What it does

Telnyx Sip - 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: 401 invalid API key, 403 insufficient permissions, 404 resource not found, 422 validation error (check field formats), 429 rate limited (retry with exponential backoff).

Important Notes

Pagination: List endpoints return paginated results. Use page[number] and page[size] query parameters to navigate pages. Check meta.total_pages in the response.

List all Access IP Ranges

GET /access_ip_ranges

curl -H "Authorization: Bearer $TELNYX_API_KEY" "https://api.telnyx.com/v2/access_ip_ranges"

Returns: cidr_block (string), created_at (date-time), description (string), id (string), status (enum: pending, added), updated_at (date-time), user_id (string)

Create new Access IP Range

POST /access_ip_ranges — Required: cidr_block

Optional: description (string)

curl \
  -X POST \
  -H "Authorization: Bearer $TELNYX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "cidr_block": "203.0.113.0/24"
}' \
  "https://api.telnyx.com/v2/access_ip_ranges"

Returns: cidr_block (string), created_at (date-time), description (string), id (string), status (enum: pending, added), updated_at (date-time), user_id (string)

Delete access IP ranges

DELETE /access_ip_ranges/{access_ip_range_id}

curl \
  -X DELETE \
  -H "Authorization: Bearer $TELNYX_API_KEY" \
  "https://api.telnyx.com/v2/access_ip_ranges/550e8400-e29b-41d4-a716-446655440000"

Returns: cidr_block (string), created_at (date-time), description (string), id (string), status (enum: pending, added), updated_at (date-time), user_id (string)

List connections

Returns a list of your connections irrespective of type.

GET /connections

curl -H "Authorization: Bearer $TELNYX_API_KEY" "https://api.telnyx.com/v2/connections?sort=connection_name"

Returns: active (boolean), anchorsite_override (enum: Latency, Chicago, IL, Ashburn, VA, San Jose, CA, Sydney, Australia, Amsterdam, Netherlands, London, UK, Toronto, Canada, Vancouver, Canada, Frankfurt, Germany), connection_name (string), created_at (string), id (string), outbound_voice_profile_id (string), record_type (string), tags (array[string]), updated_at (string), webhook_api_version (enum: 1, 2), webhook_event_failover_url (uri), webhook_event_url (uri)

Retrieve a connection

Retrieves the high-level details of an existing connection. To retrieve specific authentication information, use the endpoint for the specific connection type.

GET /connections/{id}

curl -H "Authorization: Bearer $TELNYX_API_KEY" "https://api.telnyx.com/v2/connections/550e8400-e29b-41d4-a716-446655440000"

Returns: active (boolean), anchorsite_override (enum: Latency, Chicago, IL, Ashburn, VA, San Jose, CA, Sydney, Australia, Amsterdam, Netherlands, London, UK, Toronto, Canada, Vancouver, Canada, Frankfurt, Germany), connection_name (string), created_at (string), id (string), outbound_voice_profile_id (string), record_type (string), tags (array[string]), updated_at (string), webhook_api_version (enum: 1, 2), webhook_event_failover_url (uri), webhook_event_url (uri)

List credential connections

Returns a list of your credential connections.

GET /credential_connections

curl -H "Authorization: Bearer $TELNYX_API_KEY" "https://api.telnyx.com/v2/credential_connections?sort=connection_name"

Returns: active (boolean), anchorsite_override (enum: Latency, Chicago, IL, Ashburn, VA, San Jose, CA, Sydney, Australia, Amsterdam, Netherlands, London, UK, Toronto, Canada, Vancouver, Canada, Frankfurt, Germany), android_push_credential_id (string | null), call_cost_in_webhooks (boolean), connection_name (string), created_at (string), default_on_hold_comfort_noise_enabled (boolean), dtmf_type (enum: RFC 2833, Inband, SIP INFO), encode_contact_header_enabled (boolean), encrypted_media (enum: SRTP, None), id (string), inbound (object), ios_push_credential_id (string | null), jitter_buffer (object), noise_suppression (enum: inbound, outbound, both, disabled), noise_suppression_details (object), onnet_t38_passthrough_enabled (boolean), outbound (object), password (string), record_type (string), rtcp_settings (object), sip_uri_calling_preference (enum: disabled, unrestricted, internal), tags (array[string]), updated_at (string), user_name (string), webhook_api_version (enum: 1, 2), webhook_event_failover_url (uri), webhook_event_url (uri), webhook_timeout_secs (integer | null)

Create a credential connection

Creates a credential connection.

