> ## Documentation Index
> Fetch the complete documentation index at: https://developers.manglai.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Emission Factors

> Custom emission factors

## Description

**Custom emission factors** let you use your own values when standard ones don't apply.

## Endpoint

```
GET /api/v1/emission-factors/custom?companyId=UUID
```

## Usage in consumptions

If you have a custom factor, send its ID in `emissionEntityId` when creating a consumption:

```json theme={null}
{
  "emissionEntityId": "218b2369-b86d-4517-a9f0-392d5f9e80e3"
}
```