Payroll & tax

US net-paycheck breakdown for any of 51 jurisdictions: 2026 federal brackets, FICA (SS wage base $184,500, additional Medicare), and state income tax. Golden-vector verified.

US net-paycheck breakdown for any of 51 jurisdictions: 2026 federal brackets, FICA (SS wage base $184,500, additional Medicare), and state income tax. Golden-vector verified.

Payment: x402 ($0.05 USDC on eip155:8453). Call unpaid to receive an HTTP 402 with requirements, then retry with the PAYMENT-SIGNATURE header. Method: taxable = salary - standardDeduction; federal = marginal 2026 brackets; state = marginal/flat per 51-jurisdiction table (MFJ doubles single thresholds); FICA = 6.2% SS to wage base + 1.45% Medicare + 0.9% additional over threshold; net/check = netAnnual / payPeriods

post/v1/paycheck

Request

  • Base URL: (relative, and it does not resolve against the document’s source URL)
  • URL: /v1/paycheck
  • Auth: none declared

Request body

salarynumber required
statestring required

2-letter US state/DC code

filingStatus'single' | 'mfj'
payFrequency'weekly' | 'biweekly' | 'semimonthly' | 'monthly'

Response

Verified result + provenance (formula, sources, reproducible SHA-256 hash).

Changes

No recorded changes to this operation across all 1 revision of this API.