POST /credential_connections — Required: user_name, password, connection_name

Optional: active (boolean), anchorsite_override (enum: Latency, Chicago, IL, Ashburn, VA, San Jose, CA, Sydney, Australia, Amsterdam, Netherlands, London, UK, Toronto, Canada, Vancouver, Canada, Frankfurt, Germany), android_push_credential_id (string | null), call_cost_in_webhooks (boolean), default_on_hold_comfort_noise_enabled (boolean), dtmf_type (enum: RFC 2833, Inband, SIP INFO), encode_contact_header_enabled (boolean), encrypted_media (enum: SRTP, None), inbound (object), ios_push_credential_id (string | null), jitter_buffer (object), noise_suppression (enum: inbound, outbound, both, disabled), noise_suppression_details (object), onnet_t38_passthrough_enabled (boolean), outbound (object), rtcp_settings (object), sip_uri_calling_preference (enum: disabled, unrestricted, internal), tags (array[string]), webhook_api_version (enum: 1, 2, texml), webhook_event_failover_url (uri), webhook_event_url (uri), webhook_timeout_secs (integer | null)

curl \
  -X POST \
  -H "Authorization: Bearer $TELNYX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "user_name": "myusername123",
  "password": "my123secure456password789",
  "connection_name": "office-connection"
}' \
  "https://api.telnyx.com/v2/credential_connections"

Returns: active (boolean), anchorsite_override (enum: Latency, Chicago, IL, Ashburn, VA, San Jose, CA, Sydney, Australia, Amsterdam, Netherlands, London, UK, Toronto, Canada, Vancouver, Canada, Frankfurt, Germany), android_push_credential_id (string | null), call_cost_in_webhooks (boolean), connection_name (string), created_at (string), default_on_hold_comfort_noise_enabled (boolean), dtmf_type (enum: RFC 2833, Inband, SIP INFO), encode_contact_header_enabled (boolean), encrypted_media (enum: SRTP, None), id (string), inbound (object), ios_push_credential_id (string | null), jitter_buffer (object), noise_suppression (enum: inbound, outbound, both, disabled), noise_suppression_details (object), onnet_t38_passthrough_enabled (boolean), outbound (object), password (string), record_type (string), rtcp_settings (object), sip_uri_calling_preference (enum: disabled, unrestricted, internal), tags (array[string]), updated_at (string), user_name (string), webhook_api_version (enum: 1, 2), webhook_event_failover_url (uri), webhook_event_url (uri), webhook_timeout_secs (integer | null)

Retrieve a credential connection

Retrieves the details of an existing credential connection.

GET /credential_connections/{id}

curl -H "Authorization: Bearer $TELNYX_API_KEY" "https://api.telnyx.com/v2/credential_connections/550e8400-e29b-41d4-a716-446655440000"

Returns: active (boolean), anchorsite_override (enum: Latency, Chicago, IL, Ashburn, VA, San Jose, CA, Sydney, Australia, Amsterdam, Netherlands, London, UK, Toronto, Canada, Vancouver, Canada, Frankfurt, Germany), android_push_credential_id (string | null), call_cost_in_webhooks (boolean), connection_name (string), created_at (string), default_on_hold_comfort_noise_enabled (boolean), dtmf_type (enum: RFC 2833, Inband, SIP INFO), encode_contact_header_enabled (boolean), encrypted_media (enum: SRTP, None), id (string), inbound (object), ios_push_credential_id (string | null), jitter_buffer (object), noise_suppression (enum: inbound, outbound, both, disabled), noise_suppression_details (object), onnet_t38_passthrough_enabled (boolean), outbound (object), password (string), record_type (string), rtcp_settings (object), sip_uri_calling_preference (enum: disabled, unrestricted, internal), tags (array[string]), updated_at (string), user_name (string), webhook_api_version (enum: 1, 2), webhook_event_failover_url (uri), webhook_event_url (uri), webhook_timeout_secs (integer | null)

Update a credential connection

Updates settings of an existing credential connection.

