Mart402

Pay-per-call APIs for AI agents with verifiable results: documents & web, Japan statutory calculations, calibrated vision. Pay per call with x402 (USDC on Base) - no account, no API key.

Skills

• extract
  URL -> main-content Markdown + metadata. JS-heavy sites are auto-rendered. POST /v1/extract. From $0.005 per call.
  x402web
• parse
  PDF -> structured Markdown. One step: POST /v1/parse {url} (the 402 quotes the exact price for that PDF), or two-step: free POST /v1/parse/quote {url} then POST /v1/parse {quote_id}. Text-embedded and scanned PDFs are auto-routed. Unpaid one-step calls share the free quote limit (20/hour/IP). POST /v1/parse. From $0.01 per call.
  x402documents
• ocr
  Single image -> text with hallucination-guarded quality signals: dual-engine consensus (VLM + traditional OCR), calibrated confidence, per-segment corroboration. Japanese-strong. POST /v1/ocr. From $0.05 per call.
  x402documents
• enrich
  Company name/domain/URL -> verified company profile from primary sources: official-site extraction + free authoritative registries (GLEIF LEI, Japan NTA corporate number). Every field carries evidence (source URL + match grade) and calibrated confidence; missing fields are honest nulls, never guesses. Choose this when you have a company NAME or DOMAIN (country_hint: jp for Japan). POST /v1/enrich. From $0.03 per call.
  x402company-data
• verify
  Invoice field verification: tax-rate consistency, line-item totals, JP invoice registration number (T+13 digits) check-digit + corporate-number existence observation against the official Japan NTA registry (with vendor-name cross-check), normalized accounting JSON. POST /v1/verify. From $0.015 per call.
  x402verification
• structured
  Fills YOUR JSON schema from any URL. Hybrid LLM extraction + source-text canonicalization. Output contains only your schema keys; missing values are null. Choose this when you have your OWN schema. POST /v1/structured. From $0.03 per call.
  x402web
• jp-company
  Japanese company site -> standard profile: name, address, representative, founded, capital, business lines, employees, listing status, contact. A JP-tuned preset of /v1/structured. Choose this when you have the URL of a Japanese company's own site; for name/domain lookups use /v1/enrich. POST /v1/jp-company. From $0.03 per call.
  x402company-data
• document-pipeline
  One call: PDF -> parse (hallucination-guarded OCR) -> invoice fields -> arithmetic verification -> optional issuer enrichment. Inputs validated before settlement; every stage outcome recorded honestly in stages{}. POST /v1/document-pipeline. From $0.05 per call.
  x402documents
• pdf-merge
  Merge 2-10 PDFs into one, in order. Deterministic. POST /v1/pdf-merge. From $0.003 per call.
  x402documents
• pdf-pages
  Extract pages by range into a new PDF. Deterministic. POST /v1/pdf-pages. From $0.002 per call.
  x402documents
• pdf-info
  PDF facts before paying for parsing: pages, metadata, per-page text volume, scanned-or-not estimate. POST /v1/pdf-info. From $0.001 per call.
  x402documents
• meal-vision
  Meal photo -> itemized nutrition JSON: dishes, portion estimates, calories, protein/fat/carb with per-item confidence. v1.3: reference-object scale calibration (known-size table: chopsticks 23cm, cutlery, phone, plates; food-as-reference demoted as circular), scene-complexity detection with honest confidence downgrade, disclosed kcal range calibrated on 30 weighed meals (26/30 contained, /vision-calibration), PFC energy-balance ratios vs guideline ranges, and an alcohol-aware deterministic 4/4/9 verification layer - estimates are never presented as measurements. v1.5: every call runs the analysis 3x and reports the median run with per-call kcal spread and item agreement (consensus disclosed). POST /v1/meal-vision. From $0.05 per call.
  x402vision
• portrait-analysis
  1-3 portraits -> personal color analysis in three published layers: MEASURED pixel colorimetry (CIELAB, ITA angle from cheek samples) cross-checked against vision-model attributes, cross-photo lighting consistency checks, and a deterministic rule table for the 4-season verdict (rule_trace shows every rule) with 12-subtone detail, all-4 season scores, and a structured palette where every hex carries a human-readable color name. Inconsistencies downgrade confidence honestly. POST /v1/portrait-analysis. From $0.05 per call.
  x402vision
• style-profile
  Integrated styling verdict in one call: seasonal color (measured colorimetry consensus + cross-photo checks), face-impression zone (published 2-axis geometry rules, on-device landmarks), body frame type (photo and/or questionnaire), and integration rules that compose the three layers (palette subset, taste, silhouette, hair/brow/beard modifiers). Every layer carries a rule trace and its own rules_version. POST /v1/style-profile. From $0.05 per call.
