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SignalWire Developer Toolkit | SignalWire

Build What You Need

Build conversational agents that can speak naturally, trigger backend actions, and adapt mid-call. With modular prompts, skills, and integrated voice control, you define exactly how your agents behave. Use it end-to-end or integrate just the pieces you need into your existing workflow.

Core Voice Platform

Core capabilities for provisioning, connecting, and scaling real-time voice apps.

Provision Phone Numbers with the REST API
Provision Phone Numbers with the REST API

Use it for:
Purchasing and assigning numbers to projects

How it works:
Uses the provision method via the REST API to search, buy, and configure numbers

Embed a Browser Dialer with the Call Widget
Embed a Browser Dialer with the Call Widget

Use it for:
Adding voice to dashboards, CRMs, or web portals

How it works:
The Call Widget uses call flow routing and the connect method to initiate live calls

Build SIP/WebRTC Clients with the Browser SDK
Build SIP/WebRTC Clients with the Browser SDK

Use it for:
Branded in-app calling or embedded voice clients

How it works:
Use the Browser SDK to register users (via the register method), manage sessions, and handle events

Register and Route Calls with Subscribers
Register and Route Calls with Subscribers

Use it for:
Creating internal users or agents with SIP/WebRTC

How it works:
Subscribers are addressable resources that authenticate clients and define call permissions

Generate Call Reports with the REST API
Generate Call Reports with the REST API

Use it for:
Auditing, analytics, or BI dashboards

How it works:
Uses the list calls method to retrieve structured records for analysis

Summarize Voice Usage
Summarize Voice Usage

Use it for:
Quota tracking, account reviews, internal reporting

How it works:
Use the list calls method with filters to group usage by number, user, or service

Analyze Call Costs
Analyze Call Costs

Use it for:
Budgeting, chargebacks, or customer insights

How it works:
Retrieve CDRs via the list calls method, then apply custom pricing logic

Export Voice Reports as PDF
Export Voice Reports as PDF

Use it for:
Sharing usage insights with stakeholders

How it works:
Use the REST API to gather data, then pass results to a PDF generator (e.g., Python, JS)

Sync Configuration Across Environments
Sync Configuration Across Environments

Use it for:
Managing parity across dev/staging/prod

How it works:
Script provisioning of numbers, subscribers, and call flows using the provision method

Set Up SIP Interconnect
Set Up SIP Interconnect

Use it for:
Connecting on-prem systems or SBCs to SignalWire

How it works:
Configure SIP trunks, then use the connect method to route calls

Configure PSTN Interconnect
Configure PSTN Interconnect

Use it for:
Sending and receiving calls over the public telephone network

How it works:
Use the connect method to route between PSTN numbers and SignalWire logic

Enable WhatsApp Interconnect
Enable WhatsApp Interconnect

Use it for:
Messaging over WhatsApp with business-verified numbers

How it works:
Connect approved WhatsApp accounts and manage sessions via the Messaging API

Real-Time Call Control

Route, manage, and enhance live calls dynamically.

Build a Full-Featured Call Center
Build a Full-Featured Call Center

Use it for:
Dashboards, summaries, or compliance monitoring

How it works:
Add the transcribe method to the call leg before routing to enable live transcription

Live Transcribe in Real Time with Live Transcription
Live Transcribe in Real Time with Live Transcription

Use it for:
Dashboards, summaries, compliance.

How:
Add to call leg before routing.

Translate Speech Live with Live Translation
Translate Speech Live with Live Translation

Use it for:
Multilingual support or tone shifting in live conversations

How it works:
Replace or augment live audio using the translate method during the call

Offer Callback from a Queue
Offer Callback from a Queue

Use it for:
Managing long hold times with scheduled callbacks

How it works:
Use logic in your call flow to offer and trigger callbacks during queueing

Inject AI Audio into Conferences with Agent SDK
Inject AI Audio into Conferences with Agent SDK

Use it for:
Real-time analysis, virtual agent participation, or AI-generated audio

How it works:
Attach an AI Agent using the stream method to listen, respond, and act in the conversation

Record Calls with Dynamic Recording
Record Calls with Dynamic Recording

Use it for:
QA, compliance, redaction, or playback

How it works:
Start and stop recordings mid-call using the record method and conditional logic

Detect Voicemail and AMD
Detect Voicemail and AMD

Use it for:
Smarter routing based on human vs. machine detection

How it works:
Use the amd method to classify pickup type before continuing the call flow

Handle PII & Compliance Securely
Handle PII & Compliance Securely

Use it for:
HIPAA, PCI, and custom data privacy enforcement

How it works:
Combine region-aware routing with selective recording and redaction logic

Dial Numbers with Voice Input
Dial Numbers with Voice Input

Use it for:
Voice-driven navigation or hands-free experiences

How it works:
Use the gather method with speech recognition to collect input and trigger actions

Capture Audio with WebSockets
Capture Audio with WebSockets

Use it for:
Real-time ML pipelines, custom analytics, or raw audio capture

How it works:
Use the tap method to stream audio to a WebSocket endpoint

Control Logic with Time-Based Rules
Control Logic with Time-Based Rules

Use it for:
Mid-call updates like starting/stopping recordings or dynamic transfers

How it works:
Use the rpc method via Agent SDK or the REST API to push updates to a live session

Analyze Caller Sentiment in Real Time
Analyze Caller Sentiment in Real Time

Use it for:
Real-time agent routing, escalation triggers.

How:
Analyze speech via sentiment model and adapt call logic.

AI Agent Tools

Build intelligent agents that act, adapt, and remember.

Build Voice Agents with the Agent SDK
Build Voice Agents with the Agent SDK

Use it for:
Prompt orchestration, tool calls (skills), barge-in handling, and agent memory

How it works:
Use lifecycle hooks, modular skills, and integrated voice stack to design live AI behavior

Structure Prompts for Consistent Behavior
Structure Prompts for Consistent Behavior

Use it for:
Ensuring tone control, fallback handling, and reusable logic

How it works:
Define reusable named prompts inside the Agent SDK or via builder tools

Run Multiple Agents in One Session
Run Multiple Agents in One Session

Use it for:
Splitting functionality (e.g., routing, billing, support) between roles

How it works:
Use the Agent SDK runtime to register and switch between agents on the fly

Store & Retrieve Context with Datasphere
Store & Retrieve Context with Datasphere

Use it for:
Agent memory, personalization, and retrieval-augmented grounding

How it works:
Use Datasphere via Agent SDK to store context and query it in tools or prompts

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