---
title: "CO2 Low Subscription"
method: POST
path: "/subscribe/co2-low"
---

# CO2 Low Subscription

`POST /subscribe/co2-low`

## Request

- Base URL: `https://energy.halowerk.com`
- URL: `https://energy.halowerk.com/subscribe/co2-low`
- Auth: none declared

Webhook-Subscription für niedrige CO2-Intensität.

## Request body

- object
  - `webhook_url` string, uri, required
  - `threshold_ct_kwh` number
  - `threshold_g_kwh` number
  - `direction` 'above' | 'below'

## Response `200`

Result. Settled.

- object

## Other responses

- `400`: Request body does not match inputSchema. Nothing settled.
- `402`: Payment required — 0.10 USDC (per_request). The challenge carries accepts, description and inputSchema.
- `500`: Internal error. Nothing settled.

---

[API](https://skmtc.dev/halowerk/apis/halowerk-energy.md) · [All operations](https://skmtc.dev/halowerk/apis/halowerk-energy/llms.txt) · [OpenAPI document](https://skmtc.dev/halowerk/apis/halowerk-energy/revisions/59458d8c787e?raw)