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

# Introspect phone number

> Validate a phone number and check if a WhatsApp conversation window is open.



## OpenAPI

````yaml /openapi.json post /v1/introspect/phone
openapi: 3.0.3
info:
  title: Zavu Unified Messaging Layer API
  version: 0.2.0
  description: >
    Unified multi-channel messaging API for Zavu.


    Supported channels:

    - **SMS**: Simple text messages

    - **WhatsApp**: Rich messaging with media, buttons, lists, CTA URL buttons,
    and templates

    - **Telegram**: Bot messaging with text, media, and interactive elements

    - **Email**: Transactional emails via Amazon SES


    Design goals:

    - Simple `send()` entrypoint for developers

    - Project-level authentication via Bearer token

    - Support for all WhatsApp message types (text, image, video, audio,
    document, sticker, location, contact, buttons, list, cta_url, reaction,
    template)

    - If a non-text message type is sent, WhatsApp channel is used automatically

    - 24-hour WhatsApp conversation window enforcement

    - Universal `to` field accepts phone numbers (E.164), email addresses, or
    numeric chat IDs (Telegram/Instagram)
servers:
  - url: https://api.zavu.dev
security:
  - bearerAuth: []
paths:
  /v1/introspect/phone:
    post:
      summary: Introspect phone number
      description: >-
        Validate a phone number and check if a WhatsApp conversation window is
        open.
      operationId: introspectPhone
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/PhoneIntrospectionRequest'
      responses:
        '200':
          description: Phone number introspection result.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PhoneIntrospectionResponse'
        '400':
          description: Invalid phone number.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '401':
          description: Unauthorized.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
      security:
        - bearerAuth: []
components:
  schemas:
    PhoneIntrospectionRequest:
      type: object
      required:
        - phoneNumber
      properties:
        phoneNumber:
          type: string
          example: '+56912345678'
    PhoneIntrospectionResponse:
      type: object
      required:
        - phoneNumber
        - countryCode
        - validNumber
      properties:
        phoneNumber:
          type: string
        countryCode:
          type: string
          example: CL
        validNumber:
          type: boolean
        nationalFormat:
          type: string
          description: Phone number in national format.
          example: (312) 945-7420
        lineType:
          $ref: '#/components/schemas/LineType'
        carrier:
          $ref: '#/components/schemas/Carrier'
        availableChannels:
          type: array
          items:
            type: string
          description: List of available messaging channels for this phone number.
    Error:
      type: object
      required:
        - code
        - message
      properties:
        code:
          type: string
          example: invalid_request
        message:
          type: string
          example: Phone number is invalid
        details:
          type: object
          additionalProperties: true
    LineType:
      type: string
      description: Type of phone line.
      enum:
        - mobile
        - landline
        - voip
        - toll_free
        - unknown
    Carrier:
      type: object
      description: Carrier information for the phone number.
      properties:
        name:
          type: string
          nullable: true
          description: Carrier name.
          example: Verizon Wireless
        type:
          $ref: '#/components/schemas/LineType'
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT

````