{"uid":"cap_TCK16adnSFyDKbKwV2_o7","slug":"forgemesh-vehicle-fuel-economy-5e29f5e2","name":"ForgeMesh Vehicle Fuel Economy","description":"Official fuel-economy lookup for US light-duty vehicles back to 1984: city, highway, and combined MPG, fuel type, estimated annual fuel cost, tailpipe CO2 grams per mile, and greenhouse-gas score — by year/make/model, VIN, or exact variant id. Sibling engine/transmission variants are listed so agents can price the exact configuration. For cost-of-ownership, shopping, and fleet agents.","url":"https://x402.forgemesh.io/vehicle-fuel-economy","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"vin":{"type":"string","description":"VIN — decoded automatically (alternative to make/model/model_year)"},"make":{"type":"string","description":"e.g. Honda"},"model":{"type":"string","description":"e.g. Accord"},"model_year":{"type":"string","description":"4-digit year, 1984+"},"vehicle_id":{"type":"integer","description":"exact variant id from other_variants"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_lo_jVEtvvmrjBuPIGgCmu","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Looks up official US EPA fuel-economy data (city/highway/combined MPG, fuel type, annual fuel cost, CO2 emissions, greenhouse-gas score) for any US light-duty vehicle from 1984 onward by VIN, year/make/model, or variant ID.","exampleAgentPrompt":"What's the EPA fuel economy for a 2021 Toyota Camry — give me the city, highway, and combined MPG, the estimated annual fuel cost, and the greenhouse-gas score for all available engine variants.","exampleUseCases":[{"title":"Car shopping cost-of-ownership comparison","prompt":"I'm deciding between a 2023 Honda Accord and a 2023 Toyota Camry — can you pull the city, highway, and combined MPG plus estimated annual fuel cost for both so I can compare which one is cheaper to run?"},{"title":"Fleet vehicle emissions audit","prompt":"I need the tailpipe CO2 grams per mile and greenhouse-gas score for all engine variants of the 2022 Ford F-150 — we're auditing our fleet for emissions reporting."},{"title":"VIN-specific fuel economy decode","prompt":"I just bought a used car with VIN 1HGBH41JXMN109186 — can you decode the fuel economy data for it including the MPG ratings and what fuel type it takes?"}],"resultDescription":"Returns city, highway, and combined MPG ratings, fuel type, EPA-estimated annual fuel cost in USD, tailpipe CO2 grams per mile, greenhouse-gas score (1–10), and a list of sibling engine/transmission variants with their own IDs so the agent can look up the exact configuration.","failureModes":["VIN not found or not a US light-duty vehicle — returns error or empty result","Year/make/model combination does not exist in EPA database (pre-1984 or non-US vehicle)","Ambiguous model returns multiple variants without selecting one — agent must specify vehicle_id to narrow down","Invalid model_year format (non-4-digit or out of range) causes validation error","Partial input (e.g. make only without model or year) may return no results"],"whenToPreferThis":"Use this endpoint when you need official US EPA fuel-economy figures — especially city/highway/combined MPG, annual fuel cost estimates, CO2 per mile, or greenhouse-gas scores — for any US light-duty vehicle from 1984 onward. Prefer this over general vehicle info APIs when the goal is cost-of-ownership analysis, fleet emissions auditing, or car-shopping comparisons. It supports VIN decoding for used-car scenarios and returns sibling variants so agents can pinpoint the exact engine/transmission configuration.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T12:54:07.798Z","isFirstParty":false}