{"uid":"cap_j7QPu4QyVOGCtSMZRTKhS","slug":"klima-halowerk-fuel-co2-emissions-calculator-73705ae3","name":"Klima Halowerk Fuel CO2 Emissions Calculator","description":"Calculates TTW and WTW fuel emissions from separately published factors. Missing facts are returned as null and named in unavailable_fields where applicable. Derived values disclose their method; source-backed values disclose source, time window and age. This is neither legal advice nor customs advice.","url":"https://klima.halowerk.com/v1/fuel-co2?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType"],"properties":{"type":{"const":"http"},"method":{"const":"POST"},"bodyType":{"const":"json"},"schemaUrl":{"type":"string","format":"uri"},"exampleUrl":{"type":"string","format":"uri"}},"additionalProperties":true},"output":{"type":"object","required":["type"],"properties":{"type":{"const":"json"},"schemaUrl":{"type":"string","format":"uri"},"exampleUrl":{"type":"string","format":"uri"}},"additionalProperties":true}},"additionalProperties":true},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.004","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":"$0.004/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.004","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.004","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_tK8BzyV8kUNFtAWZmgXr8","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.004","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Calculates tank-to-wheel (TTW) and well-to-wheel (WTW) fuel combustion CO2 emissions from user-supplied quantity, unit, and published emission factors.","exampleAgentPrompt":"Calculate the TTW and WTW CO2 emissions for burning 5000 litres of diesel — the TTW factor is 2.68 kg CO2e/litre and WTW factor is 3.17 kg CO2e/litre, sourced from the DEFRA 2023 emission factors report published on 2023-06-01.","exampleUseCases":[{"title":"Fleet transport emissions reporting","prompt":"I need to calculate the TTW and WTW CO2 emissions for 120,000 litres of diesel consumed by our truck fleet this quarter — use a TTW factor of 2.68 and WTW factor of 3.17 kg CO2e per litre, based on the DEFRA 2023 factors document published 2023-06-01."},{"title":"Aviation fuel carbon footprint","prompt":"Work out the well-to-wheel and tank-to-wheel CO2 emissions for 80,000 kg of jet fuel we used on charter flights — the TTW factor is 2.54 and WTW factor is 3.16 kg CO2e/kg, from the ICAO 2022 Carbon Offset document published 2022-09-15."},{"title":"Sustainability report fuel line item","prompt":"For our annual sustainability report, calculate TTW and WTW emissions for 200,000 cubic metres of natural gas — TTW factor 1.93 and WTW factor 2.21 kg CO2e per cubic metre, sourced from the IEA 2023 Energy Statistics report published 2023-01-01."}],"resultDescription":"Returns calculated TTW and WTW emission totals (in CO2e units consistent with the supplied factors), the computation method used, source attribution including publication URL, title, and date, and a list of any unavailable_fields that could not be computed due to missing inputs.","failureModes":["Missing required fields (unit, quantity, or factors) returns null for affected values with those fields listed in unavailable_fields","Invalid URI format for source URL returns validation error","Quantity or factor values outside allowed range (0 to 1e12) return schema validation error","Malformed published_at date-time format causes request rejection","Both ttw_factor and wtw_factor omitted results in null emission outputs with both listed as unavailable"],"whenToPreferThis":"Choose this endpoint when you have a known fuel quantity and unit plus separately obtained published TTW and/or WTW emission factors and need a transparent, source-disclosed calculation. It is ideal for carbon accounting workflows where audit trails and method disclosure are required. Prefer it over generic calculators when you need the source citation and factor provenance preserved in the output, or when you are building multi-step pipelines that first look up factors (via sibling endpoints) and then apply them.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-28T06:37:30.767Z","isFirstParty":false,"canonicalSlug":"klima-halowerk-fuel-co2-emissions-calculator-73705ae3"}