← All endpoints
cyre.dev circuit heartbeat
https://cyre.dev/api/circuit/heartbeat
answers 402
Guardian Circuit Breaker heartbeat — prove the agent loop is alive; returns rotated circuit token with fresh lastBeatAt. Patterns, not verdicts. Agent guide: https://cyre.dev/SKILL.md
We sent a real
GET request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- 1000 atomic
- Network
- not established
- Pay to
- 9iubApKktcxphCVgBg9CPRPhSH8nkzVRSapxhYwxfCVS
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- GET
- Response latency
- 284 ms
- Payment options
- 2 usable of 2
- Last checked
- 2026-09-06T01:12:24.775Z (37d ago)
- Category
- finance-crypto
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fcyre.dev%2Fapi%2Fcircuit%2Fheartbeat"