Mexican Payroll & Tax Calculator MCP Server

dev.tinyapis/mx-fiscal

answering

Mexican Payroll & Tax Calculator is answering right now. Last checked 11 min ago. It exposes 4 tools.

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

Uptime history 40 hours of history

40 hours agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

155 ms

Response time

average over 24h

open, no key

Access

streamable-http

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 11 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	158 ms	11 min ago

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 91 of 91 checks got a reply (100.0%), average response time 155 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 155 ms on average, which is faster than 72% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.