Voice for developers
Place and receive programmable calls, guide callers through IVR menus, and connect your PBX over SIP trunks.
Trusted by engineering and product teams
shipping at global scale.
Connect your existing PBX
and control where calls go.
Link your PBX, contact center, or softphone to the telephone network without replacing your hardware.
Authenticate SIP traffic, call from verified numbers, and choose which countries your trunk can dial.
Your calls. In your workflow.
Trigger outbound calls, route incoming callers, and inspect live or completed call legs from one integration. Query call status, durations, and disconnect reasons from your code, terminal, or AI assistant.
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Readyvoice_legs_list
2 callsvoice_legs_get
In progressvoice_legs_get
RingingGuide callers
to the right answer.
Build IVR menus, spoken greetings, and keypad routing in Bird’s visual sequence editor without deploying new code for prompt changes. Preview and test each branch before you publish it to your live phone numbers.
Gather digits
How can we help?
Keypad input
Say text
Collection details
Your collection is ready. Bring your order number when you visit.
Know why a call
connected or failed.
See whether a call was answered, declined, or timed out ringing, with exact timestamps and network response codes.
Track ringing time separately from billable talk time so you can audit costs and troubleshoot failed calls fast.
- Total duration
- 0s
- Billable time
- 0s
- Total duration
- 42s
- Billable time
- 36s
Spot answer rate drops
by destination and hour.
Track call volume and answer rates over time, isolate unanswered spikes to a specific country or time window, and drill into the affected call logs before customers report an issue.
Answer rate
85,2%
Explore Voice.
Programmable outbound calling, IVR menus, SIP trunking, and call recording in one workspace.
Trigger outbound notifications, reminders, and automated phone calls directly from your application.
Call sequencesDesign spoken greetings, keypad menus, and routing branches in the visual editor without deploying code.
SIP trunkingConnect your existing PBX, contact center, or softphone over TLS with credential auth and country controls.
Incoming callsRoute calls on each Bird number to a SIP trunk, a published call sequence, or a verified forwarding number.
Browser phoneAnswer ring-group calls and place outbound calls straight from the Bird dashboard without configuring a separate softphone.
RecordingsCapture call audio and transcripts with configurable retention and access controls for quality reviews.
Caller IDsVerify your business numbers so outbound calls display a trusted caller ID that customers recognize.
Global callingEnable the countries your workspace dials and keep high-risk destinations blocked to reduce toll fraud exposure.
Call logsInspect ringing time, billable talk duration, and disconnect reasons to troubleshoot failed or dropped calls.
WebhooksReceive real-time events when calls ring, connect, or end so your app can update records and trigger follow-ups.
Scale without losing control.
Separate production and sandbox traffic into dedicated workspaces, scope API keys to the exact channels each service or agent needs, and track permission changes in the audit log.