{"uid":"cap_vgUvBjg6wdUsyI3EE-exD","slug":"cyre-guardian-circuit-breaker-seal-fddffebe","name":"CYRE Guardian Circuit Breaker Seal","description":"Guardian Circuit Breaker — seal operator heartbeat interval + spend rails for an autonomous agent. Heartbeat via /api/circuit/heartbeat; enforce before pay via /api/circuit/check. Patterns, not verdicts. Agent guide: https://cyre.dev/SKILL.md","url":"https://cyre.dev/api/circuit/seal","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","required":["actor"],"properties":{"actor":{"type":"string"},"maxSpendAtomic":{"type":"string"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_6Txvo8OUROdyGh5WJlC01","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"4zMMC9srt5Ri5X14GAgXhaHii3GnPAEERYPJgZJDncDU","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Seals a signed circuit-breaker token that binds an agent's heartbeat interval and spend rails, enabling downstream heartbeat and pre-payment enforcement checks.","exampleAgentPrompt":"Set up a CYRE Guardian circuit breaker seal for my agent at actor address 0xABC123, with a max spend limit of 5000000 atomic units, so its heartbeat and payment rails are locked in before it starts operating.","exampleUseCases":[{"title":"Cap autonomous agent spending before launch","prompt":"Before my trading agent goes live, seal a circuit breaker for actor address 0xDEF456 with a max spend of 2000000 atomic units so it can't overspend — I want the heartbeat and spend rails locked in from the start."},{"title":"Enforce budget ceiling on fleet agent","prompt":"I'm deploying a new agent in my fleet with address 0x789XYZ and I need to cap its total spend at 10000000 atomic units — can you seal a Guardian circuit breaker for it so the spend policy is enforced before any payment goes through?"},{"title":"Initialize spend rails for DeFi automation agent","prompt":"Set up a Guardian circuit seal for my DeFi automation agent at 0xGHI321 with a max atomic spend of 500000, so its heartbeat interval and payment limits are signed and ready before it starts executing any transactions."}],"resultDescription":"Returns a signed circuit-breaker token that encodes the actor's heartbeat interval and spend policy seal. This token must be used in subsequent /api/circuit/heartbeat calls to prove the agent loop is alive, and presented to /api/circuit/check before any payment to enforce the sealed spend rails.","failureModes":["Missing or invalid 'actor' query parameter returns an error and no token is issued","Invalid HTTP method (only GET/HEAD/DELETE accepted) results in a 405 or schema validation error","Malformed maxSpendAtomic value (non-numeric string) may cause policy sealing to fail","Calling seal again for the same actor may overwrite or conflict with an existing circuit token","Network or payment failure ($0.003 USDC x402 charge not settled) results in no token being issued"],"whenToPreferThis":"Use this endpoint at agent initialization time, before the agent begins its operational loop or makes any payments. It is the required first step in the CYRE Guardian circuit-breaker flow — without a sealed token, the heartbeat and pre-payment check endpoints cannot enforce spend limits. Prefer this over ad-hoc spend limit approaches when you need a cryptographically signed, tamper-evident policy that downstream checks (heartbeat, pay-check) can verify trustlessly.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T00:30:38.732Z","isFirstParty":false}