> 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/architecture/where-zetrix-fits-the-x401-abstractions.md).

# Where Zetrix fits the x401 abstractions

| x401 abstraction    | Zetrix realization                                                                            |
| ------------------- | --------------------------------------------------------------------------------------------- |
| Issuer identity     | **BID-method DID** on Zetrix; issuer public keys resolvable from the DID document             |
| Credential          | **ZID Verifiable Credential** (national ID, business registration, accreditation, membership) |
| Credential format   | `sd-jwt` (selective disclosure) or `jwt_vc_json`; `mso_mdoc` for mDL interop                  |
| Revocation / status | On-chain status-list contract; verifiers read status offline via cached snapshots             |
| Trust anchoring     | On-chain issuer registry contract; deterministic, tamper-evident, no central CA               |
| Agent binding       | Agent key registered as a scoped, revocable delegate under the Principal's DID                |