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Fiscal y nomina MX — SAT, ISR, CFDI, IMSS, finiquito

by danielasalgadov · remote · no sign-in to list tools · v0.4.0 · published by GitHub user danielasalgadov

Fiscal y nomina MX: recargos, ISR, CFDI, RESICO, calendario, IMSS, aguinaldo, finiquito.

Changes · 10
CompareRegistry entry

10 tools: 10 change things.

Scanned Oct 21, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http fiscal https://menteorama-fiscal-mcp.menteorama.workers.dev/mcp

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

10 tools

Changes things 10Claude Code: ask
  • fiscal_aguinaldoCalcula el aguinaldo (LFT Art.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Calcula el aguinaldo (LFT Art. 87): bruto (proporcional si aplica), parte exenta (30 UMA), parte gravada e ISR estimado. Determinista. Informativo, no asesoria fiscal.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false
  • fiscal_calendarioObligaciones fiscales y fechas limite de un regimen fiscal mexicano.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Obligaciones fiscales y fechas limite de un regimen fiscal mexicano. Con `mes` (1-12) calcula la fecha limite del pago mensual de ese periodo (dia 17 del mes siguiente, ajustado al siguiente dia habil por fin de semana). Con `rfc6` (6o digito del RFC) estima la extension del decreto de facilidades. Informativo, no asesoria fiscal.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false
  • fiscal_cfdi_validarValida la coherencia de un CFDI 4.0 antes de emitirlo: relacion entre tipo de comprobante, uso, metodo/forma de pago y tipo de receptor, contra los catalogos del SAT.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Valida la coherencia de un CFDI 4.0 antes de emitirlo: relacion entre tipo de comprobante, uso, metodo/forma de pago y tipo de receptor, contra los catalogos del SAT. Determinista. NO timbra ni sustituye al PAC. Informativo, no asesoria fiscal.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false
  • fiscal_finiquitoCalcula finiquito (renuncia/termino) o liquidacion (despido injustificado), LFT: aguinaldo proporcional, vacaciones + prima, y para liquidacion 3 meses + 20 dias/anio + prima de an…No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Calcula finiquito (renuncia/termino) o liquidacion (despido injustificado), LFT: aguinaldo proporcional, vacaciones + prima, y para liquidacion 3 meses + 20 dias/anio + prima de antiguedad. Devuelve montos BRUTOS. La procedencia legal y el ISR se confirman con abogado/contador. No asesoria.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false
  • fiscal_imssCalcula las cuotas IMSS obrero-patronales del periodo sobre el SBC diario (topado a 25 UMA): Enfermedades y Maternidad, Invalidez y Vida, Retiro, Cesantia y Vejez (curva patronal 2…No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Calcula las cuotas IMSS obrero-patronales del periodo sobre el SBC diario (topado a 25 UMA): Enfermedades y Maternidad, Invalidez y Vida, Retiro, Cesantia y Vejez (curva patronal 2026 por veces UMA), Guarderias, Riesgos de Trabajo e INFONAVIT. Determinista. Da sbc_diario o salario_diario. Estimacion (la prima RT es por empresa; los dias reales dependen del mes). Informativo, no asesoria.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false
  • fiscal_isr_estimadoESTIMA el ISR anual segun regimen, ingresos y deducciones, con la tarifa progresiva Art.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    ESTIMA el ISR anual segun regimen, ingresos y deducciones, con la tarifa progresiva Art. 152 (Anexo 8 RMF 2026) o la tasa aplicable (RESICO/PM). Es una ESTIMACION: el ISR real depende de deducciones exactas, acreditamientos y pagos provisionales. Informativo, no asesoria fiscal.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false
  • fiscal_isr_retencionCalcula la retencion MENSUAL de ISR de salarios (Art.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Calcula la retencion MENSUAL de ISR de salarios (Art. 96 LISR) menos el subsidio al empleo vigente (DOF 2025). Determinista. Devuelve ISR de tarifa, subsidio aplicado y retencion final. Informativo, no asesoria fiscal.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false
  • fiscal_recargosCalcula recargos por mora + actualizacion por pago tardio de una contribucion en Mexico (CFF Art.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Calcula recargos por mora + actualizacion por pago tardio de una contribucion en Mexico (CFF Art. 17-A y 21). Determinista y auditable. Los meses se cuentan dia-a-dia desde el vencimiento (cada fraccion = mes completo). Si no se dan los INPC, el total NO incluye actualizacion y sera mayor. Informativo, no asesoria fiscal.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false
  • fiscal_regimen_factoresDevuelve los FACTORES para elegir regimen fiscal en Mexico (topes de ingreso, base gravable, tasas, exclusiones) segun tipo de persona, ingresos anuales y actividad.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Devuelve los FACTORES para elegir regimen fiscal en Mexico (topes de ingreso, base gravable, tasas, exclusiones) segun tipo de persona, ingresos anuales y actividad. INFORMA, NO DECIDE: nunca recomienda un regimen; la eleccion es del contribuyente con su contador. Informativo, no asesoria fiscal.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false
  • fiscal_valores_vigentesDevuelve los valores fiscales vigentes verificados de Mexico para un anio (UMA, salario minimo, tasas de recargo y parcialidades), cada uno con su fuente oficial.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Devuelve los valores fiscales vigentes verificados de Mexico para un anio (UMA, salario minimo, tasas de recargo y parcialidades), cada uno con su fuente oficial. Es el 'moat': datos mantenidos y verificados contra DOF/LIF/CFF. Informativo, no asesoria fiscal.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 0.4.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http fiscal https://menteorama-fiscal-mcp.menteorama.workers.dev/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [],
    "ask": [
      "mcp__fiscal__fiscal_recargos",
      "mcp__fiscal__fiscal_valores_vigentes",
      "mcp__fiscal__fiscal_calendario",
      "mcp__fiscal__fiscal_regimen_factores",
      "mcp__fiscal__fiscal_cfdi_validar",
      "mcp__fiscal__fiscal_isr_estimado",
      "mcp__fiscal__fiscal_isr_retencion",
      "mcp__fiscal__fiscal_imss",
      "mcp__fiscal__fiscal_aguinaldo",
      "mcp__fiscal__fiscal_finiquito"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as fiscal. Review it before you use it.