curl -X GET 'https://api.elevenlabs.io/v1/convai/phone-numbers?provider=twilio&agent_id=agent-id&branch_id=branch-id' \
  -H "xi-api-key: $ELEVENLABS_API_KEY"

# GET /v1/convai/phone-numbers (ElevenLabs API)
Base URL: https://api.elevenlabs.io
Auth: xi-api-key: <ELEVENLABS_API_KEY>
Last verified: 2026-09-03

> List Phone Numbers

## Critical Gotchas
* Authentication uses the non-standard `xi-api-key` header, not `Authorization: Bearer`. Sending a Bearer token returns HTTP 401.
* Text-to-speech responses are raw binary audio, not JSON. Write the body to a file (`--output speech.mp3`) rather than parsing it.

## cURL
curl -X GET 'https://api.elevenlabs.io/v1/convai/phone-numbers?provider=twilio&agent_id=agent-id&branch_id=branch-id' \
  -H "xi-api-key: $ELEVENLABS_API_KEY"

## Parameters
| Name | In | Type | Required | Description |
| :--- | :--- | :--- | :--- | :--- |
| provider | query | string | No | Filter by telephony provider |
| agent_id | query | string | No | Filter by assigned agent ID |
| branch_id | query | string | No | Filter by assigned branch ID |

## Response (200 OK)
[{"label":"Customer Support","phone_number":"+1234567890"}]

---
Need an API key? Get one at https://elevenlabs.io/app/sign-up

GET

/v1/convai/phone-numbers

ElevenLabs API

List Phone Numbers

Base URL: https://api.elevenlabs.io
Auth: xi-api-key: <ELEVENLABS_API_KEY>
Last verified: 2026-09-03 · upstream hash matched

Actions

Agents: curl -H "Accept: text/markdown" this URL
→ 198 tokens · Vary: Accept

Critical gotchas

Authentication uses the non-standard xi-api-key header, not Authorization: Bearer. Sending a Bearer token returns HTTP 401.

Text-to-speech responses are raw binary audio, not JSON. Write the body to a file (--output speech.mp3) rather than parsing it.

cURL

curl -X GET 'https://api.elevenlabs.io/v1/convai/phone-numbers?provider=twilio&agent_id=agent-id&branch_id=branch-id' \  -H "xi-api-key: $ELEVENLABS_API_KEY"

Get a free ElevenLabs API key → sponsored

Parameters

Name	In	Type	Required	Description
provider	query	string	No	Filter by telephony provider
agent_id	query	string	No	Filter by assigned agent ID
branch_id	query	string	No	Filter by assigned branch ID

Response 200 OK

[
  {
    "label": "Customer Support",
    "phone_number": "+1234567890",
    "phone_number_id": "phone_123",
    "provider": "twilio"
  }
]