---
title: "Loop email sent"
method: POST
path: "loopEmailSent"
tags: ["Webhooks"]
---

# Loop email sent

`POST loopEmailSent` (webhook)

Sent when a workflow email is sent to a contact. This event keeps its `loop` naming for compatibility (Loops was renamed to Workflows on May 6, 2026). This event fires for every contact in a workflow (for example, 1,000 recipients produces 1,000 events). Contains `loopId` and `loopName` plus `contactIdentity` and `email` objects. If the workflow was sent to one or more mailing lists, a `mailingLists` array is also included.

## Headers

- `webhook-id` string, required
- `webhook-timestamp` string, required
- `webhook-signature` string, required

## Payload

- WebhookLoopEmailSentPayload
  - `eventName` 'loop.email.sent', required
  - `eventTime` integer, required — Unix timestamp in seconds.
  - `webhookSchemaVersion` '1.0.0', required
  - `contactIdentity` WebhookContactIdentity, required
    - `id` string, required
    - `email` string, required
    - `userId` string, nullable, required
  - `loopId` string, required — The ID of the workflow.
  - `loopName` string, required — The name of the workflow.
  - `email` WebhookEmail, required
    - `id` string, required — The ID of the email.
    - `emailMessageId` string, required — The ID of the sent version of the campaign, workflow or transactional email.
    - `subject` string, required — The subject of the email.
  - `mailingLists` WebhookMailingList[], required — The mailing list(s) the email was sent to, or an empty array.
    - `id` string, required
    - `name` string, required
    - `description` string, nullable, required
    - `isPublic` boolean, required

## Acknowledgement `200`

Webhook received successfully. Return any 2xx status code to acknowledge delivery.

---

[API](https://skmtc.net/loops/apis/loops-openapi-spec.md) · [All operations](https://skmtc.net/loops/apis/loops-openapi-spec/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/loops/loops-openapi-spec/revisions/9cc087257f0d/schema)