curl https://api.sw4p.io/sdk/v1/status/int_abc123 \
  -H "X-API-Key: sk_..."

{
  "intent_id": "int_abc123",
  "status": "complete",
  "source_chain": "BASE",
  "destination_chain": "SOLANA",
  "source_tx": "0x...",
  "destination_tx": "5a..."
}