Ai telnyx-voice-advanced-curl

install

source · Clone the upstream repo

git clone https://github.com/team-telnyx/ai

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/team-telnyx/ai "$T" && mkdir -p ~/.claude/skills && cp -r "$T/providers/cursor/plugin/skills/telnyx-voice-advanced-curl" ~/.claude/skills/team-telnyx-ai-telnyx-voice-advanced-curl-87ac65 && rm -rf "$T"

manifest: providers/cursor/plugin/skills/telnyx-voice-advanced-curl/SKILL.md

source content

Telnyx Voice Advanced - curl

Installation

# curl is pre-installed on macOS, Linux, and Windows 10+

Setup

export TELNYX_API_KEY="YOUR_API_KEY_HERE"

All examples below use

$TELNYX_API_KEY

for authentication.

Error Handling

All API calls can fail with network errors, rate limits (429), validation errors (422), or authentication errors (401). Always handle errors in production code:

# Check HTTP status code in response
response=$(curl -s -w "\n%{http_code}" \
  -X POST "https://api.telnyx.com/v2/messages" \
  -H "Authorization: Bearer $TELNYX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"to": "+13125550001", "from": "+13125550002", "text": "Hello"}')

http_code=$(echo "$response" | tail -1)
body=$(echo "$response" | sed '$d')

case $http_code in
  2*) echo "Success: $body" ;;
  422) echo "Validation error — check required fields and formats" ;;
  429) echo "Rate limited — retry after delay"; sleep 1 ;;
  401) echo "Authentication failed — check TELNYX_API_KEY" ;;
  *)   echo "Error $http_code: $body" ;;
esac

Common error codes:

invalid API key,

insufficient permissions,

resource not found,

validation error (check field formats),

rate limited (retry with exponential backoff).

Join AI Assistant Conversation

Add a participant to an existing AI assistant conversation. Use this command to bring an additional call leg into a running AI conversation.

POST /calls/{call_control_id}/actions/ai_assistant_join

— Required:

conversation_id

participant

Optional:

client_state

(string),

command_id

(string)

curl \
  -X POST \
  -H "Authorization: Bearer $TELNYX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "conversation_id": "v3:abc123",
  "participant": {}
}' \
  "https://api.telnyx.com/v2/calls/v3:550e8400-e29b-41d4-a716-446655440000_gRU1OGRkYQ/actions/ai_assistant_join"

Returns:

conversation_id

(uuid),

result

(string)

Update client state

Updates client state

PUT /calls/{call_control_id}/actions/client_state_update

— Required:

client_state

curl \
  -X PUT \
  -H "Authorization: Bearer $TELNYX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "client_state": "aGF2ZSBhIG5pY2UgZGF5ID1d"
}' \
  "https://api.telnyx.com/v2/calls/v3:550e8400-e29b-41d4-a716-446655440000_gRU1OGRkYQ/actions/client_state_update"

Returns:

result

(string)

Send DTMF

Sends DTMF tones from this leg. DTMF tones will be heard by the other end of the call. Expected Webhooks:

There are no webhooks associated with this command.

POST /calls/{call_control_id}/actions/send_dtmf

— Required:

digits

Optional:

client_state

(string),

command_id

(string),

duration_millis

(int32)

curl \
  -X POST \
  -H "Authorization: Bearer $TELNYX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "digits": "1www2WABCDw9"
}' \
  "https://api.telnyx.com/v2/calls/v3:550e8400-e29b-41d4-a716-446655440000_gRU1OGRkYQ/actions/send_dtmf"

Returns:

result

(string)

SIPREC start

Start siprec session to configured in SIPREC connector SRS.

Expected Webhooks:

```
siprec.started
```
```
siprec.stopped
```
```
siprec.failed
```

POST /calls/{call_control_id}/actions/siprec_start

Optional:

client_state

(string),

connector_name

(string),

include_metadata_custom_headers

(boolean),

secure

(boolean),

session_timeout_secs

(integer),

sip_transport

(enum: udp, tcp, tls),

siprec_track

(enum: inbound_track, outbound_track, both_tracks)

curl \
  -X POST \
  -H "Authorization: Bearer $TELNYX_API_KEY" \
  -H "Content-Type: application/json" \
  "https://api.telnyx.com/v2/calls/v3:550e8400-e29b-41d4-a716-446655440000_gRU1OGRkYQ/actions/siprec_start"