PATCH /credential_connections/{id}

Optional: active (boolean), anchorsite_override (enum: Latency, Chicago, IL, Ashburn, VA, San Jose, CA, Sydney, Australia, Amsterdam, Netherlands, London, UK, Toronto, Canada, Vancouver, Canada, Frankfurt, Germany), android_push_credential_id (string | null), call_cost_in_webhooks (boolean), connection_name (string), default_on_hold_comfort_noise_enabled (boolean), dtmf_type (enum: RFC 2833, Inband, SIP INFO), encode_contact_header_enabled (boolean), encrypted_media (enum: SRTP, None), inbound (object), ios_push_credential_id (string | null), jitter_buffer (object), noise_suppression (enum: inbound, outbound, both, disabled), noise_suppression_details (object), onnet_t38_passthrough_enabled (boolean), outbound (object), password (string), rtcp_settings (object), sip_uri_calling_preference (enum: disabled, unrestricted, internal), tags (array[string]), user_name (string), webhook_api_version (enum: 1, 2), webhook_event_failover_url (uri), webhook_event_url (uri), webhook_timeout_secs (integer | null)

curl \
  -X PATCH \
  -H "Authorization: Bearer $TELNYX_API_KEY" \
  -H "Content-Type: application/json" \
  "https://api.telnyx.com/v2/credential_connections/550e8400-e29b-41d4-a716-446655440000"

Returns: active (boolean), anchorsite_override (enum: Latency, Chicago, IL, Ashburn, VA, San Jose, CA, Sydney, Australia, Amsterdam, Netherlands, London, UK, Toronto, Canada, Vancouver, Canada, Frankfurt, Germany), android_push_credential_id (string | null), call_cost_in_webhooks (boolean), connection_name (string), created_at (string), default_on_hold_comfort_noise_enabled (boolean), dtmf_type (enum: RFC 2833, Inband, SIP INFO), encode_contact_header_enabled (boolean), encrypted_media (enum: SRTP, None), id (string), inbound (object), ios_push_credential_id (string | null), jitter_buffer (object), noise_suppression (enum: inbound, outbound, both, disabled), noise_suppression_details (object), onnet_t38_passthrough_enabled (boolean), outbound (object), password (string), record_type (string), rtcp_settings (object), sip_uri_calling_preference (enum: disabled, unrestricted, internal), tags (array[string]), updated_at (string), user_name (string), webhook_api_version (enum: 1, 2), webhook_event_failover_url (uri), webhook_event_url (uri), webhook_timeout_secs (integer | null)

Delete a credential connection

Deletes an existing credential connection.

DELETE /credential_connections/{id}

curl \
  -X DELETE \
  -H "Authorization: Bearer $TELNYX_API_KEY" \
  "https://api.telnyx.com/v2/credential_connections/550e8400-e29b-41d4-a716-446655440000"

Returns: active (boolean), anchorsite_override (enum: Latency, Chicago, IL, Ashburn, VA, San Jose, CA, Sydney, Australia, Amsterdam, Netherlands, London, UK, Toronto, Canada, Vancouver, Canada, Frankfurt, Germany), android_push_credential_id (string | null), call_cost_in_webhooks (boolean), connection_name (string), created_at (string), default_on_hold_comfort_noise_enabled (boolean), dtmf_type (enum: RFC 2833, Inband, SIP INFO), encode_contact_header_enabled (boolean), encrypted_media (enum: SRTP, None), id (string), inbound (object), ios_push_credential_id (string | null), jitter_buffer (object), noise_suppression (enum: inbound, outbound, both, disabled), noise_suppression_details (object), onnet_t38_passthrough_enabled (boolean), outbound (object), password (string), record_type (string), rtcp_settings (object), sip_uri_calling_preference (enum: disabled, unrestricted, internal), tags (array[string]), updated_at (string), user_name (string), webhook_api_version (enum: 1, 2), webhook_event_failover_url (uri), webhook_event_url (uri), webhook_timeout_secs (integer | null)

