> ## Documentation Index
> Fetch the complete documentation index at: https://docs.0.finance/llms.txt
> Use this file to discover all available pages before exploring further.

# Register primary Safe

> Attach a Safe to a user after onboarding

## POST `/api/user/safes/register-primary`

Registers a user’s primary Safe after Privy authentication. Requires a Privy access token in the `Authorization` header.

<RequestExample>
  ```bash cURL theme={null}
  curl -X POST "https://0.finance/api/user/safes/register-primary" \
    -H "Authorization: Bearer <privy_jwt>" \
    -H "Content-Type: application/json" \
    -d '{"safeAddress":"0x..."}'
  ```
</RequestExample>

<ResponseExample>
  ```json Success theme={null}
  {
    "message": "Primary safe registered successfully.",
    "data": {
      "id": "uuid",
      "safeAddress": "0x...",
      "safeType": "primary"
    }
  }
  ```
</ResponseExample>

<Info>
  This endpoint is used during onboarding to link the user’s primary Safe on
  Base.
</Info>