---
title: "Start contacts sync"
method: POST
path: "/v1/senders/{senderId}/whatsapp-sync/contacts"
tags: ["WhatsApp Sync"]
---

# Start contacts sync

`POST /v1/senders/{senderId}/whatsapp-sync/contacts`

Initiate contact names sync from the WhatsApp Business App. This imports contact names stored in the app to Zavu. Only available for coexistence accounts with active status.

## Path parameters

- `senderId` string, required

## Response `202`

Contacts sync initiated.

- WhatsAppSyncStartResponse
  - `message` string, required — Success message.
  - `sync` WhatsAppSyncStatus, required — WhatsApp coexistence sync status.
    - `isCoexistence` boolean, required — Whether the account is in coexistence mode.
    - `status` 'pending_verification' | 'pending_registration' | 'active' | 'disconnected' | 'error', required — WhatsApp account status.
    - `history` WhatsAppSyncHistory, required — History sync status details.
      - `status` 'not_requested' | 'pending' | 'syncing' | 'completed' | 'rejected', required — Status of WhatsApp message history sync.
      - `canSync` boolean, required — Whether history sync can be initiated.
      - `requestedAt` string, date-time, nullable — When the sync was last requested.
      - `completedAt` string, date-time, nullable — When the sync was completed.
    - `contacts` WhatsAppSyncContacts, required — Contacts sync status details.
      - `status` 'not_requested' | 'pending' | 'syncing' | 'completed', required — Status of WhatsApp contacts sync.
      - `canSync` boolean, required — Whether contacts sync can be initiated.
      - `requestedAt` string, date-time, nullable — When the sync was last requested.

## Other responses

- `400` — Invalid request.
- `401` — Unauthorized.
- `404` — Sender not found.

---

[API](https://skmtc.net/zavudev/apis/zavu-unified-messaging-layer-api.md) · [All operations](https://skmtc.net/zavudev/apis/zavu-unified-messaging-layer-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/zavudev/zavu-unified-messaging-layer-api/revisions/4dacdff2adf8/schema)