Validates a Brazilian CPF (Cadastro de Pessoas Físicas) — the 11-digit individual taxpayer identification number issued by the Receita Federal. Applies the official two-pass modulo-11 checksum algorithm. Returns { valid: boolean, cpf: string } for valid CPFs, or { valid: false, reason: string } for invalid format or failed checksum. Rejects known invalid sequences (all same digits). Use when processing Brazilian e-commerce orders, fintech onboarding, KYC flows, or any compliance workflow requiring a verified Brazilian individual tax ID. Offline validation only — does not query Receita Federal.

Validates a Brazilian CNPJ (Cadastro Nacional da Pessoa Jurídica) — the 14-digit company registration number issued by the Receita Federal. Applies the official two-pass weighted checksum algorithm. Returns { valid: boolean, cnpj: string } for valid CNPJs, or { valid: false, reason: string } for invalid format or failed checksum. Use when processing Brazilian B2B invoices (Notas Fiscais), supplier onboarding, or any compliance workflow requiring a verified Brazilian company tax ID. Offline validation only.

Validates a Brazilian PIX key — the instant payment identifier used by Brazil's central bank payment system (Banco Central do Brasil). Supports all 4 PIX key types: CPF (11 digits), CNPJ (14 digits), email address, phone number (+55 format), and EVP (random UUID key). Returns { valid: boolean, type: 'cpf'|'cnpj'|'email'|'phone'|'evp', key: string } or { valid: false, reason: string }. Use when processing PIX transfers, validating payment recipients, or building Brazilian payment flows in AI agents.

Returns all Brazilian national public holidays for a given year as a structured list. Each holiday includes { date: 'YYYY-MM-DD', name: string, name_en: string }. Moveable holidays (Carnival, Good Friday, Corpus Christi) are dynamically calculated using the Easter algorithm. Returns 12 national holidays defined by Brazilian federal law. Use when calculating business deadlines, invoice payment dates, SLA periods, or scheduling tasks that must avoid non-working days in Brazil.

Validates a Mexican RFC (Registro Federal de Contribuyentes) — the tax identification number issued by the SAT (Servicio de Administración Tributaria). Validates format for both individuals (13 characters: 4 letters + 6 digit date + 3 alphanumeric homoclave) and companies (12 characters: 3 letters + 6 digit date + 3 alphanumeric homoclave). Returns { valid: boolean, type: 'individual'|'company', rfc: string } or { valid: false, reason: string }. Use when processing Mexican CFDI invoices, supplier registration, or any Mexican tax compliance workflow.

Returns all Mexican national public holidays for a given year as a structured list. Each holiday includes { date: 'YYYY-MM-DD', name: string, name_en: string }. Moveable holidays (Constitution Day, President's Day, Revolution Day) follow the Mexican Monday rule (primer lunes de febrero/tercer lunes de noviembre). Returns 9 mandatory national holidays defined by Mexican law. Use when calculating Mexican business deadlines, CFDI payment dates, or scheduling tasks that must avoid non-working days in Mexico.

Validates a Chilean RUT (Rol Único Tributario) — the tax identification number used by individuals and companies in Chile, issued by the SII (Servicio de Impuestos Internos). Applies the official modulo-11 checksum algorithm with check digit 'K' support. Returns { valid: boolean, rut: string, check_digit: string } or { valid: false, reason: string }. Use when processing Chilean DTE electronic invoices, supplier registration, or any Chilean tax compliance workflow. Accepts formats with or without dots and dash.

Returns all Chilean national public holidays for a given year as a structured list. Each holiday includes { date: 'YYYY-MM-DD', name: string, name_en: string }. Easter-dependent holidays (Good Friday, Holy Saturday) are dynamically calculated. Returns 16 mandatory national holidays defined by Chilean law. Use when calculating Chilean business deadlines, DTE invoice dates, or scheduling tasks that must avoid non-working days in Chile.

Validates an Argentine CUIT (Código Único de Identificación Tributaria) — the tax identification number for companies, self-employed workers, and legal entities in Argentina, issued by AFIP (Administración Federal de Ingresos Públicos). Applies the official weighted modulo-11 checksum algorithm. Returns { valid: boolean, cuit: string, type: string } or { valid: false, reason: string }. CUIT prefix identifies entity type: 20/23/24/27 for individuals, 30/33/34 for companies. Use when processing Argentine invoices, supplier registration, or AFIP compliance workflows.

