> For the complete documentation index, see [llms.txt](https://docs.nected.ai/nected-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.nected.ai/nected-docs/management-api/dynamic-lookup-table-api.md).

# Dynamic Lookup Table API

The Dynamic Lookup Table API lets you list, create, read and update **attribute library groups** (lookup tables) in your workspace. Each group holds one or more **attributes**, and each attribute has a name, a data type, a list of predefined values and a usage (`Mandatory` or `Optional`).

Use it to update lookup values in bulk, sync them from your systems of record, or promote them between environments in CI/CD. For a no-code walkthrough, see [Dynamic Lookup Tables (Attribute Library)](/nected-docs/references/attribute-library/dynamic-lookup-table.md).

**Entity type:** all paths use the entity type `module`.

**Supported operations:** list, create, get and update only. Publish, test, schedule and version listing are **not** available for attribute libraries.

**Update rules:** after an attribute is created, you can change its **predefined values** and **usage**. You can't change its **name** or **data type**, the same as in the UI.

**Data types:** `String`, `Numeric`, `Date`, `DateTime`, `Boolean`, `List`, `JSON`.

### Why Use the API?

Use the API when you need:

* **Bulk updates** (large value lists in one or a few calls)
* **Automated sync** from your systems of record
* **CI/CD / environment promotion** of lookup values
* **Programmatic governance** with controlled access and auditability