{"uid":"cap_fZZDj3x0z4gwMW3XzR-fY","slug":"pet-care-calc-resting-energy-requirement-rer-0ab14cb2","name":"Pet Care Calc – Resting Energy Requirement (RER)","description":"Resting energy requirement (RER) in kcal/day for a dog or cat from body weight, using 70 x kg^0.75 and the linear shortcut.","url":"https://pet-calc.x402tookit.com/resting-energy?utm_source=zero.xyz","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"],"type":"string"},"queryParams":{"type":"object","required":["weight"],"properties":{"unit":{"type":"string","description":"kg (default) or lb"},"weight":{"type":"number","description":"Body weight (ideal or target weight for an overweight pet)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"asOf":{"type":["null","string"]},"source":{"type":["null","string"]},"reasons":{"type":["array","null"],"items":{"type":"string"}},"summary":{"type":["null","string"]},"verdict":{"type":["null","string"]},"degraded":{"type":["boolean","null"]},"weightKg":{"type":["null","number"]},"weightLb":{"type":["null","number"]},"disclaimer":{"type":["null","string"]},"notChecked":{"type":["array","null"],"items":{"type":"string"}},"rerKjPerDay":{"type":["null","number"]},"rerKcalPerDay":{"type":["null","number"]},"linearShortcutValid":{"type":["boolean","null"]},"linearShortcutKcalPerDay":{"type":["null","number"]}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","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":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_xtpK7bB1h6FiTVBmWKCS7","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Calculates the resting energy requirement (RER) in kcal/day for a dog or cat from body weight using the formula 70 × kg^0.75 and the linear shortcut approximation.","exampleAgentPrompt":"What's the resting energy requirement for my 12 kg dog? Can you calculate the RER in kcal per day using both the standard formula and the linear shortcut?","exampleUseCases":[{"title":"Weight loss diet planning for obese cat","prompt":"My cat weighs 7 kg but her ideal target weight is 5 kg — can you calculate the resting energy requirement at her target weight of 5 kg so I can plan her calorie-restricted diet?"},{"title":"Veterinary nutrition baseline for a dog","prompt":"I need the resting energy requirement for a 30 lb dog to set a nutritional baseline — please compute the RER in kcal per day and tell me if the linear shortcut is valid at that weight."},{"title":"Post-surgery recovery calorie check","prompt":"My dog just had surgery and weighs 8 kg — what's his resting energy requirement in kcal per day so we can make sure he's getting enough calories to recover without overfeeding?"}],"resultDescription":"Returns the pet's weight in both kg and lb, the RER calculated via 70 × kg^0.75 in both kcal/day and kJ/day, the linear shortcut RER in kcal/day, a boolean flag indicating whether the linear shortcut is valid for the given weight, a disclaimer, and metadata including source and timestamp.","failureModes":["Missing required 'weight' query parameter returns an error","Non-numeric weight value causes a validation failure","Extremely low or zero weight values may produce nonsensical or invalid results","Invalid unit value (not 'kg' or 'lb') may cause a processing error or default to kg","Payment failure (x402) results in a 402 response before calculation occurs"],"whenToPreferThis":"Choose this endpoint when you need a precise RER calculation using the veterinary standard 70 × kg^0.75 formula, especially when you also want the linear shortcut approximation and a validity flag for that shortcut. Prefer this over general calorie calculators when you need the basal metabolic floor (RER) rather than a life-stage-adjusted daily energy requirement (DER).","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T13:08:25.528Z","isFirstParty":false,"canonicalSlug":"pet-care-calc-resting-energy-requirement-rer-0ab14cb2"}