100% onlineEvery co-owner coveredFiled with the Agencia Tributaria
Your Spanish home, sorted.
Add our MCP server to your AI assistant: it works out the Modelo 210 of your Spanish home, tells you when each return is due and what your town’s cadastral values mean, with the rules of our simulator. Free, with no sign-in.
Server address
https://casitatax.com/mcp
Three tools, which your assistant calls when your question needs them. Each answer cites its sources and links to our simulator.
Each owner’s tax for the year, whether the home was let or not, with the method used and a link that opens the simulator with your answers.
“We live in Sweden and own a flat in Torrevieja, half each. How much Modelo 210 do we owe for last year?”
Which return is due when, for a home not let, let or sold, with the windows that change from tax year 2026.
“We sold our house in Spain in March. When is the Modelo 210 due?”
The year of its last revaluation, the imputed-income rate that follows from it (1.1% or 2%), and its IBI rate, from the Catastro’s and Hacienda’s open data.
“Were the cadastral values of Jávea revised? Which rate applies to us?”
On claude.ai and in the desktop app, on every plan: the Free plan allows one custom connector.
https://casitatax.com/mcp
On a Team or Enterprise plan, an Owner adds it for everyone under Organization settings › Connectors; each member then connects it.
In Claude Code, one command:
claude mcp add --transport http casitatax https://casitatax.com/mcp
The menu names are those of the English interface: yours shows them in your language.
On chatgpt.com, in your browser. Whether you can add a server depends on your plan and, on a work account, on your workspace’s settings.
https://casitatax.com/mcp
The menu names are those of the English interface: yours shows them in your language.
Only what a tool needs: the figures of your home (cadastral value, rent, expenses, days let, shares), where its owners live, a town or a date of sale. Never a name, an NIE, an address or a contact detail. Our server works out the answer and keeps nothing.
Your conversation stays with your assistant’s provider (Anthropic, OpenAI), under its own privacy policy. Our privacy policy says the rest.
The answers are estimates under the rules of the tax years we cover, not tax advice: your IBI receipt, your deeds and the Agencia Tributaria’s texts prevail.
The simulator gives the same figures, and we can file your returns from abroad.
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