Sign & Submit API Synchronous endpoints for signing and submitting transactions directly — no job polling required. Endpoints | Endpoint | Purpose | Returns | |----------|---------|---------| | | Sign messages, typed data, or transactions | Signature | | | Submit raw transactions to chain | Transaction hash | POST /agent/sign Signature Types | Type | Use Case | |------|----------| | | Plain text messages (auth, verification) | | | EIP-712 typed data (permits, orders) | | | Sign transactions for later broadcast | Usage Error Responses | Status | Error | Cause | |--------|-------|-------| | 400…