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Fiscalisto API docs MCP Server

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Fiscalisto API docs is answering right now. Last checked 1 min ago. It exposes 9 tools.

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

Uptime history 6 days of history
6 days agonow
100.0%
Uptime 24h
92 of 92 checks
9
Tools
read from the server
615 ms
Response time
average over 24h
open, no key
Access
streamable-http

Nothing serious here today

Today is the operative word: we check Fiscalisto API docs every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

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 1 min ago.

run in your terminal
claude mcp add docs --transport http https://fiscalisto.com/docs/api/mcp
Settings → Connectors → Add custom connector, then paste this address
https://fiscalisto.com/docs/api/mcp
~/.codex/config.toml
[mcp_servers.docs]
url = "https://fiscalisto.com/docs/api/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "docs": {
      "url": "https://fiscalisto.com/docs/api/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "docs": {
      "type": "http",
      "url": "https://fiscalisto.com/docs/api/mcp"
    }
  }
}

Available tools 9

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

describe
describe_object
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.
describe_operation
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).
call
call_api
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.
docs
search_docs
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.
explain
explain_error
Qué significa un código de error de la API (el error.code de la respuesta, por ejemplo issuer_required) y cómo resolverlo.
operations
list_operations
Las operaciones de la API (operationId, método, ruta y qué hace), por sección. Úsela para encontrar la ruta correcta antes de describe_operation.
page
get_page
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.
pages
list_pages
Todas las páginas de la documentación: guías y referencia, con su ruta y de qué tratan.
started
get_started
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.

Endpoints

URLTransportStateLatencyChecked
https://fiscalisto.com/docs/api/mcp streamable-http answering 253 ms 1 min ago

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Fiscalisto API docs — questions

Answers built from our own checks of this server.

What can Fiscalisto API docs do?
It exposes 9 tools, read directly from the server on our last check. Among them: call_api, describe_object, describe_operation, explain_error, get_page, get_started and 3 more. 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 Fiscalisto API docs working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 615 ms. The bar chart above shows every period we have measured.
How do I connect Fiscalisto API docs?
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 Fiscalisto API docs need an API key?
No. Fiscalisto API docs completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 9 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Fiscalisto API docs?
It answers our handshake in 615 ms on average, which is faster than 18% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.