---
title: "Mark in-app notification as seen"
method: POST
path: "/notifications/inapp/seen"
tags: ["notifications", "inapp"]
---

# Mark in-app notification as seen

`POST /notifications/inapp/seen`

Flips a single in-app row to seen=true.

## Request body

- InappMarkSeenInput
  - `notification_id` string, required

## Response `200`

OK

- InappAck
  - `ok` boolean

## Other responses

- `default` — Error response.

## Changes

- **2026-08-06** `fe2041c5ba86` — 1 warning
  - changed the pattern of the request property `notification_id` from `^ntfy_[0-9a-hjkmnp-tv-z]{26}$` to `^ntfy_[0-7][0-9a-hjkmnp-tv-z]{25}$`

[Change history](https://skmtc.dev/stablesea/apis/stable-sea-backend/changes/notifications/inapp/seen/post.md)

---

[API](https://skmtc.dev/stablesea/apis/stable-sea-backend.md) · [All operations](https://skmtc.dev/stablesea/apis/stable-sea-backend/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/stablesea/stable-sea-backend/revisions/adba5ad114cf/schema)