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Debugging Events Webhook

When an error or warning takes places on your Twilio account, this event is published into Twilio's Debugging System. This is the system that powers the Monitor Alerts API, Alert Triggers and the Console Debugger.

The Console Debugger allows developers to configure an optional webhook to receive data about errors and warnings as they happen. This makes it easy for developers to react to problems with their application in a timely manner.

If the Console Debugger webhook is configured, Twilio will make an HTTP POST request debugging events as they occur. Below is an overview of the parameters passed.

Twilio can send your web application an HTTP request when certain events happen, such as an incoming text message to one of your Twilio phone numbers. These requests are called webhooks, or status callbacks. For more, check out our guide to Getting Started with Twilio Webhooks. Find other webhook pages, such as a security guide and an FAQ in the Webhooks section of the docs.

Debugging Event Callback Parameters

Property Description
Sid Unique identifier of this Debugger event.
AccountSid Unique identifier of the account that generated the Debugger event.
ParentAccountSid Unique identifier of the Parent Account. This parameter only exists if the above account is a subaccount.
Timestamp Time of occurrence of the Debugger event.
Level Severity of the Debugger event. Possible values are Error and Warning.
PayloadType application/json
Payload JSON data specific to the Debugging Event.


The payload is a JSON object that provides more information about the Debugging Event in question.

Property Description
resource_sid The ID of this Twilio Platform Resource that this error is associated with
service_sid The ID of the Twilio Platform Service that this error is associated with
error_code The unique error code for this debugging event
more_info A subdocument containing more information about this debugging event
webhook A subdocument containing Information about the request and response of the webhook associated with this debugging event.


The more_info property of the payload is optional and contains additional information specific to the Twilio product/feature that published this debugging event.


The webhook property of the payload is optional. It is only present if a webhook request was associated with the debugging event.

'request': {
  'method': 'POST',
  'url': '', 
  'headers': {
    'key': 'value' 
  'parameters': {
    'key': 'value' 
  'response': {
    'status_code': 200,
    'headers': {
      'key': 'value'
    'body': '<Response><Dial>800-421-9004</Dial></Response>'

Representative Example of a Debugging Event Webhook

This is an example of a debugging event webhook. The details of what will be in this webhook request depend on what type of error the Twilio Debugger handles. For this example, the webhook event was omitted for brevity, but an example of what it might look like is in the previous section.

This HTTP Body is sent as an HTTP POST to your webhook, and encoded as application/x-www-form-urlencoded. Within that request body, the Payload property is a JSON object that you would need to decode.

The X-Twilio-Signature HTTP header will be sent with this HTTP POST, and you should use it to validate that the request is indeed from Twilio. Learn more about Validating Signatures from Twilio

AccountSid	ACxxxxxxxxxxxxxxxxxxxxxxxx
Payload	{
    "msg":"An attempt to retrieve content from https://yyy.zzz returned the HTTP status code 404",
    "Msg":"An attempt to retrieve content from https://yyy.zzz returned the HTTP status code 404",
     "request": <Specific Twilio Request Details to your Webhook here as a JSON Object>
PayloadType	application/json
Sid	NOxxxxx
Timestamp	2020-01-01T23:28:54Z

Below is a cURL snippet based on the above example that you can customize to simulate a debugging event webhook.

curl -X "POST" "" \
     -H 'I-Twilio-Idempotency-Token: idempotency-token-goes-here' \
     -H 'X-Twilio-Signature: correct-signature-goes-here' \
     -H 'Content-Type: application/x-www-form-urlencoded; charset=utf-8' \
     --data-urlencode "AccountSid=ACxxxxxxxxxxxxxxxxxxxxxxxx" \
     --data-urlencode "Level=ERROR" \
     --data-urlencode "ParentAccountSid=" \
     --data-urlencode "Payload={
    \"msg\":\"An attempt to retrieve content from https://yyy.zzz returned the HTTP status code 404\",
    \"Msg\":\"An attempt to retrieve content from https://yyy.zzz returned the HTTP status code 404\",
     \"request\": {}  }
}" \
     --data-urlencode "PayloadType=application/json" \
     --data-urlencode "Sid=NOxxxxx" \
     --data-urlencode "Timestamp=2020-01-01T23:28:54Z"
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Need some help?

We all do sometimes; code is hard. Get help now from our support team, or lean on the wisdom of the crowd by visiting Twilio's Stack Overflow Collective or browsing the Twilio tag on Stack Overflow.

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