CasitaTax MCP
An official MCP server by CasitaTax that allows AI agents to estimate Spanish non-resident income tax (Modelo 210), check filing deadlines, and retrieve town cadastral data without requiring user sign-in.
Endpoint and access
No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.
https://casitatax.com/mcpWhat you can do with it
- Estimate Modelo 210 tax liability for a Spanish home
- Check specific filing deadlines for non-resident tax
- Retrieve town cadastral data and IBI rates
Source and maintenance
Protocol and capabilities
- Server
- casitatax 1.0.0
- MCP protocol
- 2025-06-18
- Tools
- 3 advertised
- Resources
- Not advertised
- Resource templates
- Not advertised
- Prompts
- Not advertised
{
"tools": {
"listChanged": true
}
}Server-provided instructions
Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.
Tools
3 advertised
estimate_modelo_210 — Estimate Modelo 210
Use this when a non-resident owner of a home in Spain asks how much Modelo 210 (Spanish non-resident income tax on the property) they owe for a tax year. Works out each owner's tax on the imputed income of the days the home wasn't let and on the rent, as CasitaTax's simulator does, and returns the method, the sources and a link that opens the simulator with the same answers.
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"occupancy",
"residence",
"cadastral_value"
],
"properties": {
"rent": {
"type": "number",
"maximum": 10000000,
"minimum": 0,
"description": "For rented or part: the rent received for the whole home during the tax year, in euros, before expenses."
},
"owners": {
"type": "integer",
"maximum": 6,
"minimum": 1,
"description": "Number of owners, 1 to 6, with equal shares. Default 1."
},
"revised": {
"enum": [
"yes",
"no",
"unknown"
],
"type": "string",
"description": "Whether the town's cadastral values were revised collectively and in force since the year the rules require (town_cadastral_data tells). Default unknown: the tax is then a range."
},
"expenses": {
"type": "number",
"maximum": 10000000,
"minimum": 0,
"description": "For rented or part, owners resident in the EU or the EEA: the deductible expenses of the rented period for the whole home, in euros. Ignored for others, who are taxed on the gross rent."
},
"language": {
"enum": [
"da",
"de",
"en",
"es",
"fr",
"nl",
"no",
"fi",
"sv"
],
"type": "string",
"description": "Language of the CasitaTax pages linked in the answer: da, de, en, es, fr, nl, no, fi or sv. Default en."
},
"tax_year": {
"type": "integer",
"maximum": 9007199254740991,
"minimum": -9007199254740991,
"description": "Tax year (the year the income relates to). Default: the latest year whose rules are final."
},
"occupancy": {
"enum": [
"unrented",
"rented",
"part"
],
"type": "string",
"description": "unrented: not let during the tax year (own use, empty); rented: let all year; part: let part of the year."
},
"residence": {
"enum": [
"eu",
"uk",
"other"
],
"type": "string",
"description": "Where the owners live for tax purposes: eu (a country of the EU, or Iceland, Norway, Liechtenstein), uk (United Kingdom), other (anywhere else). One value for all the owners."
},
"rented_days": {
"type": "integer",
"maximum": 365,
"minimum": 1,
"description": "For occupancy part: the number of days the home was let during the tax year."
},
"shares_percent": {
"type": "array",
"items": {
"type": "number",
"maximum": 100,
"exclusiveMinimum": 0
},
"maxItems": 6,
"minItems": 1,
"description": "Each owner's share of the home in percent, when the shares differ (e.g. [60, 40]); they add up to 100. Replaces owners."
},
"cadastral_value": {
"type": "number",
"maximum": 100000000,
"description": "The home's valor catastral in euros, for the tax year: on the IBI receipt (total, not just the land or the building).",
"exclusiveMinimum": 0
}
}
}{
"readOnlyHint": true,
"openWorldHint": false,
"idempotentHint": true,
"destructiveHint": false
}modelo_210_deadlines — Modelo 210 deadlines
Use this when someone asks when a Spanish Modelo 210 (non-resident income tax) is due for a home in Spain: not let, let all year, let part of the year, or sold. Returns each return's filing window, the direct debit's last day, whether the window is open today, what filing late costs, and the sources (Orden HAC/623/2026 changed the windows from tax year 2026).
