{"uid":"cap_WNnn_CBBRqD8JL8mgZZdc","slug":"jewelry-maker-calc-karat-alloy-calculator-072823f1","name":"Jewelry Maker Calc – Karat & Alloy Calculator","description":"Gold karat to fineness and percent, and the alloy to add to fine gold to reach a target karat, or the karat of a mix.","url":"https://jewelry-calc.x402tookit.com/karat-alloy?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":[],"properties":{"karat":{"type":"number","description":"A karat from 1 to 24 (for the fineness and alloy mix)"},"goldGrams":{"type":"number","description":"Alternative: grams of gold at mixKarat1 to combine with mixGrams2 (see mix fields)"},"mixGrams2":{"type":"number","description":"Grams of the second piece"},"mixKarat1":{"type":"number","description":"Karat of the first piece, for the mix calculation"},"mixKarat2":{"type":"number","description":"Karat of the second piece (0 for pure alloy metal)"},"fineGoldGrams":{"type":"number","description":"Grams of fine (24k) gold you start with, to get the alloy needed for the target karat"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"asOf":{"type":["null","string"]},"karat":{"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"]},"fineness":{"type":["null","number"]},"disclaimer":{"type":["null","string"]},"notChecked":{"type":["array","null"],"items":{"type":"string"}},"goldPercent":{"type":["null","number"]},"alloyPercent":{"type":["null","number"]},"fineGoldGrams":{"type":["null","number"]},"finenessExact":{"type":["null","number"]},"totalAlloyedGrams":{"type":["null","number"]},"alloyMetalToAddGrams":{"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_5wuw104ASHHR7W82uBiH4","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":"Converts a gold karat to fineness and purity percentage, calculates how much alloy to add to fine gold to reach a target karat, or finds the resulting karat when mixing two pieces of gold.","exampleAgentPrompt":"I have 15 grams of fine 24k gold and want to alloy it down to 18 karat — how much alloy metal do I need to add, and what will the fineness and gold percentage be?","exampleUseCases":[{"title":"Alloy fine gold to target karat","prompt":"I'm starting with 20 grams of fine 24k gold and want to cast in 14 karat — how much alloy do I need to add, and what's the fineness of 14k?"},{"title":"Check gold purity of a karat","prompt":"What's the fineness and gold percentage of 9 karat gold? I need to confirm what I'm working with before I buy."},{"title":"Find karat of mixed gold pieces","prompt":"I'm melting together 8 grams of 18 karat gold and 4 grams of pure alloy metal — what karat will the final mixture be?"}],"resultDescription":"Returns the fineness (parts per thousand), gold percentage, alloy percentage for the given karat; or the grams of alloy metal needed and total alloyed grams to reach a target karat from fine gold; or the resulting karat when combining two pieces. Includes a summary field and disclaimer.","failureModes":["Missing required karat or input parameters returns an error or null results","Karat value outside 1–24 range may return validation errors","Conflicting mix parameters (e.g. providing both karat and mix fields simultaneously) may cause unexpected results","Network or payment failure returns HTTP 402 or 5xx"],"whenToPreferThis":"Use this endpoint when you need precise jewelry-industry karat-to-fineness conversions, alloy addition calculations for goldsmithing, or karat blending math for combining two pieces of gold. It is purpose-built for jewelers and metalworkers, covering the three core gold alloy scenarios in one API.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-11-03T12:31:43.025Z","isFirstParty":false,"canonicalSlug":"jewelry-maker-calc-karat-alloy-calculator-072823f1"}