Mexican Payroll & Tax Calculator MCP Server

by tinyapis Your server? Claim it

answering

Mexican Payroll & Tax Calculator is answering right now. Last checked moments ago. It exposes 4 tools.

Deterministic Mexican payroll & tax math: finiquito, ISR, aguinaldo, IMSS (2026 tables).

Uptime history 48 days of history · worst day 99%

48 days agonow

100.0%

Uptime 24h

92 of 92 checks

Tools

read from the server

163 ms

Response time

average over 24h

open, no key

Access

streamable-http

Nothing serious here today

Today is the operative word: we check Mexican Payroll & Tax Calculator every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 0 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add mx-fiscal --transport http https://fiscal.tinyapis.dev/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "mx-fiscal": {
      "url": "https://fiscal.tinyapis.dev/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.mx-fiscal]
url = "https://fiscal.tinyapis.dev/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "mx-fiscal": {
      "url": "https://fiscal.tinyapis.dev/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "mx-fiscal": {
      "url": "https://fiscal.tinyapis.dev/mcp"
    }
  }
}

Available tools 4

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

calc

calc_aguinaldo

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.

calc_finiquito

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.

calc_imss

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.

calc_isr

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.

Endpoints

URL	Transport	State	Latency	Checked
https://fiscal.tinyapis.dev/mcp	streamable-http	answering	144 ms	0 min ago

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Mexican Payroll & Tax Calculator — questions

Answers built from our own checks of this server.

What can Mexican Payroll & Tax Calculator do?

It exposes 4 tools, read directly from the server on our last check. Among them: calc_aguinaldo, calc_finiquito, calc_imss, calc_isr. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Mexican Payroll & Tax Calculator working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 163 ms. The bar chart above shows every period we have measured.

How do I connect Mexican Payroll & Tax Calculator?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Mexican Payroll & Tax Calculator need an API key?

No. Mexican Payroll & Tax Calculator completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 4 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Mexican Payroll & Tax Calculator?

It answers our handshake in 163 ms on average, which is faster than 74% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.