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"situation"
],
"properties": {
"language": {
"enum": [
"da",
"de",
"en",
"es",
"fr",
"nl",
"no",
"fi",
"sv"
],
"type": "string",
"description": "Language of the CasitaTax pages linked in the answer: da, de, en, es, fr, nl, no, fi or sv. Default en."
},
"sale_date": {
"type": "string",
"pattern": "^\\d{4}-\\d{2}-\\d{2}$",
"description": "For sold: the day of the sale (the deed), YYYY-MM-DD. Without it, the rule is given without dates."
},
"situation": {
"enum": [
"not_rented",
"rented",
"rented_part_of_year",
"sold"
],
"type": "string",
"description": "not_rented: the home wasn't let (own use, empty); rented: let all year; rented_part_of_year: let some of the year; sold: the home was sold."
}
}
}{
"readOnlyHint": true,
"openWorldHint": false,
"idempotentHint": true,
"destructiveHint": false
}town_cadastral_data — Town cadastral data
Use this when someone needs to know about a Spanish town's cadastral values: the year of its last general revaluation, whether that means the 1.1% or the 2% imputed-income rate for a tax year (pass the revised value to estimate_modelo_210), and its urban IBI rate on homes. From the Catastro's statistics and the Ministerio de Hacienda's open data; País Vasco and Navarra aren't covered.
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"ine": {
"type": "string",
"pattern": "^\\d{5}$",
"description": "The town's 5-digit INE code, instead of town and province (e.g. 29069 for Marbella)."
},
"town": {
"type": "string",
"maxLength": 100,
"description": "The municipality's name, in Spanish or in the regional language (e.g. Marbella, Jávea or Xàbia). Not a district or an urbanisation: the town it belongs to."
},
"language": {
"enum": [
"da",
"de",
"en",
"es",
"fr",
"nl",
"no",
"fi",
"sv"
],
"type": "string",
"description": "Language of the CasitaTax pages linked in the answer: da, de, en, es, fr, nl, no, fi or sv. Default en."
},
"province": {
"type": "string",
"maxLength": 60,
"description": "The town's province (e.g. Málaga, Alicante, Illes Balears, Santa Cruz de Tenerife), or its 2-digit code. Needed with town."
},
"tax_year": {
"type": "integer",
"maximum": 9007199254740991,
"minimum": -9007199254740991,
"description": "Tax year (the year the income relates to). Default: the latest year whose rules are final."
}
}
}{
"readOnlyHint": true,
"openWorldHint": false,
"idempotentHint": true,
"destructiveHint": false
}Prompts
Not advertised
Resources
Not advertised
30-day availability
Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.
- Successful checks
- 1 of 1 (100%)
- Average latency
- 319 ms
- 95th percentile latency
- 319 ms
Maintenance history
Public check and source-refresh events. Editorial and ownership records remain private.
- · probe · passed · 319 ms · metadata changed · 3 tool(s)
Connect from your client
Each snippet registers the same endpoint; pick the client you use.
Claude Code
claude mcp add --transport http casitatax-mcp https://casitatax.com/mcpCodex
codex mcp add casitatax-mcp --url https://casitatax.com/mcpCursor
{
"mcpServers": {
"casitatax-mcp": {
"url": "https://casitatax.com/mcp"
}
}
}Cline
{
"mcpServers": {
"casitatax-mcp": {
"type": "streamableHttp",
"url": "https://casitatax.com/mcp",
"disabled": false
}
}
}VS Code
{
"servers": {
"casitatax-mcp": {
"type": "http",
"url": "https://casitatax.com/mcp"
}
}
}Gemini CLI
gemini mcp add --transport http casitatax-mcp https://casitatax.com/mcpClaude Desktop
{
"mcpServers": {
"casitatax-mcp": {
"url": "https://casitatax.com/mcp"
}
}
}Windsurf
{
"mcpServers": {
"casitatax-mcp": {
"serverUrl": "https://casitatax.com/mcp"
}
}
}Let your agent find its tools
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