## Create

**post** `/v1/notes`

Creates a new note record.

The note author is automatically set to the API key owner.

Supports idempotency via the `Idempotency-Key` header.

**[Required scope](/using-the-api/scopes/):** `notes:create`

**[Rate limit category](/using-the-api/rate-limits/):** Write

### Body Parameters

- `fields: object { "$title", "$content" }`

  Field values for the new note. `$title` is required; `$content` is optional. See **[Fields and relationships](/using-the-api/fields-and-relationships/)** for value type details.

  - `"$title": string`

    Title of the note.

  - `"$content": optional string`

    Content of the note as markdown formatted text.

- `relationships: optional object { "$account", "$opportunity" }`

  Relationships to set on the new note. System relationships use a `$` prefix (e.g. `$account`, `$opportunity`). Each value is a single entity ID or an array of IDs. The note author is automatically set to the API key owner.

  - `"$account": optional string or array of string`

    ID(s) of accounts to associate with this note.

    - `UnionMember0 = string`

    - `UnionMember1 = array of string`

  - `"$opportunity": optional string or array of string`

    ID(s) of opportunities to associate with this note.

    - `UnionMember0 = string`

    - `UnionMember1 = array of string`

### Returns

- `NoteCreateResponse = object { id, createdAt, fields, 4 more }`

  - `id: string`

    Unique identifier for the entity.

  - `createdAt: string`

    ISO 8601 timestamp of when the entity was created.

  - `fields: map[object { value, valueType } ]`

    Map of field names to their typed values. System fields are prefixed with `$` (e.g. `$name`, `$email`); custom attributes use their bare slug.

    - `value: string or number or boolean or 3 more`

      The field value, or null if unset.

      - `UnionMember0 = string`

      - `UnionMember1 = number`

      - `UnionMember2 = boolean`

      - `UnionMember3 = array of string`

      - `Address = object { city, country, latitude, 5 more }`

        - `city: optional string`

          City name.

        - `country: optional string`

          2-letter ISO 3166-1 alpha-2 country code.

        - `latitude: optional number`

          Latitude coordinate.

        - `longitude: optional number`

          Longitude coordinate.

        - `postalCode: optional string`

          Postal or ZIP code.

        - `state: optional string`

          State or province.

        - `street: optional string`

          Street address line 1.

        - `street2: optional string`

          Street address line 2.

      - `FullName = object { firstName, lastName }`

        - `firstName: optional string`

          The contact's first name.

        - `lastName: optional string`

          The contact's last name.

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

      The data type of the field.

      - `"ADDRESS"`

      - `"CHECKBOX"`

      - `"CURRENCY"`

      - `"DATETIME"`

      - `"EMAIL"`

      - `"FULL_NAME"`

      - `"MARKDOWN"`

      - `"MULTI_SELECT"`

      - `"NUMBER"`

      - `"SINGLE_SELECT"`

      - `"SOCIAL_HANDLE"`

      - `"TELEPHONE"`

      - `"TEXT"`

      - `"URL"`

  - `httpLink: string`

    URL to view the entity in the Lightfield web app, or null.

  - `relationships: map[object { cardinality, objectType, values } ]`

    Map of relationship names to their associated entities. System relationships are prefixed with `$` (e.g. `$owner`, `$contact`).

    - `cardinality: string`

      Whether the relationship is `has_one` or `has_many`.

    - `objectType: string`

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

    - `values: array of string`

      IDs of the related entities.

  - `updatedAt: string`

    ISO 8601 timestamp of when the entity was last updated, or null.

  - `externalId: optional string`

    External identifier for the entity, or null if unset.

### Example

```http
curl https://api.lightfield.app/v1/notes \
    -H 'Content-Type: application/json' \
    -H 'Lightfield-Version: 2026-03-01' \
    -H "Authorization: Bearer $API_KEY" \
    -d '{
          "fields": {
            "$title": "$title"
          }
        }'
```