generated: '2026-08-13'
method: searched
source: >-
  https://api-doc.simpletexting.com/ — the "Webhooks" and "Webhook Reports" tags of
  SimpleTexting's published OpenAPI (harvested verbatim to
  openapi/_original/simpletexting-openapi.yml on 2026-08-13) and
  https://simpletexting.com/api/docs/ for the legacy v1 forwarding webhooks.
description: >-
  SimpleTexting's event surface. It publishes NO AsyncAPI document; the events are
  described in OpenAPI, where the callback payloads appear as three POST operations
  under the "Webhook Reports" tag whose servers[] is the CUSTOMER's domain
  (https://yourdomain.com/) — i.e. they document what SimpleTexting sends to you,
  not an endpoint you call. This artifact is the webhook catalog derived from those
  definitions, and it is why this repo carries `type: Webhooks` and not `type: AsyncAPI`.
asyncapi_published: false
transport: HTTPS POST callback with a JSON body
subscription_api:
  base: https://api-app2.simpletexting.com/v2
  operations:
    - {operationId: getWebhooks, method: GET, path: /api/webhooks, description: List webhook subscriptions.}
    - {operationId: createWebhook, method: POST, path: /api/webhooks, description: Create a webhook subscription.}
    - {operationId: updateWebhook, method: PUT, path: '/api/webhooks/{webhookId}', description: Update a subscription.}
    - {operationId: deleteWebhook, method: DELETE, path: '/api/webhooks/{webhookId}', description: Delete a subscription.}
  subscription_fields:
    url: Destination URL that will receive the POST.
    triggers: Array of one or more event triggers (see events below). Required.
    requestPerSecLimit: 'Maximum callbacks per second SimpleTexting will send to this URL. Integer, maximum 25.'
    accountPhone: 'Optional filter — deliver only events for this sending number.'
    contactPhone: 'Optional filter — deliver only events for this contact number.'
  ui: 'Also configurable in the web app under the Webhooks tab of API settings (app2.simpletexting.com).'
events:
  - name: INCOMING_MESSAGE
    description: A contact sent a message to one of your numbers.
    delivered_to: 'your endpoint (documented as POST /report/incoming, operationId incomingMessageReport)'
    payload_schema: SingleReportDtoWebhookMessageDto -> WebhookMessageDto
    payload_fields: [messageId, subject, mediaItems, text, accountPhone, contactPhone, timestamp, category, referenceType]
  - name: OUTGOING_MESSAGE
    description: An outgoing message was handled by the platform.
    delivered_to: 'your endpoint (documented as POST /report/incoming, operationId incomingMessageReport)'
    payload_schema: SingleReportDtoWebhookMessageDto -> WebhookMessageDto
  - name: DELIVERY_REPORT
    description: The carrier confirmed delivery of an outgoing message.
    delivered_to: 'your endpoint (documented as POST /report/delivery, operationId deliveryMessageReport)'
    payload_schema: SingleReportDtoWebhookDeliveryReportDto -> WebhookDeliveryReportDto
    payload_fields: [messageId, category, referenceType, accountPhone, contactPhone, carrier]
  - name: NON_DELIVERED_REPORT
    description: The carrier reported a failed delivery.
    delivered_to: 'your endpoint (documented as POST /report/delivery, operationId deliveryMessageReport)'
    payload_schema: SingleReportDtoWebhookDeliveryReportDto -> WebhookDeliveryReportDto
  - name: UNSUBSCRIBE_REPORT
    description: A contact texted STOP or was blocked, and is now unsubscribed.
    delivered_to: 'your endpoint (documented as POST /report/unsubscribe, operationId unsubscribeMessageReport)'
    payload_schema: SingleReportDtoWebhookUnsubscribeReportDto -> WebhookUnsubscribeReportDto
    payload_fields: [contactId, phone]
message_categories:
  SMS: Regular text, 160 characters or below (1 credit).
  EXTENDED_SMS: Above 160 and below 306 characters (2 credits).
  MMS: Multimedia, or above 306 characters (3 credits).
delivery_semantics:
  signing: >-
    NONE PUBLISHED. SimpleTexting documents no signature header, shared secret or
    verification procedure, so a receiver cannot cryptographically establish that a
    callback came from SimpleTexting.
  retries: Not documented.
  ordering: Not documented.
  throughput: Caller-capped by requestPerSecLimit (max 25 requests/second per subscription).
  expected_response: HTTP 200 (the report operations declare a 200 "OK" response).
legacy_v1:
  docs: https://simpletexting.com/api/docs/
  note: >-
    The v1 surface additionally offers SMS forwarding as an HTTP GET to your URL and MMS
    forwarding as a POST, alongside delivery and unsubscribe reports. Configured in the
    same Webhooks settings tab.