{"uid":"cap_ySXVlzXEQenoB9ZhnB_6O","slug":"halowerk-materials-lca-carbon-calculator-2c7c8355","name":"Halowerk Materials LCA Carbon Calculator","description":"Multiplies installed quantities by supplied waste-adjusted production factors and adds tonne-kilometre transport factors. It reports a transparent partial embodied-carbon inventory only; it does not supply verified EPD data, include use/end-of-life stages unless represented by inputs, compare functional equivalence or constitute a certified life-cycle assessment.","url":"https://prop.halowerk.com/v1/materials-lca","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"materials":{"type":"array","items":{"type":"object","required":["material_id","installed_mass_kg","waste_fraction","production_factor_kgco2e_per_kg","transport_distance_km","transport_factor_kgco2e_per_tonne_km"],"properties":{"material_id":{"type":"string","maxLength":128,"minLength":1},"waste_fraction":{"type":"number","maximum":0.99,"minimum":0},"installed_mass_kg":{"type":"number","maximum":1000000000000000,"minimum":0},"transport_distance_km":{"type":"number","maximum":10000000,"minimum":0},"production_factor_kgco2e_per_kg":{"type":"number","maximum":1000000,"minimum":-1000000},"transport_factor_kgco2e_per_tonne_km":{"type":"number","maximum":1000000,"minimum":0}},"additionalProperties":false},"maxItems":10000,"minItems":1}}},"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_t-Xpzbr7ABhPfcNHLpmFk","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Calculates partial embodied-carbon (kgCO2e) for a list of construction materials by multiplying waste-adjusted installed quantities by production emission factors and adding tonne-kilometre transport emissions.","exampleAgentPrompt":"Calculate the embodied carbon for my construction materials: 5000 kg of concrete (waste fraction 0.05, production factor 0.159 kgCO2e/kg, transport 50 km at 0.062 kgCO2e/tonne-km) and 800 kg of structural steel (waste fraction 0.02, production factor 1.46 kgCO2e/kg, transport 120 km at 0.062 kgCO2e/tonne-km).","exampleUseCases":[{"title":"Residential build carbon inventory","prompt":"I need the partial embodied carbon for my house build — 8000 kg of ready-mix concrete with 5% waste, production factor 0.159 kgCO2e/kg, transported 40 km at 0.062 kgCO2e/tonne-km; and 600 kg of timber with 10% waste, production factor 0.46 kgCO2e/kg, transported 200 km at 0.062 kgCO2e/tonne-km."},{"title":"Comparing two structural materials","prompt":"Can you compute the embodied carbon for two materials side by side: 2000 kg of cross-laminated timber (waste 0.08, production 0.46 kgCO2e/kg, 300 km at 0.05 kgCO2e/tonne-km) versus 2000 kg of reinforced concrete (waste 0.04, production 0.18 kgCO2e/kg, 30 km at 0.07 kgCO2e/tonne-km)?"},{"title":"Whole-project bill of materials carbon","prompt":"Run the embodied carbon calculation for my commercial fit-out bill of materials: 12000 kg concrete at 0.159 kgCO2e/kg with 4% waste and 60 km transport at 0.062 kgCO2e/tonne-km; 3000 kg steel at 1.46 kgCO2e/kg with 2% waste and 150 km transport at 0.062 kgCO2e/tonne-km; and 500 kg insulation at 3.5 kgCO2e/kg with 15% waste and 80 km transport at 0.04 kgCO2e/tonne-km."}],"resultDescription":"Returns a transparent partial embodied-carbon inventory: for each material, the waste-adjusted procurement mass, production emissions (kgCO2e), transport emissions (kgCO2e), and per-material total; plus a grand total across all materials. Does not include use-phase or end-of-life stages, verified EPD data, or functional-equivalence comparisons.","failureModes":["Missing required fields (material_id, installed_mass_kg, waste_fraction, production_factor_kgco2e_per_kg, transport_distance_km, transport_factor_kgco2e_per_tonne_km) returns a validation error","waste_fraction >= 1.0 is rejected (maximum 0.99)","Empty materials array or more than 10,000 items returns a schema validation error","Negative transport factors or distances are rejected","Payment not attached or insufficient USDC balance returns a 402 Payment Required response"],"whenToPreferThis":"Choose this endpoint when you need a fast, transparent, line-by-line embodied-carbon computation for a list of construction materials where you already have production emission factors and transport details. It is ideal for bill-of-materials carbon summaries in early-stage design, contractor submissions, or green-building reporting workflows. Prefer it over full LCA platforms when you do not need certified EPD data, use-phase emissions, or end-of-life stages, and when you want deterministic, auditable arithmetic rather than a black-box result.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T00:37:58.999Z","isFirstParty":false}