Define the agent.
Set instructions, add business knowledge, and choose supported model and voice providers.
PROMPTS / KNOWLEDGE / VOICEFROM BANDWIDTH LABSBuild AI voice agents
Build AI voice agents
with your choice
of providers.
Connect voice conversations to your business workflows.
Configure and test voice agents with your preferred telephony, model, and voice providers. Connect business tools to give every conversation a useful next step.
Free platform access. Third-party usage charges may apply.
YOUR TELEPHONY PROVIDER
BandwidthOther supported providers
Agent BuilderInstructions · Knowledge · Workflows
Your modelBring your LLM key
Your voiceChoose a provider
Your toolsConnect through MCP
Conceptual architecture illustration
Your vision. Your stack. Bandwidth expertise.
Explore supported providersFROM IDEA TO CONVERSATIONThe pieces you choose.
The pieces you choose.
The place they come together.
Configure the agent, connect the services it needs, and test how it responds. Start with one useful task.
Connect your stack.
Bring your calling setup and connect business tools through Model Context Protocol (MCP).
TELEPHONY / TOOLS / ACTIONSTest. Learn. Refine.
Try a conversation, review the transcript, and adjust the instructions and flow that need attention.
TEST CALLS / TRANSCRIPTSCHOICE IS PART OF THE DESIGNBring your providers.
Bring your providers.
Keep your options.
Connect Bandwidth or another supported telephony provider. Choose the communications setup that fits your needs.
Using Agent Builder does not require moving to Bandwidth.
Bring your LLM API key and choose supported model and voice options. Connection requirements depend on the providers you select.
WHY CONSIDER BANDWIDTH?A communications network.
A communications network.
And the people behind it.
Bandwidth owns and operates a communications network. Explore its network architecture, coverage, and voice capabilities for the calling experience you want to build.
Explore Bandwidth’s networkSTART WITH A REAL TASKGive the conversation
Give the conversation
somewhere to go.
Go beyond answering a question. Configure an agent to retrieve information or take the next step through a connected business tool.
Example workflows. Each requires agent configuration and the relevant business-tool connection.
Support triageILLUSTRATIVE WORKFLOW
CALLER
“I can’t access my account.”
YOUR AGENT
“What happens when you try to sign in? I can collect the details for the support team.”
CONNECTED SUPPORT TOOLCreate a support ticket
Issue details and caller context, ready for your team.
Order updatesILLUSTRATIVE WORKFLOW
CALLER
“Has my order shipped yet?”
YOUR AGENT
“Let’s check the latest update. What’s your order number?”
CONNECTED ORDER SYSTEMLook up the delivery status
Retrieve the latest order update for the agent to explain.
Lead qualificationILLUSTRATIVE WORKFLOW
CALLER
“Could this work for our support team?”
YOUR AGENT
“Tell me about the calls you handle and what you’d like to improve.”
CONNECTED SALES TOOLCapture the caller’s needs
Pass the conversation’s context to your sales team.
A CLEAR STARTING POINTFree orchestration.
Free orchestration.
Know your other costs.
Agent Builder provides free platform access. Your chosen providers may charge for the services your agent uses, including during tests.
What to have readyAGENT BUILDER PLATFORM ACCESS
Freefrom Bandwidth Labs
Your workspace for configuring, connecting, and testing voice agents.
Separate provider charges may apply
- TelephonyCalls & provider services
- Models & voicesAI & speech usage
- Business toolsConnected services
Review your providers’ pricing before running tests or handling calls.
BEFORE YOUR FIRST AGENTA little setup.
A little setup.
A clear next step.
Start with one task you want the agent to handle. Have your provider details ready so you can move from configuration to testing.
Create free account01
Your LLM API key
For the supported model you want your agent to use.
02
Your telephony provider
Bandwidth or another supported telephony provider, with the calling setup your configuration needs.
03
The services your task needs
Voice-provider credentials and business-tool access, depending on your configuration.
Do I have to use Bandwidth for calls?
No. You can use Bandwidth or another supported telephony provider. Connection requirements depend on the provider and setup you select.
What exactly is free?
Agent Builder provides free platform access. Telephony, models, voices, and other external services may incur charges from your providers, including during testing. Review those providers’ pricing before running calls.
Who is Agent Builder for?
Developers and technical product teams building voice agents. Expect to work with provider credentials, agent configuration, and integrations for connected business tools.
How do I connect my business tools?
Agent Builder supports tool connections through Model Context Protocol (MCP). Your workflow needs an appropriate tool connection and the permissions needed to retrieve information or perform the action.
What do I need before getting started?
Bring your LLM API key and telephony provider. You may also need voice-service credentials and access to the business tools your agent will use. Start with one focused task and review your provider’s setup requirements.
Is this ready for production use?
Agent Builder is an experimental release from Bandwidth Labs. Review the Labs terms for usage conditions, and contact the Labs team to discuss your use case and support requirements.
Where can my team review data handling?
The Labs terms include the Innovation Studio privacy policy. Review these alongside your selected providers’ policies. For questions about credentials or conversation data in your configuration, contact the Labs team.
EVALUATE WITH YOUR TEAM
A clear path to your first evaluation.
Follow the first-agent guide to configure your AI connections, test a browser conversation, and review the result. Connect a phone number when you are ready to evaluate phone calls.
YOUR NEXT AGENT STARTS HEREOne task.
One task.
Your first voice agent.
Choose your providers. Configure your agent.
Put the conversation to the test.