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

# List Countries

> Use the list_countries MCP tool on the DialNexa remote MCP server.

<span data-api-safety-label="read-only"><Badge color="gray" size="sm" shape="pill">Read only</Badge></span>

Returns the global list of countries phone numbers/calls can be configured for, with their country codes. This is reference data, not org-specific — use list\_org\_phone\_country\_rules for what the organization has actually enabled.

## Parameters

This tool takes no parameters.

## Before you call

* Connect and initialize the MCP client with OAuth or an API key for the intended workspace.
* This tool has no required arguments.

## Example MCP request

Send `tools/call` after your client completes MCP initialization. Replace placeholder values with IDs and inputs from your workspace. For object and array parameters, follow the nested requirements in the parameter description instead of treating an empty value as complete.

```json theme={null}
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "list_countries",
    "arguments": {}
  }
}
```

The server returns one text content block. Parse `content[0].text` as JSON when the tool succeeds. See [MCP responses and errors](/docs/mcp-tools/errors) for the full envelope and failure behavior.

## Verify the result

Confirm the response is not marked `isError`, parse `content[0].text` as JSON, and verify that returned IDs and workspace data match the request.

## Retry safety

This tool does not change workspace data. Retrying after a transient transport failure is safe.

## Related MCP tools

* [List Organization Phone Country Rules](/docs/mcp-tools/phone-numbers/list-org-phone-country-rules): `list_org_phone_country_rules`

## Related guides

* [Connect to the DialNexa MCP server](/docs/mcp-tools/overview)
* [Phone Numbers MCP tools](/docs/mcp-tools/phone-numbers/overview)
* [MCP responses and errors](/docs/mcp-tools/errors)