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Mexican Payroll & Tax Calculator MCP Server

by tinyapis Your server? Claim it
not responding

Mexican Payroll & Tax Calculator is listed as active in the registry but did not answer our last check. It exposes 4 tools.

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

Uptime history 91 days of history · worst day 0%
91 days agonow
0.0%
Uptime 24h
0 of 91 checks
4
Tools
read from the server
40 ms
Response time
average over 24h
open, no key
Access
streamable-http

Mexican Payroll & Tax Calculator does not always answer

Over the last week it answered 0.0% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 13 min ago.

run in your terminal
claude mcp add mx-fiscal --transport http https://fiscal.tinyapis.dev/mcp
Settings → Connectors → Add custom connector, then paste this address
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
{
  "servers": {
    "mx-fiscal": {
      "type": "http",
      "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

URLTransportStateLatencyChecked
https://fiscal.tinyapis.dev/mcp streamable-http answering 40 ms 13 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 0 of 91 checks got a reply (0.0%), average response time 40 ms. The bar chart above shows every period we have measured.
The registry lists Mexican Payroll & Tax Calculator as active — why does it not respond?
The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.
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 in the form 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.