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Webhook Quickstart

Create a Sink instance

You will need to install and set up the Twilio CLI for your account to use the following command.

To create a new Webhook Sink, run this command:

twilio api:events:v1:sinks:create --description <add sink description here> \
--sink-configuration '{"destination":"${your webhook endpoint}","method":"${POST or GET}","batch_events":${true or false}}' \
--sink-type webhook

For Webhook Sink, validation is optional and not required to start streaming events.

If we are unable to deliver events to your Sink due to a problem with the Sink, we send errors through Twilio Debugger. After the first error about Sink failure, we will continue to notify you every 20 minutes. The notification will include the Sink ID and error details.

Subscribe to Twilio events

Now that you have a valid Sink, you can subscribe to one or more events. Below are some of the available events. You can also view a full list of available events.

EventType

Schema Version

com.twilio.voice.insights.call-summary.partial

1

com.twilio.voice.insights.call-summary.predicted-complete

1

com.twilio.voice.insights.call-summary.complete

1

You can subscribe to any of these events by making an API call. This is done with the following command. The new subscription is configured to read the event-types from the --types argument — you’ll need the event type and schema version from the table above. The event-types you specify in the--types argument will be sent to the Sink specified by the --sink-sid argument. Use the Sink SID of the Sink you created above.

twilio api:events:v1:subscriptions:create --description <description> \
  --sink-sid <sink id validated above DGxxx> \
  --types '{"type": "<event_type>","schema_version": <version>}'

For instance, to subscribe to all call summary events, you would run:

twilio api:events:v1:subscriptions:create \
  --description "Subscription on 3 call_summary events" \
  --sink-sid <sink id validated above DGxxx> \
  --types '{"type":"com.twilio.voice.insights.call-summary.partial","schema_version":1}' \
  --types '{"type":"com.twilio.voice.insights.call-summary.predicted-complete","schema_version":1}' \
  --types '{"type":"com.twilio.voice.insights.call-summary.complete","schema_version":1}'

Read and parse the data

Data is sent to the webhook sinks as a JSON array of CloudEvents. If you set the batch_events parameter in the sink configuration to true, this array will have multiple events. Else, it will only contain one event.

Here’s a Voice Insights Call Summary Predicted Complete event, for example:

{
"specversion": "1.0",
"type": "com.twilio.voice.insights.call-summary.predicted-complete",
"source": "/v1/Voice/CA00000000000000000000000000000000/Summary",
"id": "EZ00000000000000000000000000000000",
"dataschema": "https://events-schemas.twilio.com/VoiceInsights.CallSummary/1",
"datacontenttype": "application/json",
"time": "2020-07-23T22:56:33.000Z",
"data": "{\"call_sid\":\"CA00000000000000000000000000000000\",\"account_sid\":\"AC00000000000000000000000000000000\",\"parent_call_sid\":\"\",\"parent_account_sid\":\"\",\"start_time\":\"2020-07-23T22:56:28Z\",\"end_time\":\"2020-07-23T22:56:33Z\",\"duration\":0,\"connect_duration\":0,\"call_type\":\"client\",\"call_state\":\"canceled\",\"from\":{\"caller\":\"+55555555\",\"callee\":\"\",\"carrier\":\"MEGA:CORP\",\"connection\":\"landline\",\"number_prefix\":\"5555\",\"location\":{\"lat\":0.0,\"lon\":-0.0},\"city\":\"\",\"country_code\":\"US\",\"country_subdivision\":\"\",\"ip_address\":\"\",\"sdk\":null},\"to\":{\"caller\":\"\",\"callee\":\"client:SOMECLIENT\",\"carrier\":\"\",\"connection\":\"twilio_sdk\",\"number_prefix\":\"\",\"location\":null,\"city\":\"\",\"country_code\":\"\",\"country_subdivision\":\"\",\"ip_address\":\"\",\"sdk\":null},\"processing_state\":\"partial\",\"processing_version\":1,\"sip_edge\":null,\"carrier_edge\":null,\"sdk_edge\":null,\"client_edge\":null,\"tags\":[],\"attributes\":null,\"properties\":{\"q850_cause\":0,\"last_sip_response_num\":0,\"pdd_ms\":0,\"route_id\":\"\",\"media_region\":\"unknown_realm\",\"signaling_region\":\"unknown_realm\",\"twilio_media_ip\":\"\",\"twilio_signaling_ip\":\"\",\"external_media_ip\":\"\",\"external_signaling_ip\":\"\",\"sip_call_id\":\"\",\"user_agent\":\"\",\"selected_region\":\"unknown_realm\",\"region\":\"unknown_realm\",\"trunk_sid\":\"\",\"disconnected_by\":\"unknown_disconnected_by\",\"direction\":\"outbound_api\",\"settings\":null}}"
}

The data field should meet its schema, which is the Voice Insights Call Summary schema in this case.

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