Factulit APIPublic API documentation for invoicing and commerce integrations.

Sync clients, order statuses, and orders with Factulit's public API.

Start Building

API Reference

Commerce Sync

Send clients, order statuses, and orders from server-side commerce integrations.

Fiscal Context

Order payloads can include invoice lifecycle intent, tax breakdowns, refunds, discounts, and customer fiscal identity.

Safe JSON Contract

The API uses API-key authentication, JSON envelopes, and explicit error responses for validation and quota failures.

Current API Version

Version	Base URL	Base path	Status	Intended consumers
v1	`https://api.factulit.es`	`/api/v1`	Recommended	Server-side commerce integrations

Test integrations against https://api.sandbox-factulit.es, which files records with AEAT pre-production and has no fiscal effect. See Getting Started for how keys map to environments.

Documentation Scope

This documentation covers supported public integration endpoints. Any route, parameter, response field, or behavior not described here should be treated as unsupported for third-party integrations.

Recommended Path

New integrations should start on https://api.sandbox-factulit.es/api/v1 and send JSON with an X-API-KEY header, then move to https://api.factulit.es/api/v1 with a production key.