Check a Credential Connection Registration Status

Checks the registration_status for a credential connection, (registration_status) as well as the timestamp for the last SIP registration event (registration_status_updated_at)

POST /credential_connections/{id}/actions/check_registration_status

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

Returns: ip_address (string), last_registration (string), port (integer), record_type (string), sip_username (string), status (enum: Not Applicable, Not Registered, Failed, Expired, Registered, Unregistered), transport (string), user_agent (string)

List FQDN connections

Returns a list of your FQDN connections.

GET /fqdn_connections

curl -H "Authorization: Bearer $TELNYX_API_KEY" "https://api.telnyx.com/v2/fqdn_connections?sort=connection_name"

Returns: active (boolean), adjust_dtmf_timestamp (boolean), anchorsite_override (enum: Latency, Chicago, IL, Ashburn, VA, San Jose, CA, Sydney, Australia, Amsterdam, Netherlands, London, UK, Toronto, Canada, Vancouver, Canada, Frankfurt, Germany), android_push_credential_id (string | null), call_cost_enabled (boolean), call_cost_in_webhooks (boolean), connection_name (string), created_at (string), default_on_hold_comfort_noise_enabled (boolean), dtmf_type (enum: RFC 2833, Inband, SIP INFO), encode_contact_header_enabled (boolean), encrypted_media (enum: SRTP, None), id (string), ignore_dtmf_duration (boolean), ignore_mark_bit (boolean), inbound (object), ios_push_credential_id (string | null), jitter_buffer (object), microsoft_teams_sbc (boolean), noise_suppression (enum: inbound, outbound, both, disabled), noise_suppression_details (object), onnet_t38_passthrough_enabled (boolean), outbound (object), password (string), record_type (string), rtcp_settings (object), rtp_pass_codecs_on_stream_change (boolean), send_normalized_timestamps (boolean), tags (array[string]), third_party_control_enabled (boolean), transport_protocol (enum: UDP, TCP, TLS), txt_name (string), txt_ttl (integer), txt_value (string), updated_at (string), user_name (string), webhook_api_version (enum: 1, 2), webhook_event_failover_url (uri), webhook_event_url (uri), webhook_timeout_secs (integer | null)

Create an FQDN connection

Creates a FQDN connection.

POST /fqdn_connections — Required: connection_name

Optional: active (boolean), anchorsite_override (enum: Latency, Chicago, IL, Ashburn, VA, San Jose, CA, Sydney, Australia, Amsterdam, Netherlands, London, UK, Toronto, Canada, Vancouver, Canada, Frankfurt, Germany), android_push_credential_id (string | null), call_cost_in_webhooks (boolean), default_on_hold_comfort_noise_enabled (boolean), dtmf_type (enum: RFC 2833, Inband, SIP INFO), encode_contact_header_enabled (boolean), encrypted_media (enum: SRTP, None), inbound (object), ios_push_credential_id (string | null), jitter_buffer (object), microsoft_teams_sbc (boolean), noise_suppression (enum: inbound, outbound, both, disabled), noise_suppression_details (object), onnet_t38_passthrough_enabled (boolean), outbound (object), rtcp_settings (object), tags (array[string]), transport_protocol (enum: UDP, TCP, TLS), webhook_api_version (enum: 1, 2), webhook_event_failover_url (uri), webhook_event_url (uri), webhook_timeout_secs (integer | null)

curl \
  -X POST \
  -H "Authorization: Bearer $TELNYX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "connection_name": "office-connection"
}' \
  "https://api.telnyx.com/v2/fqdn_connections"

