Concepts
Bindings
A binding attaches an ECZ-ID to a native identity the machine already has: a registry entry, an origin, an OpenAPI description, a package or a workload identity. A declaration points; only a proven binding proves.
Declared bindings are live: the Resolver shows each one as declared. Proven bindings (BOUND) are not yet available in production, and no public record carries one today, so every binding you read is a declaration until that changes.
Accountability Chain:IdentityCurrent state
Declare, then prove
ECZ-ID does not invent a new place to put identity. A machine declares its ECZ-ID where its ecosystem already looks: an MCP server in .well-known/ecz-mcp.json and its registry entry, an agent in its A2A card or .well-known/ecz-agent.json, an API in x-ecz-id on its OpenAPI info, an SDK in its package manifest.
A declaration
- is published by the operator
- says “look here”
- proves nothing on its own
- can be copied by anyone
A proven binding
- is established through ECZ-ID Core
- appears in the Resolver’s binding block
- is current-state evidence with a re-check date
- never stays proven by itself
Read the binding state, live
The only public statement of whether a binding is proven is resolver_v2.binding in the live record. NO_PUBLIC_PROOF with reason code NO_PUBLIC_BINDING_PROOF_AVAILABLE is the normal state of a new record, not a deficient one.
| Resolver binding state | Read it as |
|---|---|
BOUND | Proven when last verified. Re-check before reliance. |
NO_PUBLIC_PROOF | No public binding proof. Do not infer control. |
MISMATCH | An observed value does not match the record. Fail closed for high-risk use. |
REVOKED · SUSPENDED · DEGRADED | Lifecycle holds. Fail closed for high-risk use. |
PROOF_UNAVAILABLE · NOT_PUBLISHED · UNKNOWN | Not readable now. Unreadable is not absent and not proven. |
Binding classes by family
Each family’s contract names the classes of native identity it can bind. A class being defined is not a claim that a live integration exists with that provider. The full table is in the bindings reference, and the earlier per-surface guides remain at /bindings/.
Related
This page is explanation, not authority. Current state is only ever the live Resolver record. Live facts on this page were measured read-only on 2026-10-10.