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Umarelli MCP server

Which MCP servers are Umarelli's own, from the official registry and from asking its own domain, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-11-02

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Whose server it is
  • Registry nameorg.umarelli/umarelliverified in the MCP registry

The registry name sits under umarelli.org. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-11-02
  • Stateanswerschecked 2026-11-02
  • Tools3
  • Server calls itselfumarelli
  • Server version1.0.0
  • Protocol version2025-06-18

On 2026-11-02 the server answered initialize and tools/list without a sign-in. First answer in 270 ms.

Should an agent connect itNot proven either way yet
  • Whether its tools do the product's job has not been judged yet.
  • Checked on 3 of the 7 days it takes to judge reliability.

Once connected

  • Parameters are untyped or undescribed in 1 of 3 tools: check arguments before calling.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 3, the first on 2026-11-02
  • INITE MCP scoreafter a weeka score needs 7 daily checks: 3 so far
  • Answeredmeasuring3 of the 7 daily checks it takes to print a share
  • Median first answer514 ms
  • Space in an agent's context≈ 351 tokensthe definitions of all its tools (3), which an agent carries on every turn
  • Tool definitionsA · 94 of 100
  • Typed results0 of 3 toolsdeclared outputSchema: results come typed, read once
  • Parameters without a description: in 1 of 3

What an agent can do with it

  • not sure · Look up building permits filed for a specific lot
  • not sure · Check a property's tax assessment and market value
  • not sure · Review zoning capacity and land use applications

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

Worth a look

None of the five warning signs in these definitions.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers3 tools · read 2026-11-02
  • search

    Find buildings in New York City or Jersey City by street address. Returns ids, names and Umarelli page URLs; pass an id to fetch for the full record. New York City is assumed; include "Jersey City" to search there.

  • fetch

    Get one building’s record from Umarelli: building permits, assessed value and property tax bill, tax breaks, zoning, and news coverage. The id is a New York City BBL (ten digits), a Jersey City id such as jc:14106:39, or an Umarelli…

  • recent_permits

    List new-building and major-renovation permits near a street address in New York City (dated by filing) or Jersey City (dated by issue), newest first, each with a link to its building on Umarelli.

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "umarelli": {
      "type": "http",
      "url": "https://umarelli.org/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http umarelli https://umarelli.org/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://umarelli.org/mcp as a custom connector in the settings.

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.