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

# Operator Backend API

The Operator backend exposes a set of publicly accessible endpoints serving information
essential to the fulfillment of the Utility Daml workflows.

It is used by the Utility UI to source reference information, such as the party
identifier of the operator, as well as the set of available instruments.

It is used by wallets and third-party apps to source off-ledger information to advance token standard
workflows (through the use of [explicit contract disclosure](https://docs.digitalasset.com/build/3.3/sdlc-howtos/applications/develop/explicit-contract-disclosure.html)).

## Base URLs

<Tabs>
  <Tab title="MainNet">
    ```text theme={null}
    https://api.utilities.digitalasset.com
    ```
  </Tab>

  <Tab title="TestNet">
    ```text theme={null}
    https://api.utilities.digitalasset-staging.com
    ```
  </Tab>

  <Tab title="DevNet">
    ```text theme={null}
    https://api.utilities.digitalasset-dev.com
    ```
  </Tab>
</Tabs>