> For the complete documentation index, see [llms.txt](https://docs.zetrix.com/en/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.zetrix.com/en/developer-resources/agentic-wallet/protocol-flow/result-delivery.md).

# Result delivery

| Mode                    | Trigger                                            | Who verifies the result                                  |
| ----------------------- | -------------------------------------------------- | -------------------------------------------------------- |
| Sync-HMAC (agentic)     | Verification request created with no `callbackUrl` | The RS, after the wallet relays the signed result + HMAC |
| Async callback (legacy) | `callbackUrl` provided                             | The callback receiver                                    |

The wallet never holds the `callbackSecret`; it only relays the signed artifact. Integrity rests entirely on the HMAC, and the RS must reject a missing/invalid signature or a stale timestamp.