# Declarar Fácil

> Bookkeeping and AEAT tax forms (Modelo 303, 130, 390, 100) for Spanish autónomos, driven by the user's own AI agent.
> The agent reads invoices, bank statements and past forms on the user's machine with its own model and submits
> structured data; this server validates, de-duplicates, stores, computes the forms with the official formulas and
> returns the AEAT upload file. The server never reads documents, never calls a language model and never stores originals.
> Pricing: the dashboard is free; the agent connection is 5 EUR per month plus IVA.

## For agents
- Start here: https://declararfacil.com/skill (SKILL.md). The site address is enough: start a connection with POST https://declararfacil.com/api/agent/v1/connect (no credential), show the person the connect_url, poll for the token, then GET /api/agent/v1/me for the remaining steps (tax profile, subscription) and the sentence to tell the person.
- A chat that can only read pages: read invoices with the public spec (https://declararfacil.com/api/agent/v1/extraction-spec?kind=invoice) and give the person save links https://declararfacil.com/importar#<percent-encoded JSON {"client","invoices":[...]}>, up to 20 invoices each; the person checks and saves them on the site.
- Without an active subscription every call except /me, /connect, the skill and OpenAPI answers 402 subscription_required with subscribe_url and tell_the_user.
- Skill package (SKILL.md, mcp.json, hashes): https://declararfacil.com/api/agent/v1/skill
- Skill version: https://declararfacil.com/api/agent/v1/skill/version
- OpenAPI 3.1: https://declararfacil.com/api/agent/v1/openapi.json (also https://declararfacil.com/openapi.json)
- Remote MCP (Streamable HTTP, bearer = the user's link token): https://declararfacil.com/api/mcp; server card: https://declararfacil.com/.well-known/mcp.json
- MCP authorization (OAuth 2.1, PKCE, dynamic client registration) for connectors that take only a URL (claude.ai, Claude Desktop, ChatGPT): https://declararfacil.com/.well-known/oauth-protected-resource/api/mcp and https://declararfacil.com/.well-known/oauth-authorization-server
- API catalog (RFC 9727): https://declararfacil.com/.well-known/api-catalog
- Extraction specs: https://declararfacil.com/api/agent/v1/extraction-spec?kind=invoice|bank_statement|modelo|certificate
- Alternative to the connect flow: a user's personal link (credential + instructions), https://declararfacil.com/agente/<token>, created in the dashboard at https://declararfacil.com/agente
- Everything in one file (this text plus SKILL.md): https://declararfacil.com/llms-full.txt

## Pages
- https://declararfacil.com/ : what the service does, for people
- https://declararfacil.com/agentes : how it works, for agents and developers
- https://declararfacil.com/sign-up : create an account
- https://declararfacil.com/privacy and https://declararfacil.com/terms : privacy policy and terms (including the data-processing agreement, GDPR art. 28)