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

# Create Subscriber

> Create a WhatsApp subscriber/contact via the ChatSyncs API without waiting for them to message your bot first — request parameters, GET and POST examples, and the response shapes for success, duplicate, and account-not-found cases. Use when a developer asks how to add a contact programmatically or bulk-import subscribers from their own system.

Creates a subscriber (contact) on a connected WhatsApp number, without requiring them to
message your bot first — useful for importing existing contacts from a CRM or signup form.

<Warning>
  **Nothing is validated.** A `phoneNumber` such as `abc` creates a contact with an *empty* chat ID, which can then never
  be looked up or deleted through the API, and an empty `name` is accepted too. Validate both before calling — the phone
  number must be digits only, country code first, no `+`. Every contact counts toward your subscriber limit.
</Warning>

If the contact already exists the response is `{"status":"0","message":"Something went wrong or subscriber already exist."}`.


## OpenAPI

````yaml POST /whatsapp/subscriber/create
openapi: 3.1.0
info:
  title: ChatSyncs Developer API
  version: 1.0.0
  description: >-
    REST API for sending WhatsApp messages and managing subscribers through
    ChatSyncs.


    **Authentication.** Send your key as the `apiToken` parameter, or as
    `Authorization: Bearer <key>` — both work on every endpoint **except Custom
    Fields List**, which only accepts the `apiToken` parameter (a Bearer header
    alone is answered with *The api token field is required.*). A wrong key
    returns HTTP 401 `{"status":"0","message":"Unauthenticated."}`; no key at
    all redirects to the login page.


    **Methods.** Every endpoint accepts both GET and POST with the same
    parameters, except Upload Media, which is POST-only. Use POST for anything
    that changes data.


    **Errors.** Failures usually come back as HTTP 200 with `"status":"0"` and
    the reason in `message`, so always check `status`. `status` is the string
    `"1"` or `"0"` on most endpoints and a boolean on a few.


    **Lists.** Endpoints that return rows put them in `message` as a list; there
    is no `data` field (Custom Fields List is the exception and uses `data`).
servers:
  - url: https://platform.chatsyncs.com/api/v1
security: []
paths:
  /whatsapp/subscriber/create:
    post:
      tags:
        - Subscriber API
      summary: Create Subscriber
      description: >-
        Nothing is validated. A `phoneNumber` such as `abc` creates a contact
        whose chat ID is empty, and so can never be looked up or deleted through
        the API; an empty `name` is accepted too. Check both before calling.
        Every contact created counts toward your subscriber limit.
      operationId: createSubscriber
      requestBody:
        required: true
        content:
          application/x-www-form-urlencoded:
            schema:
              type: object
              properties:
                apiToken:
                  type: string
                  description: >-
                    Your ChatSyncs API key (not a WhatsApp/Meta access token).
                    [Where to find
                    it](/developer-api/finding-ids#api-token-apitoken).
                  example: API-KEY
                phoneNumberID:
                  type: string
                  description: >-
                    The WhatsApp account's phone number ID to create this
                    subscriber under. (Note: camelCase.) [Where to find
                    it](/developer-api/finding-ids#phone-number-id-phone_number_id).
                  example: PHONE-NUMBER-ID
                name:
                  type: string
                  description: The subscriber's name.
                  example: NAME
                phoneNumber:
                  type: string
                  description: >-
                    The subscriber's number, with country code and no + sign,
                    digits only. (Note: camelCase.)
                  example: MOBILE
              required:
                - apiToken
                - phoneNumberID
                - name
                - phoneNumber
      responses:
        '200':
          description: >-
            Standard ChatSyncs response. `status` is `"1"` on success and `"0"`
            on failure.
          content:
            application/json:
              schema:
                type: object
                properties:
                  status:
                    type: string
                    description: '`"1"` = success, `"0"` = failure.'
                  message:
                    type: string
                    description: Human-readable result message.
              examples:
                success:
                  summary: Success
                  value:
                    status: '1'
                    message: WhatsApp subscriber has been created.
                error:
                  summary: Unknown phoneNumberID
                  value:
                    status: '0'
                    message: WhatsApp account not found.
                duplicate:
                  summary: Contact already exists
                  value:
                    status: '0'
                    message: Something went wrong or subscriber already exist.
        '401':
          description: >-
            `apiToken` is wrong. (With no token at all the API redirects to the
            login page with HTTP 302 instead of returning JSON.)
          content:
            application/json:
              schema:
                type: object
                properties:
                  status:
                    type: string
                  message:
                    type: string
              examples:
                unauthenticated:
                  summary: Wrong apiToken
                  value:
                    status: '0'
                    message: Unauthenticated.

````

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