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

# Subscribe a WABA to webhooks

> Subscribes the WABA to the default Eazybe callback or a custom callback.
The callback must answer Meta's verification handshake with `hub.challenge`.




## OpenAPI

````yaml /api-reference/meta/openapi.yaml post /meta/wabas/{wabaId}/webhook-subscriptions
openapi: 3.1.0
info:
  title: Eazybe Meta API Documentation
  version: 1.0.0
  description: |
    A single authenticated Eazybe REST surface over WhatsApp Business Cloud API.
    The wrapper uses the Meta credentials captured when a WABA is connected to
    Eazybe, so callers never send Meta access tokens directly.
servers:
  - url: https://cerberus.eazybe.com/staging/api/v2
    description: Eazybe staging API v2.
security:
  - bearerAuth: []
tags:
  - name: Phone numbers
    description: Discover connected WABAs and phone-number IDs.
  - name: Messaging
    description: Send WhatsApp messages and update message state.
  - name: Templates
    description: Manage WhatsApp message templates.
  - name: Media
    description: Upload, inspect, and delete WhatsApp media.
  - name: Webhooks
    description: Manage WABA webhook subscriptions.
  - name: Analytics
    description: Read messaging, conversation, pricing, and template analytics.
  - name: Profiles and settings
    description: Manage business profiles and phone-number settings.
  - name: Automation
    description: Configure welcome messages, ice-breakers, and commands.
  - name: QR codes
    description: Manage click-to-chat QR codes.
  - name: Flows
    description: Manage the WhatsApp Flows lifecycle.
  - name: Number administration
    description: Register numbers, manage PINs, and synchronize coexistence data.
  - name: Block list
    description: List, block, and unblock WhatsApp users.
paths:
  /meta/wabas/{wabaId}/webhook-subscriptions:
    parameters:
      - $ref: '#/components/parameters/WabaId'
    post:
      tags:
        - Webhooks
      summary: Subscribe a WABA to webhooks
      description: >
        Subscribes the WABA to the default Eazybe callback or a custom callback.

        The callback must answer Meta's verification handshake with
        `hub.challenge`.
      operationId: createWebhookSubscription
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
                - overrideCallbackUri
                - verifyToken
              properties:
                overrideCallbackUri:
                  type: string
                verifyToken:
                  type: string
              description: |-
                ```json
                {
                  "overrideCallbackUri": "https://your-app.com/webhooks/whatsapp",
                  "verifyToken": "shared-secret"
                }
                ```
            example:
              overrideCallbackUri: https://your-app.com/webhooks/whatsapp
              verifyToken: shared-secret
      responses:
        '200':
          description: >-
            App subscribed to this WABA's events


            **Failure responses**


            | **Status** | **Meaning** | **Action** |

            | --- | --- | --- |

            | `401` | Missing, invalid, or expired bearer token |
            Re-authenticate |

            | `404` | `wabaId` not linked to your organization | Verify the id |

            | `400` | Callback URL failed Meta's verification handshake, or is
            not HTTPS | Return `hub.challenge` on the `GET` handshake |

            | `502` | Graph unreachable or timed out | Retry with backoff |
          content:
            application/json:
              schema:
                type: object
                required:
                  - success
                properties:
                  success:
                    type: boolean
              example:
                success: true
components:
  parameters:
    WabaId:
      name: wabaId
      in: path
      required: true
      description: WhatsApp Business Account ID returned by `GET /meta/phone-numbers`.
      schema:
        type: string
      example: '1029384756'
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: Eazybe token
      description: |
        Eazybe bearer token. The token resolves the caller's organization and
        must be kept on the server.

````