mcp server
Mexican Payroll & Tax Calculator
Deterministic Mexican payroll & tax math: finiquito, ISR, aguinaldo, IMSS (2026 tables).
Description as published by the maintainer. Source
- version 1.0.0
- active
active — Registry entry last updated 2026-07-22.
What this server can do
4 functions, named and described by the server itself. Parameter names are shown because they say more about what a function does than its name usually does.
calc_aguinaldo(year, days_worked, daily_salary, aguinaldo_days, paid_in_january, monthly_ordinary_salary)- Compute a Mexican aguinaldo (year-end bonus): gross, the UMA-based exempt portion, the taxable portion, its ISR, and the net. Minimum 15 days by law. Do NOT compute from memory — the exemption is UMA-indexed per year. Returns gross, taxable, exempt, isr, net, and the days used. Required: daily_salary, days_worked.
calc_finiquito(year, zone, hire_date, deductions, daily_salary, pending_days, paid_in_january, termination_date, termination_type, vacation_proration, prima_vacacional_pct, monthly_ordinary_salary, include_20_days_per_year)- Compute a Mexican finiquito/liquidación (severance) for a resignation or an unjustified dismissal: prorated christmas bonus, vacations, vacation premium, pending salary, and (for dismissal) 90-day + 20-day/year severance and the seniority premium, with Art. 93 exemptions and separation ISR. Do NOT compute this from memory — LFT bands, UMA exemptions, and the SDI integration factor are table-driven. Returns per-concept gross/exempt/taxable, totals, ISR, deductions, and net_total. Required: termination_type, daily_salary, hire_date, termination_date.
calc_imss(sdi, days, year, zone, rt_premium, daily_salary, paid_in_january, seniority_years)- Compute Mexican IMSS social-security contributions: the SDI (integrated daily wage by seniority) and SBC, plus employer/worker quotas for the five insurance branches. The work-risk premium (rt_premium) is an input. Provide either seniority_years (to derive the SDI) or an explicit sdi. Do NOT compute from memory — quota tables and UMA caps are table-driven. Returns sdi, sbc, employer_total, worker_total, grand_total, and a per-branch breakdown. Required: rt_premium.
calc_isr(year, income, period, paid_in_january)- Compute Mexican ISR (income tax) withholding for a monthly or annual income using the official SAT tables and employment subsidy. Do NOT estimate ISR from memory — brackets and subsidy change yearly and must come from this deterministic tool. Returns tax, subsidy_applied, withholding, the period, and the tax-table year used. Required: income.
Last successful function declaration observed on . Source: https://fiscal.tinyapis.dev/mcp. We list what the server declared; we do not call any of these functions.
Endpoint status observed on . Source: https://fiscal.tinyapis.dev/mcp.
Signals
These are separate measurements of different things. They are deliberately not combined into one score, because a popularity number that mixes website traffic with saves and stars cannot be checked or acted on.
| Signal | Value | What it measures | Window | Observed | Source |
|---|---|---|---|---|---|
| Latest published version | 1.0.0 | Latest version string the maintainer published to the registry. | as of fetch | Model Context Protocol | |
| Registry record last updated | 2026-07-22 | When the registry record was last updated by its maintainer. | point in time | Model Context Protocol | |
| First listed in the MCP Registry | 2026-07-22 | Date this server was first published to the official MCP Registry. Not a usage or quality measure. | point in time | Model Context Protocol | |
| mcp tools declared | 4 tools | Number of functions the server itself declared when asked to list them. This is what the server offers an agent, not a measure of how well any of them work. | as of probe | fiscal.tinyapis.dev | |
| mcp endpoint status | ok | The server listed 4 functions when asked. | as of probe | fiscal.tinyapis.dev |
Where to get it
This record as data
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