calcu.mx
Calculate Mexican payroll, taxes, inflation adjustments, IMSS pensions and severance
Calculates net salary with ISR and IMSS deductions, IVA tax, inflation adjustments using official INPC data, IMSS pensions under 1973 law, and employee severance payouts according to Mexican labor law.
Try asking Muse: "Calculate my net monthly salary after taxes and IMSS contributions for a job in Mexico City"
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Source: Found in the official MCP Registry (mx.calcu/calculadoras) · First listed October 29, 2026
Last 24 hours
Each bar is one check, every 15 minutes. Green means it answered. Last checked 2 h ago.
Is it safe to connect?
What Muse can see: It does not ask you to sign in, so it cannot see your accounts. It only sees what Muse sends it from your request.
Before it acts: Read what Muse plans to do before you approve it, and remove the app from Muse when you stop using it.
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How to add it to Muse
Not in Muse's Connectors list yet, but Muse can still use it. Copy the request below and paste it into Muse. Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
https://calcu.mx/mcpNot in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
Also use it in ChatGPT or Claude
calcu.mx is a remote MCP server, so any assistant that can add a custom connector by link can use it. Same link, same tools.
Add it to ChatGPT
- 1
Open ChatGPT settings
In ChatGPT, open Settings, then Connectors (called Apps & Connectors on some accounts).
- 2
Turn on developer mode
Under Advanced settings, switch on Developer mode. That is what lets you add a connector by link.
- 3
Create the connector
Choose Create, give it a name, paste the link as the MCP server URL, and save. If it needs a sign-in, ChatGPT asks for it here.
- 4
Use it in a chat
Start a chat, open the tools menu, pick the connector, and ask. ChatGPT asks before it runs a tool the first time.
Custom connectors need a paid ChatGPT plan, and on Team, Enterprise and Edu accounts only an admin can add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in ChatGPT
Add it to Claude
- 1
Open Claude settings
In Claude, open Settings, then Connectors.
- 2
Add a custom connector
Choose Add custom connector, give it a name, and paste the link.
- 3
Connect and use it
If it needs a sign-in, Claude sends you to it. Then turn the connector on in a chat from the tools menu and ask.
Custom connectors are available on paid Claude plans; on Team and Enterprise accounts an admin may need to add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in Claude
https://calcu.mx/mcpWhat people ask Muse to do
Technical details: safety screening, tools, response time and recent checks
Response time at the last check: 859ms. Worked in n/a of checks over 30 days.
Screening · October 29, 2026
Screened, no issues found
Screening looks for known threats and hidden instructions at the time of the check, and runs again weekly and whenever the tool list changes. It cannot see the server's code, so only connect what you need and review what Muse asks to do. How screening works.
Tools · 5
calcular_sueldo_netoCalcula la nómina de un trabajador asalariado en México (ejercicio 2026) a partir de su sueldo bruto MENSUAL: ISR retenido con la tarifa oficial del Art. 96 LISR y el subsidio al empleo, cuotas del IMSS del trabajador por rama sobre el salario base de cotización, sueldo neto y cocalcular_ivaCalcula el Impuesto al Valor Agregado (IVA) de México sobre un importe. «agregar» suma el IVA a un precio que no lo trae (precio × 1.16); «quitar» obtiene el importe sin IVA de un precio que ya lo incluye (precio ÷ 1.16); «desglosar» separa un total con IVA en base e IVA. Tasa geactualizar_por_inflacionActualiza un importe en pesos mexicanos entre dos meses con el Índice Nacional de Precios al Consumidor (INPC) general del INEGI, serie mensual oficial desde enero de 1990 hasta el último mes publicado. Devuelve los dos valores del INPC usados, el factor (INPC final ÷ INPC iniciacalcular_pension_ley73Estima la pensión mensual de cesantía en edad avanzada (60–64 años) o vejez (65) del IMSS bajo la Ley del Seguro Social de 1973, para quien empezó a cotizar antes del 1 de julio de 1997. Aplica la tabla del Art. 167 (cuantía básica + incrementos por semanas arriba de 500), el faccalcular_liquidacionCalcula lo que corresponde a un trabajador en México al terminar la relación laboral, según la Ley Federal del Trabajo. Desglosa: aguinaldo proporcional (15 días al año), vacaciones del periodo en curso más las pendientes, prima vacacional (25%), prima de antigüedad (12 días por Link
https://calcu.mx/mcpQuestions about calcu.mx in Muse
How do I connect calcu.mx to Muse?
Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use calcu.mx to help me. It is a free service with an MCP server at https://calcu.mx/mcp. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
Is calcu.mx working right now?
At the last check (October 29, 2026, 17:16 UTC) the endpoint was working, answering in 859ms. It is checked every 15 minutes.
Is calcu.mx safe to connect to Muse?
It was screened on October 29, 2026 with the result "screened, no issues found". Screening checks the domain against threat feeds and reads the tools for hidden instructions and requests for passwords or card numbers. It cannot see the server's code, so grant only the access you need.
What can calcu.mx do in Muse?
It exposes 5 tools, including calcular_sueldo_neto, calcular_iva, actualizar_por_inflacion, calcular_pension_ley73. For example, you could ask Muse: "Calculate my net monthly salary after taxes and IMSS contributions for a job in Mexico City"
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