Documentation assistant for Fiscalisto's Mexican CFDI 4.0 e-invoicing API: search docs, inspect operations and objects, and test calls in sandbox mode.
What you can do
Search and read the API documentation, in Spanish or English, page by page
List API operations by section and get full details for one operation, including parameters, body fields and SDK code samples
Describe response objects such as Invoice, Customer, Event and Error, and explain API error codes
Send a real request to the API in test mode with a test key and return the status, Request-Id and JSON response
Get a single onboarding guide covering keys, SDKs, stamping, SAT errors, webhooks and cancellation
When to use it
Useful when an assistant is helping you integrate Mexican electronic invoicing (CFDI 4.0) into an application and needs accurate endpoint, field and error details, or wants to try a request body in the sandbox before writing code.
Requirements
Remote streamable HTTP endpoint at fiscalisto.com; nothing to install. A Fiscalisto test key (fk_test_) is needed for the call_api tool, and the assistant is told to ask you for it rather than invent one. Network access to the API base at api.fiscalisto.com/v1.
Before you install
call_api makes real requests to the API, though only in test mode with a test key; the server states it never uses a live key. You are asked to supply a test API key, so share only a test key and never a production one. The server also advises keeping keys out of the browser and using an Idempotency-Key per document.
Enable the server for the chats that should use its tools.
Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.
Use with an agent
Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.
Read https://sourceweft.com/mcp/com.fiscalisto%2Fdocs/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.
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.
Takes no parameters.
search_docs
Buscar en la documentación
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.
Parametersqueryrequired
get_page
Leer una página
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.
Parameterspathrequired
list_operations
Operaciones de la API
Las operaciones de la API (operationId, método, ruta y qué hace), por sección. Úsela para encontrar la ruta correcta antes de describe_operation.
Parameterstag
describe_operation
Describir una operación
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).
Parametersfulllanguageoperationrequired
describe_object
Describir un objeto
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.
Parametersname
explain_error
Explicar un error
Qué significa un código de error de la API (el error.code de la respuesta, por ejemplo issuer_required) y cómo resolverlo.
Parameterscoderequired
call_api
Probar en modo de pruebas
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.
Todas las páginas de la documentación: guías y referencia, con su ruta y de qué tratan.
Takes no parameters.
Version history
1
v1.2.0LatestOct 29, 2026
Score
83%
83% of the applicable checks met
How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.
Reached in the last 30 daysRequired25 pts
Auth declaredRequired10 pts
Tools listedRequired15 pts
DescriptionRequired15 pts
Logo10 pts
Documentation15 pts
Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.
LicenseNot applicable
A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.