---
title: "Bulk Update Custom Field Values"
description: "Set custom field values across media in a single batch operation."
---

> Documentation Index
> Fetch the complete documentation index at: https://docs.speakai.co/llms.txt
> Use this file to discover all available pages before exploring further.

# Bulk Update Custom Field Values

Use the Speak AI MCP server tool `update_multiple_fields` to set custom field values
across media in a single batch operation.

## What does it do?

Set custom field values across media in a single batch operation. Scope the update
with `folderId` (all media in a folder) and/or `mediaIds`.

## Parameters

`update_multiple_fields` takes 3 parameters, 1 of them required.

| Name | Type | Required | Description |
| --- | --- | --- | --- |
| `folderId` | string | No | Apply the field values to all media in this folder |
| `mediaIds` | array of string | No | Apply the field values to these specific media files |
| `fields` | array | Yes | Array of field id/value pairs to set |

## Behaviour

The Speak AI MCP server publishes these behaviour hints for
`update_multiple_fields`.

- Can change data in your workspace.
- Can delete or overwrite data. Use with care.
- Repeating an identical call is safe.
- Stays inside Speak AI. Does not reach other systems.

## Related

- [Custom fields](/mcp/tools/custom-fields/) lists the rest of the Custom fields
  category.
- [Tool reference](/mcp/tools/) lists every Speak AI MCP server tool.
- [MCP server](/mcp/) covers setup, supported clients, and what agents can do once
  connected.

Source: https://docs.speakai.co/mcp/tools/custom-fields/update_multiple_fields/index.mdx