{"uid":"cap_Q7xhYIKLBkMAZ3X4nKZwT","slug":"us-tax-brackets-constants-lookup-a68f8005","name":"US Tax Brackets & Constants Lookup","description":"Reference tables for a US tax year and filing status: income brackets, standard deduction, FICA constants, and capital-gains breakpoints. Pure lookup, not tax advice.","url":"https://api.agentstools.dev/tax/brackets","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","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","required":[],"properties":{"tax_year":{"type":"integer","description":"Tax year, default 2026"},"filing_status":{"enum":["single","married_jointly","married_separately","head_of_household"],"type":"string","description":"Filing status, default single"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_dQvNLLmaML4W7KlHeuH4J","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns US federal tax reference tables for a given tax year and filing status: income brackets, standard deduction, FICA constants, and capital-gains breakpoints.","exampleAgentPrompt":"Can you pull up the federal tax brackets, standard deduction, FICA constants, and capital gains breakpoints for tax year 2026 for a single filer?","exampleUseCases":null,"resultDescription":"A structured reference table containing US federal income tax brackets, the standard deduction amount, FICA (Social Security and Medicare) constants, and capital-gains rate breakpoints — all scoped to the requested tax year and filing status.","failureModes":["Unsupported tax year returns an error or empty data","Invalid filing_status enum value causes a 400 bad request","Network timeout if the service is temporarily unavailable","Missing or malformed query parameters may return defaults (2026, single) rather than the requested values"],"whenToPreferThis":"Use this endpoint when you need authoritative reference table data (brackets, deductions, FICA constants, capital-gains breakpoints) for US federal taxes for a specific year and filing status — especially as upstream input to tax calculation or planning workflows. Prefer this over the calculation endpoints when you need raw bracket data rather than a computed tax estimate.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T01:10:59.579Z","isFirstParty":false}