Credential
Tampered: one character modified in hash
Verification Flow
1
Parse header — extract agent_id and state_hash from Authorization: D3cipher {id}:{hash}
2
Call verifyGET /v1/verify/{agent_id}?hash={hash}
3
Check responsestatus == "current" is PASS, everything else is BLOCK
Why This Is Not OAuth

OAuth / JWT / API Key

Lifetime Minutes to forever
Rotation Manual or scheduled
On compromise Wait for expiry
On freeze Token still valid
Agent knows? Yes (holds token)

AAAA (D3cipher)

Lifetime Until next action
Rotation Every stamp (automatic)
On compromise Dead on next action
On freeze Instant propagation
Agent knows? No (infrastructure)
Counterparty Integration

The entire integration is five lines. Parse the header, call verify, act on the response.

# Your middleware — this is the complete integration auth = request.headers.get("Authorization", "") agent_id, state_hash = auth.removeprefix("D3cipher ").split(":", 1) resp = httpx.get( f"https://api.d3cipher.ai/v1/verify/{agent_id}", params={"hash": state_hash} ) if resp.json()["status"] != "current": return Response(status=401) # BLOCK