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

# Get Supported Providers

> Get list of supported SIP providers with their default outbound addresses.

Use this endpoint to populate a dropdown in the frontend for provider selection.
Each provider includes:
- id: Provider identifier (e.g., 'twilio', 'vonage-eu')
- name: Display name
- default_sip_address: Default SIP server address for outbound calls
- regions: Available regional variants
- notes: Additional information

Users can always override the SIP address by providing a custom `outbound_address`
when registering a phone number.



## OpenAPI

````yaml https://api.mrassistant.ai/openapi.json get /agents/supported-providers
openapi: 3.1.0
info:
  title: Backend - Multilingual Voice Agent System
  description: FastAPI backend for multilingual voice agents with tool use
  version: 1.0.0
servers: []
security: []
paths:
  /agents/supported-providers:
    get:
      tags:
        - agent-phone-numbers
      summary: Get Supported Providers
      description: >-
        Get list of supported SIP providers with their default outbound
        addresses.


        Use this endpoint to populate a dropdown in the frontend for provider
        selection.

        Each provider includes:

        - id: Provider identifier (e.g., 'twilio', 'vonage-eu')

        - name: Display name

        - default_sip_address: Default SIP server address for outbound calls

        - regions: Available regional variants

        - notes: Additional information


        Users can always override the SIP address by providing a custom
        `outbound_address`

        when registering a phone number.
      operationId: get_supported_providers_agents_supported_providers_get
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema:
                items:
                  additionalProperties: true
                  type: object
                type: array
                title: >-
                  Response Get Supported Providers Agents Supported Providers
                  Get
      security:
        - HTTPBearer: []
components:
  securitySchemes:
    HTTPBearer:
      type: http
      scheme: bearer

````