  x402vision
• style-report
  The style-profile analysis rendered as a finished, client-ready PDF report (English or Japanese): cover, verdict table, palette swatches with color names, style-aware outfit formulas with concrete examples, two virtual draping boards with disclosed candidate conflicts, honest confidence. Returned as report_pdf_base64 + full profile JSON. POST /v1/style-report. From $2.99 per call.
  x402vision
• report-pack
  Volume pricing for style-report: one payment of 19.90 returns 10 single-use credit codes (1.99/unit vs 2.99 single). Codes never expire and work for en and ja reports. POST /v1/report-pack. From $19.9 per call.
  x402vision
• jp-payroll-net
  Japan annual gross salary -> net take-home: social insurance (official Kyokai-Kenpo FY2026 grade table, all 47 prefectures), income tax (exact NTA Beppyo-5 4000-yen table + reconstruction surtax), resident tax (with adjustment credit). Deterministic; every response cites primary sources + rules_version; unverified rules are never billed. POST /v1/jp-payroll-net. From $0.02 per call.
  x402jp-statutory
• jp-bonus-net
  Japan bonus net pay: premiums (1000-yen floor, annual 5.73M health cap, per-payment 1.5M pension cap) + withholding tax from the official bonus rate table (rate determined by previous-month salary). POST /v1/jp-bonus-net. From $0.01 per call.
  x402jp-statutory
• jp-social-insurance
  Japan monthly social insurance premiums: official grade table (50 grades, official boundaries - not the midpoint approximation), health/long-term-care/pension/employment, official 50-sen rounding. POST /v1/jp-social-insurance. From $0.01 per call.
  x402jp-statutory
• jp-dependent-threshold
  Japan income walls: tax wall derived from basic+salary deductions (not hardcoded), social-insurance walls time-versioned (wage requirement abolished 2026-10-01), spousal walls, student-dependent walls (1.5M/1.88M). POST /v1/jp-dependent-threshold. From $0.02 per call.
  x402jp-statutory
• jp-consumption-tax
  Japan consumption tax: invoice totals with one rounding per rate, qualified invoice (T+13) validation, simplified taxation by business class, 20-percent special (taxable periods that include a day 2023-10-01..2026-09-30; pass taxable_period_start/end). POST /v1/jp-consumption-tax. From $0.01 per call.
  x402jp-statutory
• jp-business-days
  Japan holidays (1980-2099, equinox + substitute + kokumin-no-kyujitsu), business-day arithmetic, statutory tax deadlines with holiday shift, wareki conversion. POST /v1/jp-business-days. From $0.003 per call.
  x402jp-statutory
• jp-overtime-wage
  Japan overtime premiums (Art.37: 25/35/50 percent + late-night, official kihatsu-150 rounding) and Article-36 special-clause limit check. POST /v1/jp-overtime-wage. From $0.015 per call.
  x402jp-statutory
• jp-retirement-tax
  Japan retirement income tax: deduction by service years (40/70 per year, min 800k), half-taxation with short-term/officer exceptions, exact 1-yen withholding floor, resident tax 6+4 split each floored to 100 yen. POST /v1/jp-retirement-tax. From $0.02 per call.
  x402jp-statutory
• jp-mortgage
  Mortgage: level-payment/level-principal schedules, total interest, prepayment effect (term or payment reduction). Pure deterministic annuity math. POST /v1/jp-mortgage. From $0.005 per call.
  x402jp-statutory
• jp-payslip-audit
  Audit a Japanese payslip: recompute health/care/pension/employment premiums and withholding tax from official tables, diff against actuals with 5-way verdicts. Explains grade revisions (teiji-kettei) and combined care notation instead of flagging them as errors; resident tax honestly not_auditable. POST /v1/jp-payslip-audit. From $0.02 per call.
  x402jp-statutory
• jp-crypto-tax
  Japan crypto-asset realized income under NTA rules: total-average (default for individuals) or moving-average, sell/spend/exchange as disposals, fees deductible, opening balances. Verified to the yen against all official NTA FAQ calculation examples. Optional incremental income-tax estimate. POST /v1/jp-crypto-tax. From $0.05 per call.
  x402jp-statutory
• jp-payroll-suite
  Four Japan payroll calculations in one call: net salary + social insurance detail + income-wall analysis (+bonus withholding when previous-month salary given). Same inputs as jp-payroll-net. POST /v1/jp-payroll-suite. From $0.05 per call.
  x402jp-statutory

How to call

https://mart402.com

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