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POST
/
v1
/
calls
cURL
curl --request POST \
  --url https://api.buildwithchirp.com/v1/calls \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "from": "+15551234567",
  "to": "+15559876543",
  "fromChannel": "pstn",
  "toChannel": "pstn",
  "metadata": {
    "campaignId": "camp_123"
  }
}
'
{
  "id": "call_2DbBs7GWhGvVNJGrDXr5RG0mBWI",
  "appId": "app_2DbBs7GWhGvVNJGrDXr5RG0mBWI",
  "direction": "outbound",
  "status": "in_progress",
  "fromAddress": "+15551234567",
  "toAddress": "+15559876543",
  "fromChannel": "pstn",
  "toChannel": "pstn",
  "duration": 120,
  "endReason": "hangup",
  "metadata": {},
  "livekitRoomName": "<string>",
  "startedAt": "2026-01-15T10:30:00Z",
  "answeredAt": "2026-01-15T10:30:05Z",
  "endedAt": "2026-01-15T10:32:05Z",
  "createdAt": "2026-01-15T10:30:00Z"
}

Documentation Index

Fetch the complete documentation index at: https://docs.buildwithchirp.com/llms.txt

Use this file to discover all available pages before exploring further.

Authorizations

​
Authorization
string
header
required

App API key (format: sk_live_app_* or sk_test_app_*) for app-level operations

Body

application/json
​
from
string
required

Caller address (phone number or identifier)

Example:

"+15551234567"

​
to
string
required

Callee address (phone number or identifier)

Example:

"+15559876543"

​
fromChannel
enum<string>
default:pstn

Channel for the caller leg

Available options:
pstn,
whatsapp,
webrtc
Example:

"pstn"

​
toChannel
enum<string>
default:pstn

Channel for the callee leg

Available options:
pstn,
whatsapp,
webrtc
Example:

"pstn"

​
metadata
object

Arbitrary metadata to attach to the call

Example:
{ "campaignId": "camp_123" }

Response

Call initiated successfully

​
id
string
required

Unique identifier for a Call. Format: call_[test_]{ksuid}

Pattern: ^call_(?:test_)?[a-zA-Z0-9]{27}$
Example:

"call_2DbBs7GWhGvVNJGrDXr5RG0mBWI"

​
appId
string
required

Unique identifier for a App. Format: app_[test_]{ksuid}

Pattern: ^app_(?:test_)?[a-zA-Z0-9]{27}$
Example:

"app_2DbBs7GWhGvVNJGrDXr5RG0mBWI"

​
direction
enum<string>
required
Available options:
inbound,
outbound
Example:

"outbound"

​
status
enum<string>
required

Current call status

Available options:
initiated,
ringing,
in_progress,
voicemail,
completed,
failed,
busy,
no_answer,
canceled
Example:

"in_progress"

​
fromAddress
string
required
Example:

"+15551234567"

​
toAddress
string
required
Example:

"+15559876543"

​
fromChannel
enum<string>
required

Communication channel for the call leg

Available options:
pstn,
whatsapp,
webrtc
Example:

"pstn"

​
toChannel
enum<string>
required

Communication channel for the call leg

Available options:
pstn,
whatsapp,
webrtc
Example:

"pstn"

​
duration
number | null
required

Call duration in seconds

Example:

120

​
endReason
string | null
required

Reason the call ended

Example:

"hangup"

​
metadata
object
required

Arbitrary metadata attached to the call

​
livekitRoomName
string | null
required

LiveKit room name for WebRTC connections

​
startedAt
string<date-time> | null
required
Example:

"2026-01-15T10:30:00Z"

​
answeredAt
string<date-time> | null
required
Example:

"2026-01-15T10:30:05Z"

​
endedAt
string<date-time> | null
required
Example:

"2026-01-15T10:32:05Z"

​
createdAt
string<date-time>
required
Example:

"2026-01-15T10:30:00Z"