Returns:

result

(string)

SIPREC stop

Stop SIPREC session. Expected Webhooks:

```
siprec.stopped
```

POST /calls/{call_control_id}/actions/siprec_stop

Optional:

client_state

(string),

command_id

(string)

curl \
  -X POST \
  -H "Authorization: Bearer $TELNYX_API_KEY" \
  -H "Content-Type: application/json" \
  "https://api.telnyx.com/v2/calls/v3:550e8400-e29b-41d4-a716-446655440000_gRU1OGRkYQ/actions/siprec_stop"

Returns:

result

(string)

Noise Suppression Start (BETA)

POST /calls/{call_control_id}/actions/suppression_start

Optional:

client_state

(string),

command_id

(string),

direction

(enum: inbound, outbound, both),

noise_suppression_engine

(enum: Denoiser, DeepFilterNet, Krisp, AiCoustics),

noise_suppression_engine_config

(object)

curl \
  -X POST \
  -H "Authorization: Bearer $TELNYX_API_KEY" \
  -H "Content-Type: application/json" \
  "https://api.telnyx.com/v2/calls/v3:550e8400-e29b-41d4-a716-446655440000_gRU1OGRkYQ/actions/suppression_start"

Returns:

result

(string)

Noise Suppression Stop (BETA)

POST /calls/{call_control_id}/actions/suppression_stop

Optional:

client_state

(string),

command_id

(string)

curl \
  -X POST \
  -H "Authorization: Bearer $TELNYX_API_KEY" \
  -H "Content-Type: application/json" \
  "https://api.telnyx.com/v2/calls/v3:550e8400-e29b-41d4-a716-446655440000_gRU1OGRkYQ/actions/suppression_stop"

Returns:

result

(string)

Switch supervisor role

Switch the supervisor role for a bridged call. This allows switching between different supervisor modes during an active call

POST /calls/{call_control_id}/actions/switch_supervisor_role

— Required:

role

curl \
  -X POST \
  -H "Authorization: Bearer $TELNYX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "role": "barge"
}' \
  "https://api.telnyx.com/v2/calls/v3:550e8400-e29b-41d4-a716-446655440000_gRU1OGRkYQ/actions/switch_supervisor_role"

Returns:

result

(string)

Webhooks

Webhook Verification

Telnyx signs webhooks with Ed25519. Each request includes

telnyx-signature-ed25519

and

telnyx-timestamp

headers. Always verify signatures in production:

# Telnyx signs webhooks with Ed25519 (asymmetric — NOT HMAC/Standard Webhooks).
# Headers sent with each webhook:
#   telnyx-signature-ed25519: base64-encoded Ed25519 signature
#   telnyx-timestamp: Unix timestamp (reject if >5 minutes old for replay protection)
#
# Get your public key from: Telnyx Portal > Account Settings > Keys & Credentials
# Use the Telnyx SDK in your language for verification (client.webhooks.unwrap).
# Your endpoint MUST return 2xx within 2 seconds or Telnyx will retry (up to 3 attempts).
# Configure a failover URL in Telnyx Portal for additional reliability.

The following webhook events are sent to your configured webhook URL. All webhooks include

telnyx-timestamp

and

telnyx-signature-ed25519

headers for Ed25519 signature verification. Use

client.webhooks.unwrap()

to verify.

Event	Description
`callConversationEnded`	Call Conversation Ended
`callConversationInsightsGenerated`	Call Conversation Insights Generated
`callDtmfReceived`	Call Dtmf Received
`callMachineDetectionEnded`	Call Machine Detection Ended
`callMachineGreetingEnded`	Call Machine Greeting Ended
`callMachinePremiumDetectionEnded`	Call Machine Premium Detection Ended
`callMachinePremiumGreetingEnded`	Call Machine Premium Greeting Ended
`callReferCompleted`	Call Refer Completed
`callReferFailed`	Call Refer Failed
`callReferStarted`	Call Refer Started
`callSiprecFailed`	Call Siprec Failed
`callSiprecStarted`	Call Siprec Started
`callSiprecStopped`	Call Siprec Stopped

