Fiscalisto API docs

com.fiscalisto/docsfiscalisto.comstreamable-httpv1.2.0Scanned 48 minutes ago

Docs for Fiscalisto's Mexican e-invoicing API (CFDI 4.0): search, operations, SDK code, errors.

9 tools: 3 change things and 6 only read.

Reads private data · 2
Reads text others write · 0
Can send data out · 0
2 findings

Anlyon alternative

3 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

Import an OpenAPI spec →

Tools

Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.

9 tools

Changes things 3Creates or changes something that can be changed back.Claude Code: ask

call_apiHace una solicitud real a la API en modo de pruebas con la llave fk_test_ de la persona (nunca una fk_live_) y devuelve el código, el Request-Id y el JSON de la respuesta.No findings
Why it is in this group
- The name "call_api" says "call": a word for a change.
Description, as the server wrote it
Hace una solicitud real a la API en modo de pruebas con la llave fk_test_ de la persona (nunca una fk_live_) y devuelve el código, el Request-Id y el JSON de la respuesta. Para probar un cuerpo antes de escribir el código. Timbra con el emisor de pruebas del SAT, sin costo.
Annotations the server declares
- readOnlyHint: false
- destructiveHint: false
- openWorldHint: false
explain_errorQué significa un código de error de la API (el error.code de la respuesta, por ejemplo issuer_required) y cómo resolverlo.1 finding
Why it is in this group
- The name "explain_error" says "explain": a word for reading.
- The input takes a statement or command to run (input.code), which can change anything it can reach.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Findings
- Warn
  The server marks "explain_error" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
  Matched text
  annotations: {"readOnlyHint":true,"openWorldHint":false}; The name "explain_error" says "explain": a word for reading.
  What this check looks for
Description, as the server wrote it
Qué significa un código de error de la API (el error.code de la respuesta, por ejemplo issuer_required) y cómo resolverlo.
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false
get_startedStart here when asked to add Fiscalisto or Mexican invoicing (CFDI 4.0) to an app.1 finding
Why it is in this group
- The name "get_started" says "get": a word for reading.
- The description's first verb is "start": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Findings
- Warn
  The server marks "get_started" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
  Matched text
  annotations: {"readOnlyHint":true,"openWorldHint":false}; The name "get_started" says "get": a word for reading.
  What this check looks for
Description, as the server wrote it
Start here when asked to add Fiscalisto or Mexican invoicing (CFDI 4.0) to an app. Empiece aquí: cómo integrar la API en una app de principio a fin (llave, SDK de su lenguaje, timbrar con Idempotency-Key, datos del cliente, errores del SAT, webhooks firmados, cancelar, probar sin costo y pasar a producción), en una página.
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false

