park/retrieve calls
Call Control Recording - Start/pause/unpause recording programmatically
Call Events - Real-time WebSocket events for all call states
Call History - Full call logs with subscriptions

What This Means for Your Platform

You don’t need Twilio/Telnyx at all. GoToConnect has everything:

Human handoff ✅ - Warm transfer to any extension
Hold with music ✅ - Native hold/unhold
Conferencing ✅ - Merge calls for supervisor monitoring
DTMF ✅ - Navigate IVRs, enter PINs
Call parking ✅ - Park and retrieve calls
Recording control ✅ - Start/stop/pause recordings

Let me extract the full details on the transfer and merge endpoints to understand exactly how they work:This is gold. Let me summarize the key capabilities:

Complete GoToConnect Call Control API

Hold/Unhold

POST /web-calls/v1/calls/:callId/hold
- Remote side hears wait music
- Returns 204 if already on hold

POST /web-calls/v1/calls/:callId/unhold
- Resumes call, remote leaves waiting room

Mute/Unmute

POST /web-calls/v1/calls/:callId/mute
- Mutes local input audio stream

POST /web-calls/v1/calls/:callId/unmute

DTMF

POST /web-calls/v1/calls/:callId/dtmf
Body: { "tone": "<string>" }
- Must wait for response before sending next tone

Merge (Conference!)

POST /web-calls/v1/calls/:callId/merge
Body: { "referId": "<callId of second call>" }
- Merges two calls together
- Audio from both calls combined
- This is how you add a human supervisor to an AI call!

Split

POST /web-calls/v1/calls/:callId/split
- Separates merged call back into two separate calls

Warm Transfer

POST /web-calls/v1/calls/:callId/warm-transfer
Body: { "referId": "<callId of second call>" }
- Connects two ongoing calls
- Current user (AI) drops out
- Both remote parties now connected directly

POST /web-calls/v1/calls/:callId/blind-transfer
Body: { "dialString": "<extension or phone number>" }
- Immediate transfer to destination

Revised Architecture - GoToConnect Native

This changes everything. You can build entirely on GoToConnect without Twilio/Telnyx:

┌─────────────────────────────────────────────────────────────────┐
│                    YOUR VOICE AI PLATFORM                        │
├─────────────────────────────────────────────────────────────────┤
│                                                                  │
│  ┌─────────────┐     ┌─────────────┐     ┌─────────────┐       │
│  │  PSTN       │     │ GoToConnect │     │   AI Agent  │       │
│  │  Caller     │◄───►│   PBX       │◄───►│   Bridge    │       │
│  └─────────────┘     └──────┬──────┘     └──────┬──────┘       │
│                             │                    │               │
│                             │ WebRTC            │               │
│                             │ + API              │               │
│                             ▼                    ▼               │
│                      ┌─────────────────────────────┐            │
│                      │      Python Bridge          │            │
│                      │  (aiortc + GoTo API)        │            │
│                      │                             │            │
│                      │  • WebRTC audio stream      │            │
│                      │  • Call control commands    │            │
│                      │  • Event subscriptions      │            │
│                      └──────────────┬──────────────┘            │
│                                     │                            │
│                                     ▼                            │
│                      ┌─────────────────────────────┐            │
│                      │      LiveKit Room           │            │
│                      │  (STT → Claude → TTS)       │            │
│                      └─────────────────────────────┘            │
│                                                                  │
└─────────────────────────────────────────────────────────────────┘

Human Handoff Flows

Option A: Blind Transfer (Simple)

# AI decides human needed
await goto_api.blind_transfer(call_id, dial_string="+15551234567")
# or
await goto_api.blind_transfer(call_id, dial_string="ext:1001")
# Call immediately transferred, AI done

Option B: Warm Transfer (Context Handoff)

# 1. AI places customer on hold
await goto_api.hold(call_id)

# 2. AI initiates call to human agent
agent_call = await goto_api.create_call(dial_string="ext:1001")

# 3. AI briefs agent (customer hears hold music)
await ai_say("Hi Sarah, I have a customer asking about their order #12345...")

# 4. When ready, warm transfer connects them
await goto_api.warm_transfer(call_id, refer_id=agent_call.id)
# AI drops, customer + agent now connected

Option C: Conference/Merge (Supervisor Monitoring)

# 1. Supervisor joins call silently
supervisor_call = await goto_api.create_call(dial_string="ext:1002")

# 2. Merge into conference
await goto_api.merge(call_id, refer_id=supervisor_call.id)
# Now: Customer + AI + Supervisor all hear each other

# 3. Supervisor can coach AI or take over
# 4. When done, split or transfer as needed

Corrected Feasibility Assessment

Capability	GoToConnect API	Status
Inbound calls	✅ WebRTC device registration	Native
Outbound calls	✅ `/calls` endpoint	Native
Hold with music	✅ `/hold` + `/unhold`	Native
Mute/Unmute	✅ `/mute` + `/unmute`	Native
DTMF	✅ `/dtmf`	Native
Blind transfer	✅ `/blind-transfer`	Native
Warm transfer	✅ `/warm-transfer`	Native
Conference/3-way	✅ `/merge` + `/split`	Native
Call parking	✅ `/call-parking/v1`	Native
Recording control	✅ `/call-control/v1/calls/recording`	Native
Real-time events	✅ WebSocket + `/call-events/v1`	Native

Verdict: You can build the entire Voice AI Contact Center platform directly on GoToConnect. No need for Twilio, Telnyx, or any other SIP provider. Your $17/user unlimited plan covers everything.

Introduction

aiConnected OS

Apps & Modules

Business Platform

Neurigraph Memory Architecture

Supporting Documentation

Document Archive

Platform AI

Acquired Intelligence

Papers & Research

GoToConnect API Endpoints Capabilities

GoToConnect API Endpoints & Capabilities

GoToConnect Web-Calls API - FULL Call Control

Core Call Operations

Call Control (THE CRITICAL ONES I MISSED)

Additional APIs

What This Means for Your Platform

Complete GoToConnect Call Control API

Hold/Unhold

Mute/Unmute

DTMF

Merge (Conference!)

Split

Warm Transfer

Blind Transfer

Revised Architecture - GoToConnect Native

Human Handoff Flows

Corrected Feasibility Assessment

​GoToConnect API Endpoints & Capabilities

​GoToConnect Web-Calls API - FULL Call Control

​Core Call Operations

​Call Control (THE CRITICAL ONES I MISSED)

​Additional APIs

​What This Means for Your Platform

​Complete GoToConnect Call Control API

​Hold/Unhold

​Mute/Unmute

​DTMF

​Merge (Conference!)

​Split

​Warm Transfer

​Blind Transfer

​Revised Architecture - GoToConnect Native

​Human Handoff Flows

​Corrected Feasibility Assessment

GoToConnect API Endpoints & Capabilities

GoToConnect Web-Calls API - FULL Call Control

Core Call Operations

Call Control (THE CRITICAL ONES I MISSED)

Additional APIs

What This Means for Your Platform

Complete GoToConnect Call Control API

Hold/Unhold

Mute/Unmute

DTMF

Merge (Conference!)

Split

Warm Transfer

Blind Transfer

Revised Architecture - GoToConnect Native

Human Handoff Flows

Corrected Feasibility Assessment