Get task field definitions

GET/v1/tasks/definitions

Returns the schema for the field and relationship definitions available on tasks. Useful for understanding the shape of task data before creating or updating records. See Fields and relationships for more details.

Required scope: tasks:read

Rate limit category: Read

ReturnsExpand Collapse

TaskDefinitionsResponse = object { fieldDefinitions, objectType, relationshipDefinitions }

fieldDefinitions: map[object { description, label, typeConfiguration, 3 more } ]

Map of field keys to their definitions, including both system and custom fields.

description: string

Description of the field, or null.

label: string

Human-readable display name of the field.

typeConfiguration: object { currency, handleService, multipleValues, 2 more }

Type-specific configuration (e.g. select options, currency code).

currency: optional string

ISO 4217 3-letter currency code.

handleService: optional "TWITTER" or "LINKEDIN" or "FACEBOOK" or "INSTAGRAM"

Social platform associated with this handle field.

Accepts one of the following:

"TWITTER"

"LINKEDIN"

"FACEBOOK"

"INSTAGRAM"

multipleValues: optional boolean

Whether this field accepts multiple values.

options: optional array of object { id, label, description }

Available options for select fields.

id: string

Unique identifier of the select option.

label: string

Human-readable display name of the option.

description: optional string

Description of the option, or null.

unique: optional boolean

Whether values for this field must be unique.

valueType: "ADDRESS" or "CHECKBOX" or "CURRENCY" or 11 more

Data type of the field.

Accepts one of the following:

"ADDRESS"

"CHECKBOX"

"CURRENCY"

"DATETIME"

"EMAIL"

"FULL_NAME"

"MARKDOWN"

"MULTI_SELECT"

"NUMBER"

"SINGLE_SELECT"

"SOCIAL_HANDLE"

"TELEPHONE"

"TEXT"

"URL"

id: optional string

Unique identifier of the field definition.

readOnly: optional boolean

true for fields that are not writable via the API (e.g. AI-generated summaries). false or absent for writable fields.

objectType: string

The object type these definitions belong to (e.g. account).

relationshipDefinitions: map[object { cardinality, description, label, 2 more } ]

Map of relationship keys to their definitions.

cardinality: "HAS_ONE" or "HAS_MANY"

Whether this is a has_one or has_many relationship.

Accepts one of the following:

"HAS_ONE"

"HAS_MANY"

description: string

Description of the relationship, or null.

label: string

Human-readable display name of the relationship.

objectType: string

The type of the related object (e.g. account, contact).

id: optional string

Unique identifier of the relationship definition.

Get task field definitions

curl https://api.lightfield.app/v1/tasks/definitions \
    -H 'Lightfield-Version: 2026-03-01' \
    -H "Authorization: Bearer $API_KEY"

{
  "fieldDefinitions": {
    "foo": {
      "description": "description",
      "label": "label",
      "typeConfiguration": {
        "currency": "currency",
        "handleService": "TWITTER",
        "multipleValues": true,
        "options": [
          {
            "id": "id",
            "label": "label",
            "description": "description"
          }
        ],
        "unique": true
      },
      "valueType": "ADDRESS",
      "id": "id",
      "readOnly": true
    }
  },
  "objectType": "objectType",
  "relationshipDefinitions": {
    "foo": {
      "cardinality": "HAS_ONE",
      "description": "description",
      "label": "label",
      "objectType": "objectType",
      "id": "id"
    }
  }
}

Returns Examples

{
  "fieldDefinitions": {
    "foo": {
      "description": "description",
      "label": "label",
      "typeConfiguration": {
        "currency": "currency",
        "handleService": "TWITTER",
        "multipleValues": true,
        "options": [
          {
            "id": "id",
            "label": "label",
            "description": "description"
          }
        ],
        "unique": true
      },
      "valueType": "ADDRESS",
      "id": "id",
      "readOnly": true
    }
  },
  "objectType": "objectType",
  "relationshipDefinitions": {
    "foo": {
      "cardinality": "HAS_ONE",
      "description": "description",
      "label": "label",
      "objectType": "objectType",
      "id": "id"
    }
  }
}