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POST
/
agents
/
calls
Create Outbound Call
curl --request POST \
  --url https://api.cartesia.ai/agents/calls \
  --header 'Authorization: Bearer <token>' \
  --header 'Cartesia-Version: <cartesia-version>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "from_number_id": "<string>",
  "agent_id": "<string>",
  "outbound_calls": [
    {
      "to_number": "<string>",
      "metadata": {}
    }
  ],
  "ringing_timeout_seconds": 42,
  "max_call_duration_minutes": 123
}
'
{
  "calls": [
    {
      "number": "<string>",
      "agent_call_id": "<string>",
      "error": {}
    }
  ]
}

Authorizations

​
Authorization
string
header
required

Cartesia API key (sk_car_...). Get one at play.cartesia.ai/keys.

Headers

​
Cartesia-Version
enum<string>
required

API version header.

Available options:
2026-03-01
Example:

"2026-03-01"

Body

application/json

Request body for starting outbound calls from an agent phone number.

​
from_number_id
string
required

Phone number ID to place calls from. The attached provider handles outbound calling for this number.

​
agent_id
string
required

Agent that handles the outbound calls.

​
outbound_calls
AgentOutboundCallItem · object[]
required

Per-call destination and metadata configuration.

Minimum array length: 1
​
ringing_timeout_seconds
integer

Seconds to wait for the callee to answer before giving up. Omit to use the default (60 seconds).

Required range: 5 <= x <= 80
​
max_call_duration_minutes
integer

Optional maximum call duration in minutes.

Response

Outbound call requests accepted.

​
calls
AgentOutboundCallItemResponse · object[]
required