Returns: active (boolean), adjust_dtmf_timestamp (boolean), anchorsite_override (enum: Latency, Chicago, IL, Ashburn, VA, San Jose, CA, Sydney, Australia, Amsterdam, Netherlands, London, UK, Toronto, Canada, Vancouver, Canada, Frankfurt, Germany), android_push_credential_id (string | null), call_cost_enabled (boolean), call_cost_in_webhooks (boolean), connection_name (string), created_at (string), default_on_hold_comfort_noise_enabled (boolean), dtmf_type (enum: RFC 2833, Inband, SIP INFO), encode_contact_header_enabled (boolean), encrypted_media (enum: SRTP, None), id (string), ignore_dtmf_duration (boolean), ignore_mark_bit (boolean), inbound (object), ios_push_credential_id (string | null), jitter_buffer (object), microsoft_teams_sbc (boolean), noise_suppression (enum: inbound, outbound, both, disabled), noise_suppression_details (object), onnet_t38_passthrough_enabled (boolean), outbound (object), password (string), record_type (string), rtcp_settings (object), rtp_pass_codecs_on_stream_change (boolean), send_normalized_timestamps (boolean), tags (array[string]), third_party_control_enabled (boolean), transport_protocol (enum: UDP, TCP, TLS), txt_name (string), txt_ttl (integer), txt_value (string), updated_at (string), user_name (string), webhook_api_version (enum: 1, 2), webhook_event_failover_url (uri), webhook_event_url (uri), webhook_timeout_secs (integer | null)

Retrieve an FQDN connection

Retrieves the details of an existing FQDN connection.

GET /fqdn_connections/{id}

curl -H "Authorization: Bearer $TELNYX_API_KEY" "https://api.telnyx.com/v2/fqdn_connections/1293384261075731499"

Returns: active (boolean), adjust_dtmf_timestamp (boolean), anchorsite_override (enum: Latency, Chicago, IL, Ashburn, VA, San Jose, CA, Sydney, Australia, Amsterdam, Netherlands, London, UK, Toronto, Canada, Vancouver, Canada, Frankfurt, Germany), android_push_credential_id (string | null), call_cost_enabled (boolean), call_cost_in_webhooks (boolean), connection_name (string), created_at (string), default_on_hold_comfort_noise_enabled (boolean), dtmf_type (enum: RFC 2833, Inband, SIP INFO), encode_contact_header_enabled (boolean), encrypted_media (enum: SRTP, None), id (string), ignore_dtmf_duration (boolean), ignore_mark_bit (boolean), inbound (object), ios_push_credential_id (string | null), jitter_buffer (object), microsoft_teams_sbc (boolean), noise_suppression (enum: inbound, outbound, both, disabled), noise_suppression_details (object), onnet_t38_passthrough_enabled (boolean), outbound (object), password (string), record_type (string), rtcp_settings (object), rtp_pass_codecs_on_stream_change (boolean), send_normalized_timestamps (boolean), tags (array[string]), third_party_control_enabled (boolean), transport_protocol (enum: UDP, TCP, TLS), txt_name (string), txt_ttl (integer), txt_value (string), updated_at (string), user_name (string), webhook_api_version (enum: 1, 2), webhook_event_failover_url (uri), webhook_event_url (uri), webhook_timeout_secs (integer | null)

Update an FQDN connection

Updates settings of an existing FQDN connection.

PATCH /fqdn_connections/{id}

Optional: active (boolean), anchorsite_override (enum: Latency, Chicago, IL, Ashburn, VA, San Jose, CA, Sydney, Australia, Amsterdam, Netherlands, London, UK, Toronto, Canada, Vancouver, Canada, Frankfurt, Germany), android_push_credential_id (string | null), call_cost_in_webhooks (boolean), connection_name (string), default_on_hold_comfort_noise_enabled (boolean), dtmf_type (enum: RFC 2833, Inband, SIP INFO), encode_contact_header_enabled (boolean), encrypted_media (enum: SRTP, None), inbound (object), ios_push_credential_id (string | null), jitter_buffer (object), noise_suppression (enum: inbound, outbound, both, disabled), noise_suppression_details (object), onnet_t38_passthrough_enabled (boolean), outbound (object), rtcp_settings (object), tags (array[string]), transport_protocol (enum: UDP, TCP, TLS), webhook_api_version (enum: 1, 2), webhook_event_failover_url (uri), webhook_event_url (uri), webhook_timeout_secs (integer | null)

