---
title: "Add up to 100 BFE numbers to your watchlist"
method: POST
path: "/v1/overvaagning/ejendomme"
---

# Add up to 100 BFE numbers to your watchlist

`POST /v1/overvaagning/ejendomme`

## Request

- Base URL: `https://api.grundfast.dk`
- URL: `https://api.grundfast.dk/v1/overvaagning/ejendomme`
- Auth: one of:
  - HTTP bearer
  - API key in cookie `gf_session`

Each watched property is re-read about once a day from BBR, ejendomsvurdering, plandata and områdeklassificering; a change in any of them fires an `ejendom.aendret` webhook with the changed registers and a before/after summary. The first check is a silent baseline. The watchlist is capped per plan.

## Request body

- object
  - `bfe` integer[], required
  - `note` string

## Response `201`

Added (already-watched BFEs are reported, not duplicated)

## Other responses

- `400`: Error
- `401`: Error
- `402`: Error
- `409`: Error
- `429`: Error

---

[API](https://skmtc.dev/grundfast/apis/grundfast-api.md) · [All operations](https://skmtc.dev/grundfast/apis/grundfast-api/llms.txt) · [OpenAPI document](https://skmtc.dev/grundfast/apis/grundfast-api/revisions/ccef6e299bb5?raw)