# CasitaTax (remote · casitatax.com)

Spanish non-resident tax on a home in Spain: Modelo 210 estimate, deadlines, town cadastral data

- Trust score: 71/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `casitatax.com`: 71/100 (this document), [markdown](https://verifymcp.io/servers/com-casitatax-modelo-210/casitatax.md), [page](https://verifymcp.io/servers/com-casitatax-modelo-210/casitatax)

## Channel facts

- Endpoint: `https://casitatax.com/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-11-05.

- **Endpoint Security**: 74/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS is enforced; there's no plaintext access path.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 58/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 1180 tokens (~393/item across 3 items; 3 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 20/100
  - Stability observed for 6 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 3 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 4 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a current MCP spec version (2026-07-28).

## Install

### How do I install the CasitaTax MCP server?

CasitaTax is a hosted endpoint at https://casitatax.com/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http com-casitatax-modelo-210 'https://casitatax.com/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "com-casitatax-modelo-210": {
      "url": "https://casitatax.com/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "com-casitatax-modelo-210": {
      "type": "http",
      "url": "https://casitatax.com/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.com-casitatax-modelo-210]
url = "https://casitatax.com/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-casitatax-modelo-210": {
      "type": "remote",
      "url": "https://casitatax.com/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add com-casitatax-modelo-210 --url 'https://casitatax.com/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  com-casitatax-modelo-210:
    url: "https://casitatax.com/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "com-casitatax-modelo-210": {
      "Transport": "http",
      "Url": "https://casitatax.com/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add com-casitatax-modelo-210 -t streamable-http -u 'https://casitatax.com/mcp'
```

### Other

```json
{
  "mcpServers": {
    "com-casitatax-modelo-210": {
      "type": "http",
      "url": "https://casitatax.com/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-11-05 (score 71, +1)

No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-11-03 (score 70, +1)

No change was recorded against any check on this day. Stability & Change Management went from 10 to 13. That category is still filling its 30-day observation window: 3 days of observed history at the previous scan, 4 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-11-01 (score 69, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-31 (score 68, 0)

- [functional improvement] Stability: unverified → 0.03

### 2026-10-30 (score 68)

First indexed and scored.

## MCP tools (3)

### `estimate_modelo_210` (~495 tokens)

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.

Input parameters:

- `cadastral_value` (number, required): The home's valor catastral in euros, for the tax year: on the IBI receipt (total, not just the land or the building).
- `expenses` (number): 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` (string): Language of the CasitaTax pages linked in the answer: da, de, en, es, fr, nl, no, fi or sv. Default en.
- `occupancy` (string, required): unrented: not let during the tax year (own use, empty); rented: let all year; part: let part of the year.
- `owners` (integer): Number of owners, 1 to 6, with equal shares. Default 1.
- `rent` (number): For rented or part: the rent received for the whole home during the tax year, in euros, before expenses.
- `rented_days` (integer): For occupancy part: the number of days the home was let during the tax year.
- `residence` (string, required): 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.
- `revised` (string): 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.
- `shares_percent` (array): Each owner's share of the home in percent, when the shares differ (e.g. [60, 40]); they add up to 100. Replaces owners.
- `tax_year` (integer): Tax year (the year the income relates to). Default: the latest year whose rules are final.

### `modelo_210_deadlines` (~216 tokens)

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).

Input parameters:

- `language` (string): Language of the CasitaTax pages linked in the answer: da, de, en, es, fr, nl, no, fi or sv. Default en.
- `sale_date` (string): For sold: the day of the sale (the deed), YYYY-MM-DD. Without it, the rule is given without dates.
- `situation` (string, required): 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.

### `town_cadastral_data` (~283 tokens)

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.

Input parameters:

- `ine` (string): The town's 5-digit INE code, instead of town and province (e.g. 29069 for Marbella).
- `language` (string): Language of the CasitaTax pages linked in the answer: da, de, en, es, fr, nl, no, fi or sv. Default en.
- `province` (string): The town's province (e.g. Málaga, Alicante, Illes Balears, Santa Cruz de Tenerife), or its 2-digit code. Needed with town.
- `tax_year` (integer): Tax year (the year the income relates to). Default: the latest year whose rules are final.
- `town` (string): 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.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/com-casitatax-modelo-210/casitatax#diagnostics

## Score history

- 2026-11-05: 71
- 2026-11-04: 70
- 2026-11-03: 70
- 2026-11-02: 69
- 2026-11-01: 69
- 2026-10-31: 68
- 2026-10-30: 68

## Common questions

### What is the CasitaTax MCP server?

CasitaTax is an MCP server listed in the public MCP registry as com.casitatax/modelo-210. Spanish non-resident tax on a home in Spain: Modelo 210 estimate, deadlines, town cadastral data. This page covers its hosted endpoint (https://casitatax.com/mcp).

### Is the CasitaTax MCP server safe to use?

CasitaTax scores 71 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the CasitaTax MCP server expose?

CasitaTax exposes 3 tools: estimate_modelo_210, modelo_210_deadlines, town_cadastral_data. Their descriptions and schemas cost roughly 994 tokens of context every time the server is loaded.

### Does the CasitaTax MCP server require authentication?

No. We connected to CasitaTax without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the CasitaTax MCP server still maintained?

CasitaTax is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://casitatax.com/mcp
- Website: https://casitatax.com/en/ai-assistants/
- Changelog RSS feed: https://verifymcp.io/servers/com-casitatax-modelo-210/casitatax.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-casitatax-modelo-210/casitatax.json
- HTML version of this page: https://verifymcp.io/servers/com-casitatax-modelo-210/casitatax