Validates an Argentine CUIL (Código Único de Identificación Laboral) — the labor identification number for individuals in Argentina, used for employment records and social security (ANSES). Uses the same weighted modulo-11 checksum as CUIT. Returns { valid: boolean, cuil: string } or { valid: false, reason: string }. Use when processing Argentine payroll, employment contracts, or any social security compliance workflow.

Returns all Argentine national public holidays for a given year as a structured list. Each holiday includes { date: 'YYYY-MM-DD', name: string, name_en: string }. Moveable holidays (Carnival, Good Friday) are dynamically calculated. Returns 15 national holidays defined by Argentine law. Use when calculating Argentine business deadlines, invoice payment dates, or scheduling tasks that must avoid non-working days in Argentina.

Validates a Colombian NIT (Número de Identificación Tributaria) — the tax identification number for companies and legal entities in Colombia, issued by the DIAN (Dirección de Impuestos y Aduanas Nacionales). Applies the official weighted modulo-11 checksum algorithm with the DIAN verification digit. Returns { valid: boolean, nit: string, verification_digit: string } or { valid: false, reason: string }. Use when processing Colombian electronic invoices (factura electrónica), supplier registration, or DIAN compliance workflows.

Validates the format of a Colombian Cédula de Ciudadanía (CC) — the national identity document for Colombian citizens. Verifies that the number is between 6 and 10 digits as required by the Registraduría Nacional. Returns { valid: boolean, cc: string } or { valid: false, reason: string }. Use when processing Colombian individual tax filings, employment contracts, or KYC onboarding flows requiring a verified Colombian citizen ID. Note: checksum validation is not publicly available for CC numbers.

Validates a Mexican CLABE (Clave Bancaria Estandarizada) — the 18-digit standardized bank account number used for electronic transfers in Mexico, as defined by BANXICO (Banco de México). Applies the official weighted modulo-10 checksum algorithm (weights: 3,7,1 repeating). Returns { valid: boolean, clabe: string, bank_code: string, city_code: string } or { valid: false, reason: string }. Use when processing Mexican wire transfers, validating supplier bank accounts, or building Mexican payment flows in AI agents.

Validates an Argentine CBU (Clave Bancaria Uniforme) — the 22-digit standardized bank account identifier used for electronic transfers in Argentina, as defined by BCRA (Banco Central de la República Argentina). Applies the official weighted modulo-10 checksum algorithm validated in two blocks: the 8-digit bank/branch block and the 14-digit account block. Returns { valid: boolean, cbu: string, bank_code: string } or { valid: false, reason: string }. Use when processing Argentine wire transfers, validating supplier bank accounts, or building Argentine payment flows.

Returns all Colombian national public holidays for a given year as a structured list. Each holiday includes { date: 'YYYY-MM-DD', name: string, name_en: string }. Colombia uses the 'Ley de Puentes' (Law 51/1983) which moves most holidays to the following Monday. Easter-dependent holidays are dynamically calculated. Returns 18 national holidays defined by Colombian law. Use when calculating Colombian business deadlines, factura electrónica payment dates, or scheduling tasks avoiding non-working days in Colombia.

Validates a postal code format for a given Latin American country using the official pattern for that country. Returns { valid: boolean, postal_code: string, country: string, format: string }. Supports BR (8-digit CEP), MX (5-digit CP), CL (7-digit with dash), AR (4-digit legacy or CPA alphanumeric), CO (6-digit). Use in e-commerce checkout validation, address verification, or logistics workflows across LatAm markets.

Returns the typical and legal B2B payment terms for a given Latin American country — default payment period, common commercial practices, and late payment rules where defined by law. Returns { country, default_days, common_terms, late_payment_notes, currency, notes }. Supports BR, MX, CL, AR, CO. Use when generating invoices, setting payment due dates, or automating accounts receivable workflows in LatAm markets. Information provided as reference only — not legal advice.