curl \
  -X PATCH \
  -H "Authorization: Bearer $TELNYX_API_KEY" \
  -H "Content-Type: application/json" \
  "https://api.telnyx.com/v2/fqdn_connections/1293384261075731499"

Returns: active (boolean), adjust_dtmf_timestamp (boolean), anchorsite_override (enum: Latency, Chicago, IL, Ashburn, VA, San Jose, CA, Sydney, Australia, Amsterdam, Netherlands, London, UK, Toronto, Canada, Vancouver, Canada, Frankfurt, Germany), android_push_credential_id (string | null), call_cost_enabled (boolean), call_cost_in_webhooks (boolean), connection_name (string), created_at (string), default_on_hold_comfort_noise_enabled (boolean), dtmf_type (enum: RFC 2833, Inband, SIP INFO), encode_contact_header_enabled (boolean), encrypted_media (enum: SRTP, None), id (string), ignore_dtmf_duration (boolean), ignore_mark_bit (boolean), inbound (object), ios_push_credential_id (string | null), jitter_buffer (object), microsoft_teams_sbc (boolean), noise_suppression (enum: inbound, outbound, both, disabled), noise_suppression_details (object), onnet_t38_passthrough_enabled (boolean), outbound (object), password (string), record_type (string), rtcp_settings (object), rtp_pass_codecs_on_stream_change (boolean), send_normalized_timestamps (boolean), tags (array[string]), third_party_control_enabled (boolean), transport_protocol (enum: UDP, TCP, TLS), txt_name (string), txt_ttl (integer), txt_value (string), updated_at (string), user_name (string), webhook_api_version (enum: 1, 2), webhook_event_failover_url (uri), webhook_event_url (uri), webhook_timeout_secs (integer | null)

Delete an FQDN connection

Deletes an FQDN connection.

DELETE /fqdn_connections/{id}

curl \
  -X DELETE \
  -H "Authorization: Bearer $TELNYX_API_KEY" \
  "https://api.telnyx.com/v2/fqdn_connections/1293384261075731499"

Returns: active (boolean), adjust_dtmf_timestamp (boolean), anchorsite_override (enum: Latency, Chicago, IL, Ashburn, VA, San Jose, CA, Sydney, Australia, Amsterdam, Netherlands, London, UK, Toronto, Canada, Vancouver, Canada, Frankfurt, Germany), android_push_credential_id (string | null), call_cost_enabled (boolean), call_cost_in_webhooks (boolean), connection_name (string), created_at (string), default_on_hold_comfort_noise_enabled (boolean), dtmf_type (enum: RFC 2833, Inband, SIP INFO), encode_contact_header_enabled (boolean), encrypted_media (enum: SRTP, None), id (string), ignore_dtmf_duration (boolean), ignore_mark_bit (boolean), inbound (object), ios_push_credential_id (string | null), jitter_buffer (object), microsoft_teams_sbc (boolean), noise_suppression (enum: inbound, outbound, both, disabled), noise_suppression_details (object), onnet_t38_passthrough_enabled (boolean), outbound (object), password (string), record_type (string), rtcp_settings (object), rtp_pass_codecs_on_stream_change (boolean), send_normalized_timestamps (boolean), tags (array[string]), third_party_control_enabled (boolean), transport_protocol (enum: UDP, TCP, TLS), txt_name (string), txt_ttl (integer), txt_value (string), updated_at (string), user_name (string), webhook_api_version (enum: 1, 2), webhook_event_failover_url (uri), webhook_event_url (uri), webhook_timeout_secs (integer | null)