generated: '2026-07-27'
method: searched
source: https://developers.kudosity.com/reference/webhooks-1 + openapi/kudosity-transmit-message-openapi-original.yml
spec_type: null
asyncapi_published: false
note: 'Kudosity publishes no AsyncAPI document. It does publish a real, API-managed webhook surface, captured
  here: v2 webhooks are created/listed/updated/deleted through the REST API with an event-type filter;
  v1 callbacks are configured in the UI or per send-sms call.'
transport:
  v2: HTTPS POST, JSON body
  v1: HTTPS GET, query-string parameters
management:
  v2: REST — POST/GET/PUT/DELETE /v2/webhook
  v1: account SETTINGS, per-feature Forward-to-URL, or send-sms parameters
events:
- name: SMS_STATUS
  api: v2
  description: 'SMS status change: sent, failed, soft_bounce, hard_bounce, delivered, undelivered. Multiple
    events per message.'
- name: SMS_INBOUND
  api: v2
  description: Inbound SMS from a recipient back to the sender.
- name: MMS_STATUS
  api: v2
  description: 'MMS status change (internal statuses: sent, failed).'
- name: MMS_INBOUND
  api: v2
  description: Inbound MMS from a recipient.
- name: WHATSAPP_STATUS
  api: v2
  description: 'WhatsApp message lifecycle: SENT, DELIVERED, READ, FAILED.'
- name: WHATSAPP_INBOUND
  api: v2
  description: Inbound WhatsApp message.
- name: RCS_STATUS
  api: v2
  description: 'RCS message lifecycle: SENT, DELIVERED, READ, FAILED.'
- name: RCS_INBOUND
  api: v2
  description: Inbound RCS message.
- name: LINK_HIT
  api: v2
  description: A recipient visited a tracked link.
- name: OPT_OUT
  api: v2
  description: A recipient opted out via link or by replying STOP.
- name: delivery (DLR) callback
  api: v1
  description: 'Delivery receipt. Params: message_id, mobile, datetime, status (delivered|pending|soft-bounce|hard-bounce),
    user_id.'
- name: reply callback
  api: v1
  description: 'SMS reply or inbound SMS. Params: user_id, message_id, mobile, longcode, datetime_entry,
    response, response_id, is_optout.'
- name: link hits callback
  api: v1
  description: Tracked tapth.is link clicked. Params include list_id, message_id, mobile, link_hits, firstname,
    lastname.
- name: list action callback
  api: v1
  description: 'Contact added to or removed from a list. Params: type (Add|Delete), datetime_entry, list_id,
    mobile, plus custom fields 1-10.'
filters:
  v2:
  - sender
  - status
  - message_ref
  - campaign_id
  note: Filter semantics differ by event class — status events filter the status payload, LINK_HIT/OPT_OUT
    filter the source_message, inbound events filter the recipient.
retries:
  v1: '4 attempts with increasing delay: 1 minute, 5 minutes, 1 hour, 24 hours'
  v2: retried on failure with a more granular schedule than v1
signing:
  header: x-transmitsms-signature
  algorithm: HMAC-SHA256 keyed by the account API secret
callback_priority:
- send-sms call parameter
- Forward-to-URL on the feature
- default URL in account SETTINGS