MCP NAICS/SIC Server

A Model Context Protocol (MCP) server for looking up NAICS 2022 and SIC industry codes with keyword search, sector browsing, and NAICS-to-SIC crosswalk mapping.

Tools (4 total)

| Tool | Description | |------|-------------| | naics_lookup | Look up a NAICS code with title, hierarchy, children, and SIC crosswalk | | naics_search | Search NAICS codes by keyword (e.g., "software", "restaurant") | | sic_lookup | Look up a SIC code with title, hierarchy, children, and NAICS crosswalk | | sic_search | Search SIC codes by keyword |

Install

npx @easysolutions906/naics-api

Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "naics": {
      "command": "npx",
      "args": ["-y", "@easysolutions906/naics-api"]
    }
  }
}

Cursor

Add to .cursor/mcp.json:

{
  "mcpServers": {
    "naics": {
      "command": "npx",
      "args": ["-y", "@easysolutions906/naics-api"]
    }
  }
}

REST API

Set PORT env var to run as an HTTP server.

• GET /lookup?code=541511 -- look up a NAICS code
• GET /search?q=software -- search NAICS codes by keyword
• GET /sector/:code -- list all codes in a NAICS sector
• GET /sic/lookup?code=7372 -- look up a SIC code
• GET /sic/search?q=software -- search SIC codes by keyword
• GET /crosswalk?naics=541511 -- NAICS to SIC crosswalk
• POST /lookup/batch -- batch lookup NAICS or SIC codes

Data Source

NAICS 2022 codes from the US Census Bureau. SIC 1987 codes from the Standard Industrial Classification system. NAICS is revised on a 5-year cycle (next: 2027). SIC has not been updated since 1987. Run npm run build-data to regenerate.

Transport

• stdio (default) -- for local use with Claude Desktop and Cursor
• HTTP -- set PORT env var to start in Streamable HTTP mode on /mcp