arp.json — capabilities root

Enumerates the well-known documents + version an ARP endpoint serves. Served at `/.well-known/arp/arp.json`.

$id: https://arp.spec/schema/arp-json/v0.1.jsonDOWNLOAD JSON

FIELDS

ARP protocol version (e.g. "0.1")

Capability tokens advertised (e.g. "didcomm-v2", "cedar-pdp", "ucan-tokens")

HTTPS URL of the scope catalog JSON this agent honours

HTTPS URL of the Cedar policy schema

EXAMPLE PAYLOAD

{
  "version": "…",
  "capabilities": [],
  "scope_catalog_url": "…",
  "policy_schema_url": "…"
}

Examples are generated from schema metadata (examples array if present, otherwise a synthesised skeleton from the required fields). Always re-validate against the schema before shipping payloads.