Only reads 6Looks things up and changes nothing.Show 6 read-only tools

describe_objectLos campos de un objeto que contesta la API (Invoice, Customer, Event, Error…), con su tipo y significado, y un ejemplo.No findings
Why it is in this group
- The name "describe_object" says "describe": a word for reading.
Description, as the server wrote it
Los campos de un objeto que contesta la API (Invoice, Customer, Event, Error…), con su tipo y significado, y un ejemplo. Sin nombre, la lista de objetos.
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false
describe_operationTodo sobre una operación: parámetros, cada campo del cuerpo (tipo, si es obligatorio, límites), ejemplos, el código con el SDK del lenguaje que elija y qué objeto contesta (sus cam…No findings
Why it is in this group
- The name "describe_operation" says "describe": a word for reading.
Description, as the server wrote it
Todo sobre una operación: parámetros, cada campo del cuerpo (tipo, si es obligatorio, límites), ejemplos, el código con el SDK del lenguaje que elija y qué objeto contesta (sus campos con describe_object, o aquí con full).
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false
get_pageEl texto completo (Markdown) de una página de la documentación, por su ruta, por ejemplo /docs/api/facturas o /docs/api/referencia/facturas/create-invoice.Reads private dataNo findings
Why it is in this group
- The name "get_page" says "get": a word for reading.
What it can reach
- private-dataThe description's first sentence says "doc": it reads documents.
Description, as the server wrote it
El texto completo (Markdown) de una página de la documentación, por su ruta, por ejemplo /docs/api/facturas o /docs/api/referencia/facturas/create-invoice.
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false
list_operationsLas operaciones de la API (operationId, método, ruta y qué hace), por sección.No findings
Why it is in this group
- The name "list_operations" says "list": a word for reading.
Description, as the server wrote it
Las operaciones de la API (operationId, método, ruta y qué hace), por sección. Úsela para encontrar la ruta correcta antes de describe_operation.
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false
list_pagesTodas las páginas de la documentación: guías y referencia, con su ruta y de qué tratan.No findings
Why it is in this group
- The name "list_pages" says "list": a word for reading.
Description, as the server wrote it
Todas las páginas de la documentación: guías y referencia, con su ruta y de qué tratan.
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false
search_docsBusca en la documentación de la API de facturación de Fiscalisto (guías y referencia) y devuelve las páginas que más coinciden.Reads private dataNo findings
Why it is in this group
- The name "search_docs" says "search": a word for reading.
What it can reach
- private-dataThe name "search_docs" says "search" and "doc": it reads documents.
Description, as the server wrote it
Busca en la documentación de la API de facturación de Fiscalisto (guías y referencia) y devuelve las páginas que más coinciden. Entiende español e inglés («cancelar factura», «verify webhook signature»). Úsela antes de escribir código contra la API.
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.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

No private-data, untrusted-input, outbound path in this server alone: no tool is tagged untrusted-input or outbound.

Reads private data2: Reads files, mail, messages, databases, secrets, calendars or repositories.; get_page
search_docs
Reads text others write0: Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
Can send data out0: Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Findings

Matches of fixed checks, with the text they matched.

2 warn

Warnget_started
The server marks "get_started" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
Matched text
annotations: {"readOnlyHint":true,"openWorldHint":false}; The name "get_started" says "get": a word for reading.
What this check looks for
Warnexplain_error
The server marks "explain_error" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
Matched text
annotations: {"readOnlyHint":true,"openWorldHint":false}; The name "explain_error" says "explain": a word for reading.
What this check looks for

History

Changes to its tool definitions and to its remote endpoint, newest first.

No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.

All changes to this server

Install

Pinned to version 1.2.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http docs https://fiscalisto.com/docs/api/mcp

claude mcp add --transport http docs https://fiscalisto.com/docs/api/mcp

Run in a terminal.

Claude Code permissions

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

.claude/settings.json

{
  "permissions": {
    "allow": [
      "mcp__docs__search_docs",
      "mcp__docs__get_page",
      "mcp__docs__list_operations",
      "mcp__docs__describe_operation",
      "mcp__docs__describe_object",
      "mcp__docs__list_pages"
    ],
    "ask": [
      "mcp__docs__get_started",
      "mcp__docs__explain_error",
      "mcp__docs__call_api"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as docs. Review it before you use it.

Capability tags behind 2 rules

mcp__docs__search_docs private-data
mcp__docs__get_page private-data

Keep the decision: fail CI when the tools change, follow every change, or show a badge.

Pin in CI

Fail a build when the tools you reviewed are not the tools the server serves today.

curl -s "https://anlyon.dev/api/v1/servers/com.fiscalisto/docs/verify?hash=90b8a924d934369fb3fd8e5b37be2d6b6962cf4f23a6dd5c694f9d1bd88f9780" | jq -e '.changed == false'

Pinned hash 90b8a924d934, from Oct 27, 2026, 21:18 UTC.

Watch

Get told when its tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/com.fiscalisto/docs/changes.xml

An Atom feed. Works in any feed reader or Slack's RSS app.

Badge

[![anlyon.dev](https://anlyon.dev/badge/com.fiscalisto/docs.svg)](https://anlyon.dev/servers/com.fiscalisto/docs)

Source: MCP Registry. Synced Oct 27, 2026, 21:17 UTC.