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Reconnect a token when WhatsApp is still linked but WADial shows connected: false. You do not need QR pairing or a pairing code unless the token was logged out.

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Check the status

Call the token status endpoint: 
GET /api/v1/sessions/{sessionId}
Authorization: Bearer <api_key>
Reconnect when the response shows: 
{
  "paired": true,
  "connected": false
}

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Reconnect the token

Call connect again: 
POST /api/v1/sessions/{sessionId}/connect
Authorization: Bearer <api_key>
Wait until the token shows connected: true before sending messages or starting calls.

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When to pair again

Pair again only when the token is not paired: 
{
  "paired": false,
  "connected": false
}
Use QR pairing or pairing code flow for unpaired tokens.