API · Webhooks

List Attempts

List recorded automatic and manual delivery attempts from the last 90 days, with response bodies limited to 4 KiB (requires full access). Only limit and after pagination are supported; before returns an error.

GET/webhooks/{webhook_id}/events/{event_id}/attemptsFull access

Request parameters

Parameter	Type	Description
`webhook_id` path · required	`string`	The Webhook ID.
`event_id` path · required	`string`	The Webhook Event ID.
`limit` query · optional	`integer` 1–100 Default: 20	Number of items to return.
`after` query · optional	`string`	Return items after this cursor.

Request example

Set OPENSEND_BASE_URL=https://api.example.com and OPENSEND_API_KEY=os_replace_me on your server.

bash

curl -X GET "$OPENSEND_BASE_URL/webhooks/YOUR_webhook_id/events/YOUR_event_id/attempts" \
  -H "Authorization: Bearer $OPENSEND_API_KEY"

Response

200 · application/json. Example IDs stand for IDs returned by your installation.

json

{
  "object": "list",
  "has_more": false,
  "data": [
    {
      "id": "atmpt_1srOrx2ZWZBpBUvZwXKQmoEYga2",
      "http_status_code": 200,
      "response": "{\"ok\":true}",
      "sent_at": "2026-08-22T15:33:12.000Z"
    }
  ]
}

Behavior and errors

Use limit and after; before is rejected. Responses are capped at 4 KiB and history expires after 90 days. Installations upgraded from a version that kept only the latest result have no earlier individual attempts.

Use a full-access credential. Unknown or foreign resources return 404. See authentication, errors, rate limits, and pagination.