CPG-68000 · Seven Canonical Signals · CPG application profile of ACM-68000

CPG-404 — NOT_FOUNDcpg-404.ai

STATE: RESOLVED · LIVE

CPG-404 · NOT_FOUND — Abort transaction.

Operated by GreenCore Solutions Corp. · Microsoft AI Cloud Partner · Open protocol · MIT

cpg-404 resolves to acm-404 — same number, same meaning; CPG application profile of ACM-68000 (cpg-68000.ai).

The Seven Signals — CPG-68000

Signal	State	Resolves to
CPG-000	NOT_APPLICABLE	ACM-000
CPG-200	ALLOW	ACM-200
CPG-300	CONDITIONAL	ACM-300
CPG-403	RESTRICT	ACM-403
CPG-404	NOT_FOUND	ACM-404
CPG-451	ESCALATE	ACM-451
CPG-500	SYSTEM_ERROR	ACM-500

Connection Test

# Connection test — resolves this signal on the door # No API key. No account. No setup. Same number, same meaning, in one round trip. $ curl "https://cpg-404.ai/signals.json" { "signal": "CPG-404", "state": "NOT_FOUND", "resolves_to": "ACM-404", "gtin": "990832300747", "profile": "CPG-68000", "protocol": "ACM-68000" }

Definition

CPG-404 · NOT_FOUND — GS1 GTIN 990832300747. Abort transaction. Resolves to ACM-404 (same number, same meaning).

Machine Surfaces

/protocol.json · /signals.json · /health.json · /llms.txt · /index.md · /auth.md
/.well-known/agent-card.json · /.well-known/mcp/server-card.json · /.well-known/ai-catalog.json · /.well-known/agent-skills/index.json · /.well-known/api-catalog

Identity Beacons

19 GSC headers (the Nineteen, gen-2 set) on every response, including x-gsc-x402: ready. Per-request x-gsc-timestamp and x-gsc-nonce regenerate as proof-of-liveness. x-gsc-signal carries ACM-404 · NOT_FOUND.