Webhook payload fields

callConversationEnded

Field	Type	Description
`data.record_type`	enum: event	Identifies the type of the resource.
`data.event_type`	enum: call.conversation.ended	The type of event being delivered.
`data.id`	uuid	Unique identifier for the event.
`data.occurred_at`	date-time	ISO 8601 datetime of when the event occurred.
`data.created_at`	date-time	Timestamp when the event was created in the system.
`data.payload.assistant_id`	string	Unique identifier of the assistant involved in the call.
`data.payload.call_control_id`	string	Call ID used to issue commands via Call Control API.
`data.payload.connection_id`	string	Call Control App ID (formerly Telnyx connection ID) used in the call.
`data.payload.call_leg_id`	string	ID that is unique to the call leg.
`data.payload.call_session_id`	string	ID that is unique to the call session (group of related call legs).
`data.payload.client_state`	string	Base64-encoded state received from a command.
`data.payload.calling_party_type`	enum: pstn, sip	The type of calling party connection.
`data.payload.conversation_id`	string	ID unique to the conversation or insight group generated for the call.
`data.payload.duration_sec`	integer	Duration of the conversation in seconds.
`data.payload.from`	string	The caller's number or identifier.
`data.payload.to`	string	The callee's number or SIP address.
`data.payload.llm_model`	string	The large language model used during the conversation.
`data.payload.stt_model`	string	The speech-to-text model used in the conversation.
`data.payload.tts_provider`	string	The text-to-speech provider used in the call.
`data.payload.tts_model_id`	string	The model ID used for text-to-speech synthesis.
`data.payload.tts_voice_id`	string	Voice ID used for TTS.

callConversationInsightsGenerated

Field	Type	Description
`data.record_type`	enum: event	Identifies the type of the resource.
`data.event_type`	enum: call.conversation_insights.generated	The type of event being delivered.
`data.id`	uuid	Identifies the type of resource.
`data.occurred_at`	date-time	ISO 8601 datetime of when the event occurred.
`data.payload.call_control_id`	string	Call ID used to issue commands via Call Control API.
`data.payload.connection_id`	string	Call Control App ID (formerly Telnyx connection ID) used in the call.
`data.payload.call_leg_id`	string	ID that is unique to the call and can be used to correlate webhook events.
`data.payload.call_session_id`	string	ID that is unique to the call session and can be used to correlate webhook events.
`data.payload.client_state`	string	State received from a command.
`data.payload.calling_party_type`	enum: pstn, sip	The type of calling party connection.
`data.payload.insight_group_id`	string	ID that is unique to the insight group being generated for the call.
`data.payload.results`	array[object]	Array of insight results being generated for the call.

callDtmfReceived

Field	Type	Description
`data.record_type`	enum: event	Identifies the type of the resource.
`data.event_type`	enum: call.dtmf.received	The type of event being delivered.
`data.id`	uuid	Identifies the type of resource.
`data.occurred_at`	date-time	ISO 8601 datetime of when the event occurred.
`data.payload.call_control_id`	string	Call ID used to issue commands via Call Control API.
`data.payload.connection_id`	string	Identifies the type of resource.
`data.payload.call_leg_id`	string	ID that is unique to the call and can be used to correlate webhook events.
`data.payload.call_session_id`	string	ID that is unique to the call session and can be used to correlate webhook events.
`data.payload.client_state`	string	State received from a command.
`data.payload.from`	string	Number or SIP URI placing the call.
`data.payload.to`	string	Destination number or SIP URI of the call.
`data.payload.digit`	string	The received DTMF digit or symbol.

callMachineDetectionEnded

Field	Type	Description
`data.record_type`	enum: event	Identifies the type of the resource.
`data.event_type`	enum: call.machine.detection.ended	The type of event being delivered.
`data.id`	uuid	Identifies the type of resource.
`data.occurred_at`	date-time	ISO 8601 datetime of when the event occurred.
`data.payload.call_control_id`	string	Call ID used to issue commands via Call Control API.
`data.payload.connection_id`	string	Call Control App ID (formerly Telnyx connection ID) used in the call.
`data.payload.call_leg_id`	string	ID that is unique to the call and can be used to correlate webhook events.
`data.payload.call_session_id`	string	ID that is unique to the call session and can be used to correlate webhook events.
`data.payload.client_state`	string	State received from a command.
`data.payload.from`	string	Number or SIP URI placing the call.
`data.payload.to`	string	Destination number or SIP URI of the call.
`data.payload.result`	enum: human, machine, not_sure	Answering machine detection result.