Returns the mandatory fields required on a valid electronic invoice for a given Latin American country, based on official tax authority requirements. Returns { country, invoice_type, mandatory_fields: [], electronic_system, notes }. Covers NF-e/NF-C (Brazil), CFDI 4.0 (Mexico), DTE (Chile), Factura Electrónica (Argentina/Colombia). Use when generating invoices for LatAm customers, validating invoice templates, or building invoice compliance checks in agent workflows. Information provided as reference only — not legal advice.

Returns all VAT/IVA rules for a given Latin American country — standard rate, reduced rates, exempt categories, withholding rules, and special regimes. Returns { country, standard_rate, reduced_rates, exempt_categories, withholding, special_regimes, currency, notes }. Supports BR, MX, CL, AR, CO. Brazil returns ICMS/ISS/PIS/COFINS structure. Use when calculating LatAm invoice taxes, determining correct rate for e-commerce checkout, or building tax compliance workflows. Information provided as reference only — not legal or tax advice.

Returns the current e-invoicing (electronic invoicing) obligations for a given Latin American country — whether mandatory for B2B/B2G/B2C, the electronic system used, required formats, and key compliance notes. Returns { country, b2b_mandatory, b2g_mandatory, b2c_mandatory, system, formats, mandatory_since, notes }. Supports BR, MX, CL, AR, CO. Use when building invoice generation systems, determining compliance requirements for LatAm customers, or automating invoice submission workflows.

Returns all public holidays that fall within a given date range for a specified Latin American country. Returns { country, start_date, end_date, total_holidays, holidays: [{date, name, name_en}] }. Supports BR, MX, CL, AR, CO. Use when calculating SLA periods, project timelines, delivery windows, or any workflow that must skip non-working days across LatAm countries.

Counts the number of working days between two dates (inclusive) for a given Latin American country, excluding weekends and that country's national public holidays (including moveable Easter-based holidays). Returns { country, start_date, end_date, working_days, holidays_excluded }. Supports BR, MX, CL, AR, CO. Use when calculating cross-border SLA periods, invoice payment deadlines, or project timelines that must account for different national holiday calendars across LatAm.

Calculates the next valid payment date for a given Latin American country, skipping weekends and national public holidays (fixed and moveable Easter-based). Supports rules: 'last_working_day_of_month' (salary payment in BR/AR), 'first_working_day_of_month', 'nth_working_day' (e.g. 5th working day for BR salary), 'next_working_day'. Returns { country, reference_date, rule, result_date }. Use when scheduling salary payments, NF-e/CFDI payment due dates, or any automated payment workflow that must avoid non-working days in LatAm.

Validates whether an invoice JSON object contains the mandatory fields required for a valid electronic invoice in a given Latin American country, based on official tax authority requirements (SEFAZ, SAT, SII, AFIP, DIAN). Returns { valid: boolean, country, missing_fields: [], present_fields: [], warnings: [] }. Use when building invoice generation pipelines, pre-submission validation, or compliance checks in agent workflows. Information is reference only — not legal advice.

Calculates a VAT/IVA breakdown for invoice line items in a given Latin American country, grouping amounts by tax rate and computing totals. For Brazil, returns ICMS, PIS, COFINS breakdown. For Mexico, returns IVA breakdown. For Chile/Argentina/Colombia, returns IVA breakdown. Returns { country, lines_summary, tax_breakdown, subtotal, total_tax, total }. Each line item requires { description, quantity, unit_price, tax_rate }.

Suggests the likely VAT/IVA treatment for a transaction in Latin American markets based on seller country, buyer country, buyer tax registration status, and operation type. Covers domestic transactions, exports (zero-rated), imports, and cross-border services. Returns { treatment, description, seller_charges_tax, applicable_rate, notes, disclaimer }. Use when building checkout tax logic, invoice generation, or cross-border LatAm compliance workflows. Always verify with a tax advisor for real transactions.

Calculates tax amounts from either a net (excluding tax) or gross (including tax) amount for a given tax rate, with country context for currency and tax label. Returns { country, net_amount, tax_amount, gross_amount, tax_rate, tax_label, currency }. Use when building pricing tools, invoice calculators, or checkout flows across LatAm markets that need to split gross prices into net + tax components.