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

# Get Call Phonebook

> Retrieve the most frequently called phone numbers in your workspace.

## Headers

<ParamField header="x-api-key" type="string" required>
  API key used for authenticating requests to the API.
</ParamField>

<ParamField header="x-workspace-id" type="string" required>
  Workspace identifier for the API.
</ParamField>

## Response Fields

<ResponseField name="data" type="array">
  Array of phone number objects ordered by frequency.

  <ResponseField name="toPhoneNumber" type="string">
    The phone number in E.164 format.
  </ResponseField>
</ResponseField>

<ResponseExample>
  ```json theme={null}
  [
    { "toPhoneNumber": "+14155551234" },
    { "toPhoneNumber": "+14155555678" },
    { "toPhoneNumber": "+14155559012" }
  ]
  ```
</ResponseExample>