callMachineGreetingEnded

Field	Type	Description
`data.record_type`	enum: event	Identifies the type of the resource.
`data.event_type`	enum: call.machine.greeting.ended	The type of event being delivered.
`data.id`	uuid	Identifies the type of resource.
`data.occurred_at`	date-time	ISO 8601 datetime of when the event occurred.
`data.payload.call_control_id`	string	Call ID used to issue commands via Call Control API.
`data.payload.connection_id`	string	Call Control App ID (formerly Telnyx connection ID) used in the call.
`data.payload.call_leg_id`	string	ID that is unique to the call and can be used to correlate webhook events.
`data.payload.call_session_id`	string	ID that is unique to the call session and can be used to correlate webhook events.
`data.payload.client_state`	string	State received from a command.
`data.payload.from`	string	Number or SIP URI placing the call.
`data.payload.to`	string	Destination number or SIP URI of the call.
`data.payload.result`	enum: beep_detected, ended, not_sure	Answering machine greeting ended result.

callMachinePremiumDetectionEnded

Field	Type	Description
`data.record_type`	enum: event	Identifies the type of the resource.
`data.event_type`	enum: call.machine.premium.detection.ended	The type of event being delivered.
`data.id`	uuid	Identifies the type of resource.
`data.occurred_at`	date-time	ISO 8601 datetime of when the event occurred.
`data.payload.call_control_id`	string	Call ID used to issue commands via Call Control API.
`data.payload.connection_id`	string	Call Control App ID (formerly Telnyx connection ID) used in the call.
`data.payload.call_leg_id`	string	ID that is unique to the call and can be used to correlate webhook events.
`data.payload.call_session_id`	string	ID that is unique to the call session and can be used to correlate webhook events.
`data.payload.client_state`	string	State received from a command.
`data.payload.from`	string	Number or SIP URI placing the call.
`data.payload.to`	string	Destination number or SIP URI of the call.
`data.payload.result`	enum: human_residence, human_business, machine, silence, fax_detected, not_sure	Premium Answering Machine Detection result.

callMachinePremiumGreetingEnded

Field	Type	Description
`data.record_type`	enum: event	Identifies the type of the resource.
`data.event_type`	enum: call.machine.premium.greeting.ended	The type of event being delivered.
`data.id`	uuid	Identifies the type of resource.
`data.occurred_at`	date-time	ISO 8601 datetime of when the event occurred.
`data.payload.call_control_id`	string	Call ID used to issue commands via Call Control API.
`data.payload.connection_id`	string	Call Control App ID (formerly Telnyx connection ID) used in the call.
`data.payload.call_leg_id`	string	ID that is unique to the call and can be used to correlate webhook events.
`data.payload.call_session_id`	string	ID that is unique to the call session and can be used to correlate webhook events.
`data.payload.client_state`	string	State received from a command.
`data.payload.from`	string	Number or SIP URI placing the call.
`data.payload.to`	string	Destination number or SIP URI of the call.
`data.payload.result`	enum: beep_detected, no_beep_detected	Premium Answering Machine Greeting Ended result.

callReferCompleted

Field	Type	Description
`data.record_type`	enum: event	Identifies the type of the resource.
`data.event_type`	enum: call.refer.completed	The type of event being delivered.
`data.id`	uuid	Identifies the type of resource.
`data.occurred_at`	date-time	ISO 8601 datetime of when the event occurred.
`data.payload.call_control_id`	string	Unique ID for controlling the call.
`data.payload.call_leg_id`	string	ID that is unique to the call and can be used to correlate webhook events.
`data.payload.call_session_id`	string	ID that is unique to the call session and can be used to correlate webhook events.
`data.payload.connection_id`	string	Call Control App ID (formerly Telnyx connection ID) used in the call.
`data.payload.client_state`	string	State received from a command.
`data.payload.from`	string	Number or SIP URI placing the call.
`data.payload.sip_notify_response`	integer	SIP NOTIFY event status for tracking the REFER attempt.
`data.payload.to`	string	Destination number or SIP URI of the call.

