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POST
/
api
/
v1
/
Account
/
{auth_id}
/
Call
/
{call_uuid}
/
DTMF
/
Send DTMF tones
curl --request POST \
  --url https://api.vobiz.ai/api/v1/Account/{auth_id}/Call/{call_uuid}/DTMF/ \
  --header 'Content-Type: application/json' \
  --header 'X-Auth-ID: <api-key>' \
  --header 'X-Auth-Token: <api-key>' \
  --data '
{
  "digits": "1234"
}
'
DTMF (Dual-Tone Multi-Frequency) is the tone generated whenever a key is pressed during an active call. Use this resource to send DTMF digits programmatically - the most common use case is automating digit entry to a receiver in an outbound call.
Use case: Automatically navigate IVR menus, enter access codes, or provide automated responses to phone systems without manual input.

​
API endpoint

POST https://api.vobiz.ai/api/v1/Account/{auth_id}/Call/{call_uuid}/DTMF/

​
Key features

All DTMF digits

Send any DTMF digit including 0–9, *, and # for complete IVR navigation.

Leg selection

Choose which call leg (caller or callee) receives the DTMF tones.

Real-time sending

Send digits instantly during active calls for immediate interaction.

Automation ready

Perfect for automated call flows, IVR navigation, and programmatic call control.

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Common use cases

  • IVR menu navigation - Automatically navigate through IVR menus by sending the appropriate menu selections.
  • Access code entry - Enter conference codes, PIN numbers, or access codes without manual input.
  • Automated survey responses - Submit automated responses to phone surveys or feedback systems.
  • Account verification - Automatically enter account numbers or verification codes during calls.
  • Call control - Send control codes to phone systems that accept DTMF commands.

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Available operations

Send digits on a call

POST - Send DTMF digits to an active call. Specify the digits to send and which call leg should receive them.

Authorizations

​
X-Auth-ID
string
header
required

Your Vobiz account Auth ID

​
X-Auth-Token
string
header
required

Your Vobiz account Auth Token

Path Parameters

​
auth_id
string
required

Your account Auth ID

Example:

"MA_XXXXXX"

​
call_uuid
string
required

Body

application/json
​
digits
string
required
Example:

"1w2W3"

​
leg
enum<string>
default:aleg
Available options:
aleg,
bleg,
both

Response

200

DTMF sent