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

# List external addresses

> Retrieve a list of external addresses configured for alert webhook notifications
in your environment. External addresses are blockchain addresses not generated by
Portal that you still want to monitor for transactions.




## OpenAPI

````yaml /openapi/custodian-api.yaml get /custodians/me/alerts/webhooks/external-addresses
openapi: 3.1.0
info:
  title: Portal Custodian API
  version: '3.0'
  description: >
    The Portal Custodian API provides endpoints for managing clients, building
    transactions,

    retrieving wallet data, managing delegations, alert webhooks, and gas
    sponsorship.

    All endpoints require authentication via a Portal API Key (also known as a
    Custodian API Key)

    passed as a Bearer token.


    ## Base URL

    `https://api.portalhq.io/api/v3`


    ## Authentication

    Include your Portal API Key as a Bearer token in the `Authorization` header
    of every request.


    ## Chain ID Format

    Chain parameters use either friendly names (e.g. `ethereum`, `solana`) or
    CAIP-2 format

    (e.g. `eip155:1`, `solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp`). When using
    CAIP-2 format

    in URLs, ensure the colon is URI-encoded (`%3A`).
servers:
  - url: https://api.portalhq.io/api/v3
    description: Production
security:
  - bearerAuth: []
tags:
  - name: Clients
    description: Create and manage Portal clients
  - name: Transactions
    description: Build and evaluate blockchain transactions
  - name: Wallet Metadata
    description: Retrieve wallet balances and NFTs
  - name: Wallet Shares
    description: Manage backup shares and wallet ejection
  - name: Delegations
    description: Manage token delegations and delegated transfers
  - name: Session Keys
    description: Build and send EIP-7702 session key user operations
  - name: Alert Webhooks
    description: Manage alert webhooks, external addresses, and replay failed events
  - name: Gas Sponsorship
    description: View and manage gas sponsorship across chains
paths:
  /custodians/me/alerts/webhooks/external-addresses:
    get:
      tags:
        - Alert Webhooks
      summary: List external addresses
      description: >
        Retrieve a list of external addresses configured for alert webhook
        notifications

        in your environment. External addresses are blockchain addresses not
        generated by

        Portal that you still want to monitor for transactions.
      operationId: listExternalAddresses
      responses:
        '200':
          description: External addresses retrieved successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ExternalAddressListResponse'
              example:
                data:
                  - id: cm4voycw2001f68veade3tr0i
                    address: '0x1234567890abcdef1234567890abcdef12345678'
                    namespace: EIP155
                    createdAt: '2025-01-15T10:30:00.000Z'
                    updatedAt: '2025-01-15T10:30:00.000Z'
                  - id: cm4voycw2001f68veade3tr0j
                    address: ABC123def456...
                    namespace: SOLANA
                    createdAt: '2025-01-16T14:00:00.000Z'
                    updatedAt: '2025-01-16T14:00:00.000Z'
        '400':
          description: Bad request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '401':
          description: Unauthorized - invalid or missing authentication token
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
components:
  schemas:
    ExternalAddressListResponse:
      type: object
      properties:
        data:
          type: array
          items:
            $ref: '#/components/schemas/ExternalAddress'
    ErrorResponse:
      type: object
      properties:
        error:
          type: string
          description: Error message describing what went wrong
    ExternalAddress:
      type: object
      properties:
        id:
          type: string
        address:
          type: string
          description: The blockchain address being monitored.
        namespace:
          type: string
          enum:
            - eip155
            - solana
          description: The blockchain namespace of the address.
        createdAt:
          type: string
          format: date-time
        updatedAt:
          type: string
          format: date-time
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: |
        Portal API Key (Custodian API Key). Pass as a Bearer token in the
        Authorization header.

````