> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://help.sigmacomputing.com/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://help.sigmacomputing.com/_mcp/server.

# What's new in Sigma

> Sigma release notes for Feb 27, 2026: Call API action, new API rate limit for export endpoint, and more.

## AI apps

### Call API action (Beta)

You can create actions that call API endpoints in Sigma workbooks. This allows you to trigger workflows, enrich data, and interact with external systems without leaving Sigma.  See [Create actions that call API endpoints](https://help.sigmacomputing.com/docs/create-actions-that-call-api-endpoints).

To support the **Call API** action, you can define API credentials and API connectors directly in Sigma, using diverse authentication methods, dynamic query and path parameters, request bodies with typed variables, and more. You can optionally create a connector from an existing OpenAPI specification. See [Configure API credentials and connectors in Sigma](https://help.sigmacomputing.com/docs/configure-api-credentials-and-connectors-in-sigma).

For step-by-step examples configuring credentials, connectors, and actions to call APIs, see the following tutorials:

* [Tutorial: Configure API credentials, connectors, and actions for the Sigma REST API](https://help.sigmacomputing.com/docs/tutorial-configure-api-credentials-connectors-and-actions-for-the-sigma-rest-api)
* [Tutorial: Configure API credentials, connectors, and actions for the NYC Open Data API](https://help.sigmacomputing.com/docs/tutorial-configure-api-credentials-connectors-and-actions-for-the-nyc-open-data-api)

## API

### New API rate limit

The [Export data from a workbook](/reference/export-workbook) (`POST /v2/workbooks/{workbookId}/export
/`) endpoint is now rate limited to 400 requests per minute, instead of 100 requests per minute.

## Embeds

### New option for `workbook:modal:toggle` inbound JavaScript event

The `workbook:modal:toggle` inbound JavaScript event now supports opening a "Save As" modal with a `modalType` of `save-as`.

For more details, see [Inbound event reference](https://help.sigmacomputing.com/docs/inbound-event-reference).

### New report:download inbound JavaScript event

A new `report:download` inbound JavaScript event is now available to download a report.

For more details, see [Inbound event reference](https://help.sigmacomputing.com/docs/inbound-event-reference).

## Functions and calculations

### DateFromUnixMs and DateFromUnixUs functions

You can use the DateFromUnixMs and DateFromUnixUs functions to calculate a date based on milliseconds and microsends since the Unix epoch.

For more information, see [DateFromUnixMs](https://help.sigmacomputing.com/docs/datefromunixms) and [DateFromUnixUs](https://help.sigmacomputing.com/docs/datefromunixus).

## Workbook elements

### Choose custom category colors from default theme palette

When you customize the colors used for chart color categories, you can now choose colors from the default color palette that is configured for the workbook's current theme.

See [Create and manage workbook themes](https://help.sigmacomputing.com/docs/create-and-manage-workbook-themes#color).

### Create ad hoc calculations (GA)

The ability to add ad hoc calculated rows in pivot tables is now generally available. This allow you to perform one-off calculations in a pivot table row, without modifying the underlying dataset or restructuring your pivot table.

For more information, see [Create ad hoc calculations](https://help.sigmacomputing.com/docs/create-ad-hoc-calculations)

### Customize color categories for maps

For maps with custom color categories configured, you can now customize which color is assigned to a category.

### Sort filters and controls by a custom order (GA)

The ability to sort list and hierarchy filters and controls by a custom order is now generally available.

See [Sort by a custom order](https://help.sigmacomputing.com/docs/sort-filter-values#sort-by-a-custom-order).

## Workbook features

### Use hierarchy controls when customizing export control values (Beta)

When configuring scheduled export options, you can now use hierarchy controls to filter exported data.

See [Filter by control values](https://help.sigmacomputing.com/docs/configure-additional-options-for-exports#filter-by-control-values) and [Hierarchy (Beta)](https://help.sigmacomputing.com/docs/intro-to-control-elements#hierarchy-beta) controls.