---
title: "Datagrams that were acknowledged and then could not be delivered (any member)"
method: GET
path: "/v1/projects/{project_id}/udp/rejects"
tags: ["udp"]
---

# Datagrams that were acknowledged and then could not be delivered (any member)

`GET /v1/projects/{project_id}/udp/rejects`

## Request

- Base URL: `https://api.wavehouse.cloud`
- URL: `https://api.wavehouse.cloud/v1/projects/{project_id}/udp/rejects`
- Auth: one of:
  - API key in cookie `whc_session`
  - HTTP bearer
  - API key in header `X-API-Key`

An ACK means the datagram was authenticated and durably written to the ingest log. It does NOT mean the payload decompressed, parsed, or reached the engine — those failures land here, with the plaintext bytes as sent, so the fix is made against what was actually on the wire. Unacknowledged first, newest first within each group.

## Path parameters

- `project_id` string, required

## Query parameters

- `limit` integer: page size; 0 or absent means 50
- `cursor` string: next_cursor from the previous page; absent for the first page

## Response `200`

OK

- UDPRejectPage
  - `data` UDPRejectView[], required
    - `acknowledged_at` string, date-time: absent while unacknowledged
    - `device_id` string, required: 16 hex characters
    - `engine_detail` string: the engine's own message, when it is what refused
    - `id` string, required
    - `payload` string, byte, required: base64 of the PLAINTEXT bytes as published — what the device actually sent
    - `reason` string, required
    - `received_at` string, date-time, required: when the edge accepted the datagram
    - `stage` string, required: inflate | content-type | engine — where delivery stopped
  - `next_cursor` string, nullable, required: pass as cursor to fetch the next page; null on the last page

## Other responses

- `429`: Rate limited, per client IP, API key or org; a client IP is also refused on every route for a while after repeated authentication failures. A limited operation carries RateLimit-Policy and RateLimit on every response; wait Retry-After seconds before retrying.
- `default`: Error

---

[API](https://skmtc.dev/wavehouse/apis/wavehouse-cloud-api.md) · [All operations](https://skmtc.dev/wavehouse/apis/wavehouse-cloud-api/llms.txt) · [OpenAPI document](https://skmtc.dev/wavehouse/apis/wavehouse-cloud-api/revisions/ddf93caac44e?raw)