---
title: Custom API
description: Custom Widget Configuration from the API
---

This widget can show information from custom self-hosted or third party API.

Fields need to be defined in the `mappings` section YAML object to correlate with the value in the APIs JSON object. Final field definition needs to be the key with the desired value information.

```yaml
widget:
  type: customapi
  url: http://custom.api.host.or.ip:port/path/to/exact/api/endpoint
  refreshInterval: 10000 # optional - in milliseconds, defaults to 10s
  username: username # auth - optional
  password: password # auth - optional
  method: GET # optional, e.g. POST
  headers: # optional, must be object, see below
  display: # optional, default to block, see below
  mappings:
    - field: key # needs to be YAML string or object
      label: Field 1
      format: text # optional - defaults to text
    - field: # needs to be YAML string or object
        path:
          to: key2
      format: number # optional - defaults to text
      label: Field 2
    - field: # needs to be YAML string or object
        path:
          to:
            another: key3
      label: Field 3
      format: percent # optional - defaults to text
    - field: key # needs to be YAML string or object
      label: Field 4
      format: date # optional - defaults to text
      locale: nl # optional
      dateStyle: long # optional - defaults to "long". Allowed values: `["full", "long", "medium", "short"]`.
      timeStyle: medium # optional - Allowed values: `["full", "long", "medium", "short"]`.
    - field: key # needs to be YAML string or object
      label: Field 5
      format: relativeDate # optional - defaults to text
      locale: nl # optional
      style: short # optional - defaults to "long". Allowed values: `["long", "short", "narrow"]`.
      numeric: auto # optional - defaults to "always". Allowed values `["always", "auto"]`.
```

Supported formats for the values are `text`, `number`, `float`, `percent`, `bytes`, `bitrate`, `date` and `relativeDate`.

The `dateStyle` and `timeStyle` options of the `date` format are passed directly to [Intl.DateTimeFormat](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/DateTimeFormat/DateTimeFormat) and the `style` and `numeric` options of `relativeDate` are passed to [Intl.RelativeTimeFormat](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/RelativeTimeFormat/RelativeTimeFormat).

## Example

For the following JSON object from the API:

```json
{
  "id": 1,
  "name": "Rick Sanchez",
  "status": "Alive",
  "species": "Human",
  "gender": "Male",
  "origin": {
    "name": "Earth (C-137)"
  },
  "locations": [
    {
      "name": "Earth (C-137)"
    },
    {
      "name": "Citadel of Ricks"
    }
  ]
}
```

Define the `mappings` section as an array, for example:

```yaml
mappings:
  - field: name # Rick Sanchez
    label: Name
  - field: status # Alive
    label: Status
  - field:
      origin: name # Earth (C-137)
    label: Origin
  - field:
      locations:
        1: name # Citadel of Ricks
    label: Location
```

## Data Transformation

You can manipulate data with the following tools `remap`, `scale` and `suffix`, for example:

```yaml
- field: key4
  label: Field 4
  format: text
  remap:
    - value: 0
      to: None
    - value: 1
      to: Connected
    - any: true # will map all other values
      to: Unknown
- field: key5
  label: Power
  format: float
  scale: 0.001 # can be number or string e.g. 1/16
  suffix: kW
```

## List View

You can change the default block view to a list view (similar to the Coin Market Cap widget) by setting the `display` option to `list`. The list view extends vertically to the proper height.

The list view utilizes extra space to display an additional field (which is optional) and to apply color to this additional field (also optional).

`additionalField`: Similar to the `field` option, but only used for the list view. It displays additional information for the mapping object on the right side of the `field`.

`additionalFieldColor`: Also list view only feature, it is used to color the additional field. 

Allowed options: `["auto", "theme", "black", "white"]`.

`auto` will use the color based on the value of the `additionalField`, green for positive numbers, red for negative numbers.

**Note:** Data transformation is still compatible with the list view, but the transformation only applies to the value of the `field`.

```yaml
- field: key
  label: Field
  format: text
  additionalField: another key # optional
  additionalFieldColor: auto # optional
  remap:
    - value: 0
      to: None
    - value: 1
      to: Connected
    - any: true # will map all other values
      to: Unknown
```

## Custom Headers

Pass custom headers using the `headers` option, for example:

```yaml
headers:
  X-API-Token: token
```