callReferFailed

Field	Type	Description
`data.record_type`	enum: event	Identifies the type of the resource.
`data.event_type`	enum: call.refer.failed	The type of event being delivered.
`data.id`	uuid	Identifies the type of resource.
`data.occurred_at`	date-time	ISO 8601 datetime of when the event occurred.
`data.payload.call_control_id`	string	Unique ID for controlling the call.
`data.payload.call_leg_id`	string	ID that is unique to the call and can be used to correlate webhook events.
`data.payload.call_session_id`	string	ID that is unique to the call session and can be used to correlate webhook events.
`data.payload.connection_id`	string	Call Control App ID (formerly Telnyx connection ID) used in the call.
`data.payload.client_state`	string	State received from a command.
`data.payload.from`	string	Number or SIP URI placing the call.
`data.payload.sip_notify_response`	integer	SIP NOTIFY event status for tracking the REFER attempt.
`data.payload.to`	string	Destination number or SIP URI of the call.

callReferStarted

Field	Type	Description
`data.record_type`	enum: event	Identifies the type of the resource.
`data.event_type`	enum: call.refer.started	The type of event being delivered.
`data.id`	uuid	Identifies the type of resource.
`data.occurred_at`	date-time	ISO 8601 datetime of when the event occurred.
`data.payload.call_control_id`	string	Unique ID for controlling the call.
`data.payload.call_leg_id`	string	ID that is unique to the call and can be used to correlate webhook events.
`data.payload.call_session_id`	string	ID that is unique to the call session and can be used to correlate webhook events.
`data.payload.connection_id`	string	Call Control App ID (formerly Telnyx connection ID) used in the call.
`data.payload.client_state`	string	State received from a command.
`data.payload.from`	string	Number or SIP URI placing the call.
`data.payload.sip_notify_response`	integer	SIP NOTIFY event status for tracking the REFER attempt.
`data.payload.to`	string	Destination number or SIP URI of the call.

callSiprecFailed

Field	Type	Description
`data.record_type`	enum: event	Identifies the resource.
`data.event_type`	enum: siprec.failed	The type of event being delivered.
`data.id`	uuid	Identifies the type of resource.
`data.occurred_at`	date-time	ISO 8601 datetime of when the event occurred.
`data.payload.call_control_id`	string	Call ID used to issue commands via Call Control API.
`data.payload.connection_id`	string	Call Control App ID (formerly Telnyx connection ID) used in the call.
`data.payload.call_leg_id`	string	ID that is unique to the call and can be used to correlate webhook events.
`data.payload.call_session_id`	string	ID that is unique to the call session and can be used to correlate webhook events.
`data.payload.client_state`	string	State received from a command.
`data.payload.failure_cause`	string	Q850 reason why siprec session failed.

callSiprecStarted

Field	Type	Description
`data.record_type`	enum: event	Identifies the type of the resource.
`data.event_type`	enum: siprec.started	The type of event being delivered.
`data.id`	uuid	Identifies the type of resource.
`data.occurred_at`	date-time	ISO 8601 datetime of when the event occurred.
`data.payload.call_control_id`	string	Call ID used to issue commands via Call Control API.
`data.payload.connection_id`	string	Call Control App ID (formerly Telnyx connection ID) used in the call.
`data.payload.call_leg_id`	string	ID that is unique to the call and can be used to correlate webhook events.
`data.payload.call_session_id`	string	ID that is unique to the call session and can be used to correlate webhook events.
`data.payload.client_state`	string	State received from a command.

callSiprecStopped

Field	Type	Description
`data.record_type`	enum: event	Identifies the type of the resource.
`data.event_type`	enum: siprec.stopped	The type of event being delivered.
`data.id`	uuid	Identifies the type of resource.
`data.occurred_at`	date-time	ISO 8601 datetime of when the event occurred.
`data.payload.call_control_id`	string	Call ID used to issue commands via Call Control API.
`data.payload.connection_id`	string	Call Control App ID (formerly Telnyx connection ID) used in the call.
`data.payload.call_leg_id`	string	ID that is unique to the call and can be used to correlate webhook events.
`data.payload.call_session_id`	string	ID that is unique to the call session and can be used to correlate webhook events.
`data.payload.client_state`	string	State received from a command.
`data.payload.hangup_cause`	string	Q850 reason why the SIPREC session was stopped.