Koskamo

Address to Census Tract MCP

An MCP server that resolves US street addresses or coordinates to census geographies including tract, block group, county FIPS, and legislative districts using the US Census Bureau Geocoder. It supports vintage selection for historical data and explains GEOID structures.

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.

Address to Census Tract MCP logo, by theluckystrikeCommunity listingStreamable HTTPNo sign-inEndpoint checked 2026-11-06Published by theluckystrike
You need:No key, no sign-up
MCP endpoint (Streamable HTTP)
https://address-to-census-tract-mcp.lipmichal.workers.dev/mcp
Vendor documentation

What its tools do

3 tools, grouped by the hints the server advertises. Hints are self-declared, not verified behavior.

Read-only (3)

3 of 3 have a description · 3 of 3 declare behavior hints · 3 of 3 with parameters document them all

Checks and signals

Each line is separate evidence, not a trust score.

  • Passed Endpoint answered the live check ·
  • Availability 1 of 1 checks passed in 30 days

What you can do with it

  • Resolve a US street address to its census tract and block group
  • Get congressional and state legislative districts for a latitude and longitude
  • Split a census GEOID into its constituent FIPS parts and tract number

Source and maintenance

Community listingRegistry 1.0.0
mcp-registry: io.github.theluckystrike/address-to-census-tract-mcp@1.0.0Source repository
Maintenance checked

Protocol and capabilities

Server
address-to-census-tract-mcp 1.0.0
MCP protocol negotiated in check
2025-11-25
Tools
3 advertised
Resources
Not advertised
Resource templates
Not advertised
Prompts
Not advertised
Server-advertised capabilities
{
  "tools": {
    "listChanged": true
  }
}

Server-provided instructions

Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.

Exact census geographies for a US address or point, read at call time from the US Census Bureau Geocoder (geocoding.geo.census.gov). A model cannot know which census tract an address falls in; tract boundaries follow streets and change with each census. Use get_census_tract_for_address for a street address.

Tools

3 advertised

get_census_tract_for_address — Get census tract for an address
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

Look up the census tract for a US street address with the official US Census Bureau Geocoder. Returns the matched address, latitude and longitude, the 11-digit tract GEOID and tract number, block group and block GEOIDs, state and county FIPS, incorporated place, county subdivision, congressional district, state senate and house districts, urban area and combined statistical area. Use it for CRA, LIHTC, opportunity zone, grant eligibility and demographic lookups that start from an address.

get_census_tract_for_address input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "address"
  ],
  "properties": {
    "address": {
      "type": "string",
      "maxLength": 200,
      "minLength": 5,
      "description": "One-line US address with house number, street, city and state or ZIP, for example \"1600 Pennsylvania Ave NW, Washington, DC 20500\"."
    },
    "vintage": {
      "enum": [
        "current",
        "census2020",
        "census2010",
        "acs2017",
        "acs2018",
        "acs2019",
        "acs2021",
        "acs2022",
        "acs2023",
        "acs2024",
        "acs2025",
        "acs2026"
      ],
      "type": "string",
      "description": "Census vintage. current (default) uses today's geographies; census2020 uses the 2020 Census geographies; acs2017 to acs2026 match an ACS release."
    }
  },
  "additionalProperties": false
}
get_census_tract_for_address annotations
{
  "title": "Census tract for address",
  "readOnlyHint": true,
  "openWorldHint": true,
  "idempotentHint": true,
  "destructiveHint": false
}
get_census_tract_for_coordinates — Get census tract for coordinates
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

Census tract, block group, block, county, place and congressional and state legislative districts for a latitude and longitude, from the US Census Bureau Geocoder.

get_census_tract_for_coordinates input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "latitude",
    "longitude"
  ],
  "properties": {
    "vintage": {
      "enum": [
        "current",
        "census2020",
        "census2010",
        "acs2017",
        "acs2018",
        "acs2019",
        "acs2021",
        "acs2022",
        "acs2023",
        "acs2024",
        "acs2025",
        "acs2026"
      ],
      "type": "string",
      "description": "Census vintage. current (default) uses today's geographies; census2020 uses the 2020 Census geographies; acs2017 to acs2026 match an ACS release."
    },
    "latitude": {
      "type": "number",
      "maximum": 90,
      "minimum": -90,
      "description": "Latitude, for example 41.8827."
    },
    "longitude": {
      "type": "number",
      "maximum": 180,
      "minimum": -180,
      "description": "Longitude, for example -87.6237."
    }
  },
  "additionalProperties": false
}
get_census_tract_for_coordinates annotations
{
  "title": "Census tract for coordinates",
  "readOnlyHint": true,
  "openWorldHint": true,
  "idempotentHint": true,
  "destructiveHint": false
}
explain_census_geoid — Explain a census GEOID
Advertised by the server during the last successful anonymous check.
Advertised read-only

Split a census GEOID (2 digits state, 5 county, 11 tract, 12 block group, 15 block, or with a 1400000US style prefix) into state and county FIPS, tract code, the tract number as Census displays it (012405 is 124.05), block group and block. No network call.

explain_census_geoid input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "geoid"
  ],
  "properties": {
    "geoid": {
      "type": "string",
      "maxLength": 24,
      "minLength": 2,
      "description": "GEOID, for example \"06075012405\" or \"1400000US06075012405\"."
    }
  },
  "additionalProperties": false
}
explain_census_geoid annotations
{
  "title": "Explain GEOID",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

90-day uptime

A lightweight connection check about every six hours, sampled on hosts with many listings. It shows the server answered, not that its tools work.

Too few checks for a percentage yet (1 of 1 answered).

  1. 2026-11-07: 1 of 1 checks answered

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
949 ms
95th percentile latency
949 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · probe · passed · 949 ms · metadata changed · 3 tool(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.
Claude Code configuration
claude mcp add --transport http address-to-census-tract-mcp https://address-to-census-tract-mcp.lipmichal.workers.dev/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).
Codex configuration
codex mcp add address-to-census-tract-mcp --url https://address-to-census-tract-mcp.lipmichal.workers.dev/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable address-to-census-tract-mcp in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "address-to-census-tract-mcp": {
      "url": "https://address-to-census-tract-mcp.lipmichal.workers.dev/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "address-to-census-tract-mcp": {
      "type": "streamableHttp",
      "url": "https://address-to-census-tract-mcp.lipmichal.workers.dev/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start address-to-census-tract-mcp and inspect its tools.
VS Code configuration
{
  "servers": {
    "address-to-census-tract-mcp": {
      "type": "http",
      "url": "https://address-to-census-tract-mcp.lipmichal.workers.dev/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.
Gemini CLI configuration
gemini mcp add --transport http address-to-census-tract-mcp https://address-to-census-tract-mcp.lipmichal.workers.dev/mcp

Claude Desktop

Open Claude Settings > Connectors > Add custom connector, enter this server URL and enable it for the conversation. This is a manual remote-connector handoff, not a desktop JSON configuration.
Claude Desktop configuration
https://address-to-census-tract-mcp.lipmichal.workers.dev/mcp

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.
Windsurf configuration
{
  "mcpServers": {
    "address-to-census-tract-mcp": {
      "serverUrl": "https://address-to-census-tract-mcp.lipmichal.workers.dev/mcp"
    }
  }
}

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