{"uid":"cap_61RnUcUu3xbka3VVMnx6w","slug":"garden-calculators-frost-risk-2040665c","name":"Garden Calculators – Frost Risk","description":"Frost or freeze class of a forecast low against plant hardiness, plus where a date sits against your average frost dates.","url":"https://garden-calc.x402tookit.com/frost-risk?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":["lowTemp"],"properties":{"date":{"type":"string","description":"The date as YYYY-MM-DD, for the calendar position"},"unit":{"type":"string","description":"f (default) or c"},"lowTemp":{"type":"number","description":"Forecast overnight low"},"hardiness":{"type":"string","description":"tender (default), half-hardy or hardy: how well the plant takes cold"},"averageLastFrost":{"type":"string","description":"Your average last spring frost date, YYYY-MM-DD (any year; month and day matter)"},"averageFirstFrost":{"type":"string","description":"Your average first fall frost date, YYYY-MM-DD"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"asOf":{"type":["null","string"]},"lowC":{"type":["null","number"]},"lowF":{"type":["null","number"]},"source":{"type":["null","string"]},"reasons":{"type":["array","null"],"items":{"type":"string"}},"summary":{"type":["null","string"]},"verdict":{"type":["null","string"]},"degraded":{"type":["boolean","null"]},"hardiness":{"type":["null","string"]},"disclaimer":{"type":["null","string"]},"freezeBand":{"type":["null","string"]},"notChecked":{"type":["array","null"],"items":{"type":"string"}},"freezeClass":{"type":["null","string"]},"belowThreshold":{"type":["boolean","null"]},"springPosition":{"type":["null","string"]},"protectionAdvice":{"type":["null","string"]},"typicalDamageThresholdF":{"type":["null","number"]},"averageLastFrostThisYear":{"type":["null","string"]},"dateIsDaysBeforeAverageLastFrost":{"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_xdNudAuZIIt0KCnWHk_Hp","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":"Returns the freeze class of a forecast overnight low against plant hardiness, and indicates where a given date falls relative to average frost dates.","exampleAgentPrompt":"Tonight's forecast low is 29°F — will that hurt my tender tomato seedlings, and is today (May 5) before or after my average last frost date of May 10?","exampleUseCases":[{"title":"Protecting tender seedlings before a cold snap","prompt":"The forecast overnight low is 28°F tonight and I have tender basil seedlings outside. My average last spring frost is April 20 and today is April 15 — tell me the freeze class and whether I need to cover them."},{"title":"Checking fall frost risk for half-hardy plants","prompt":"It's September 8 and tonight's low is supposed to be 33°F. My half-hardy dahlias are still in the ground and my average first fall frost is September 25 — what's the freeze risk and should I dig them up?"},{"title":"Calendar position check for spring planting","prompt":"Is April 30 before or after my average last frost date of May 5? Tonight's low is 38°F and I want to know if it's safe to transplant my half-hardy pepper starts."}],"resultDescription":"Returns a freeze class (e.g. light freeze, hard freeze), the freeze band temperature range, whether the low is below the plant's damage threshold, the typical damage threshold in °F, protection advice, a plain-language verdict and summary, reasons explaining the assessment, and — when frost dates and a date are supplied — the spring calendar position and how many days the date is before or after the average last frost.","failureModes":["Missing required lowTemp parameter returns a validation error","Invalid date format (not YYYY-MM-DD) causes a parsing error","Unknown hardiness value outside allowed enum may be ignored or cause an error","Very extreme temperatures (e.g. >120°F or <-60°F) may return degraded:true","If frost dates are omitted, spring/fall calendar position fields return null"],"whenToPreferThis":"Use this endpoint when you need to classify a specific forecast overnight low against a plant's cold tolerance and/or determine where a given calendar date sits relative to a gardener's local average frost dates. It is purpose-built for home gardeners and gardening agents needing actionable freeze-risk verdicts, damage thresholds, and calendar-aware planting guidance — rather than a generic weather or almanac lookup.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T13:14:24.821Z","isFirstParty":false,"canonicalSlug":"garden-calculators-frost-risk-2040665c"}