---
title: "Update a note"
method: POST
path: "/v1/notes/{id}"
---

# Update a note

`POST /v1/notes/{id}`

Updates an existing note by ID. Only included fields and relationships are modified.

`$account`, `$opportunity`, and `$contact` relationships can be modified via `add` and/or `remove` operations (combined in one call or separately).

Supports idempotency via the `Idempotency-Key` header.

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

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

## Path parameters

- `id` string, required — Unique identifier of the note to update.

## Headers

- `Lightfield-Version` '2026-03-01', required

## Request body

- object
  - `fields` object — Field values to update — only provided fields are modified; omitted fields are left unchanged. See **[Fields and relationships](/using-the-api/fields-and-relationships/)** for value type details.
    - `$title` string, nullable — Title of the note.
    - `$content` string, nullable — Content of the note as markdown formatted text.
  - `relationships` union — Relationship operations to apply. System relationships use a `$` prefix (e.g. `$account`, `$opportunity`, `$contact`); custom relationships use their bare slug. Each value is an operation object with `add` and/or `remove`. `replace` is not supported since note relationships are HAS_MANY.
    - object
      - `$account` object — Operation to modify associated accounts.
        - `add` union — Entity ID(s) to add to the relationship.
          - string
          - string[]
        - `remove` union — Entity ID(s) to remove from the relationship.
          - string
          - string[]
        - `replace` union — Entity ID(s) to set as the relationship replacement, or null to clear supported relationships.
          - string
          - string[]
      - `$opportunity` object — Operation to modify associated opportunities.
        - `add` union — Entity ID(s) to add to the relationship.
          - string
          - string[]
        - `remove` union — Entity ID(s) to remove from the relationship.
          - string
          - string[]
        - `replace` union — Entity ID(s) to set as the relationship replacement, or null to clear supported relationships.
          - string
          - string[]
      - `$contact` object — Operation to modify associated contacts.
        - `add` union — Entity ID(s) to add to the relationship.
          - string
          - string[]
        - `remove` union — Entity ID(s) to remove from the relationship.
          - string
          - string[]
        - `replace` union — Entity ID(s) to set as the relationship replacement, or null to clear supported relationships.
          - string
          - string[]
    - object

## Response `200`

OK

- NoteUpdateResponse
  - `id` string, required — Unique identifier for the entity.
  - `createdAt` string, required — ISO 8601 timestamp of when the entity was created.
  - `updatedAt` string, nullable, required — ISO 8601 timestamp of when the entity was last updated, or null.
  - `httpLink` string, nullable, required — URL to view the entity in the Lightfield web app, or null.
  - `externalId` string, nullable — External identifier for the entity, or null if unset.
  - `fields` object, required — Map of field names to their typed values. System fields are prefixed with `$` (e.g. `$name`, `$email`); custom attributes use their bare slug.
  - `relationships` object, required — Map of relationship names to their associated entities. System relationships are prefixed with `$` (e.g. `$owner`, `$contact`).

## Other responses

- `400` — 400
- `401` — 401
- `403` — 403
- `404` — 404
- `409` — 409
- `415` — 415
- `422` — 422
- `429` — 429
- `500` — 500
- `501` — 501
- `503` — 503
- `504` — 504

---

[API](https://skmtc.net/lightfld/apis/api-reference.md) · [All operations](https://skmtc.net/lightfld/apis/api-reference/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/lightfld/api-reference/versions/93b6c5de5463/schema)