{"uid":"cap_9BQFpmaug_oeciTSvmE1k","slug":"561-group-heart-rate-threshold-3936278c","name":"561 Group Heart-Rate Threshold","description":"Heart-Rate Threshold: the Workwell Foundation resting-heart-rate+15bpm pacing-ceiling heuristic, labeled as an unvalidated clinical rule of thumb. Stateless: nothing submitted or computed is stored.","url":"https://market.561.group/v1/pacing/heart-rate-threshold?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_VaTyFsKgZRaWAt9_dmNBC","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes the Workwell Foundation resting-heart-rate+15bpm pacing ceiling heuristic to determine a safe heart-rate threshold for pacing, labeled as an unvalidated clinical rule of thumb.","exampleAgentPrompt":"My resting heart rate is 68 bpm — what's my safe pacing ceiling using the Workwell Foundation resting-heart-rate-plus-15 heuristic?","exampleUseCases":[{"title":"ME/CFS daily pacing ceiling check","prompt":"My resting heart rate this morning was 72 bpm. Can you calculate my heart rate pacing ceiling using the resting HR plus 15 rule so I know what to stay under during any activity today?"},{"title":"Fitness app safe-zone boundary","prompt":"A user's average resting heart rate is 58 bpm. What does the Workwell Foundation heuristic say their maximum safe heart rate threshold should be for pacing purposes?"},{"title":"Telehealth pre-session pacing briefing","prompt":"Before my patient's session, can you compute their pacing ceiling? Their resting heart rate is 80 bpm — apply the plus-15 bpm heuristic and note that it's an unvalidated rule of thumb."}],"resultDescription":"Returns the computed heart-rate pacing ceiling in bpm (resting heart rate + 15 bpm), accompanied by a label noting this is the Workwell Foundation heuristic and is unvalidated as a clinical rule. No data is stored; the computation is fully stateless.","failureModes":["Missing or non-numeric resting heart rate input returns a validation error","Resting heart rate value outside physiologically plausible range may be rejected or flagged","Payment failure via x402 protocol results in a 402 response with no computation returned","Malformed request body returns a 400-level error"],"whenToPreferThis":"Choose this endpoint when you need a quick, stateless, single-call computation of the Workwell Foundation pacing ceiling heuristic (resting HR + 15 bpm) — especially in ME/CFS, chronic illness, or post-exertional malaise contexts. Prefer it over the full 561-group-pacing-analysis endpoint when you only need the threshold value and not a rolling biometric observation report. Ideal for apps, agents, or telehealth tools that want a cheap ($0.01), fast, no-storage calculation with a clear unvalidated-heuristic disclaimer included in the response.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-14T06:35:30.276Z","isFirstParty":false,"canonicalSlug":"561-group-heart-rate-threshold-3936278c"}