SIC Codes MCP Server

An MCP (Model Context Protocol) server that provides AI agents with access to UK SIC code classification data, GICS/ICB cross-mappings, and Companies House company search. Free to use, no API key required.

Source: siccodes.co.uk

What's included

| Data | Coverage | |------|----------| | UK SIC 2007 | 1,732 entries across 21 sections, 88 divisions, 274 groups, 618 classes, 731 subclasses | | GICS (MSCI) | 273 entries: 11 sectors, 25 industry groups, 74 industries, 163 sub-industries | | ICB (FTSE Russell) | 249 entries: 11 industries, 20 supersectors, 45 sectors, 173 subsectors | | Cross-classification mapping | 1,235 rows mapping SIC ↔ GICS ↔ ICB with confidence levels | | UK Companies | 5.6 million Companies House records searchable by industry |

Tools

lookup_sic_code

Look up any SIC, GICS, or ICB code. Returns name, hierarchy, children, and cross-classification mappings.

search_sic_codes

Search for SIC codes by business activity description in plain English. Returns ranked results with relevance scores.

convert_between_classifications

Convert a code between SIC, GICS, and ICB systems. Returns equivalent codes with confidence levels.

browse_classification_hierarchy

Browse the hierarchy tree of any classification system. Navigate from sections down to individual codes.

lookup_uk_company

Look up a UK company by name or Companies House registration number. Returns SIC codes, status, address, and classification mappings.

search_uk_companies_by_industry

Find UK companies by SIC, GICS, or ICB code. Filter by status. Useful for market research and competitor analysis.

Installation

Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "sic-codes": {
      "command": "npx",
      "args": ["-y", "sic-codes-mcp"]
    }
  }
}

Claude Code (CLI)

claude mcp add sic-codes -- npx -y sic-codes-mcp

Cursor / Windsurf

Add to your MCP settings:

{
  "sic-codes": {
    "command": "npx",
    "args": ["-y", "sic-codes-mcp"]
  }
}

Smithery

npx -y @smithery/cli install sic-codes-mcp --client claude

Examples

"What SIC code should I use for my online candle business?" → Agent calls search_sic_codes with query "online candle shop" → Returns 32990 (Other manufacturing n.e.c.) as primary, 47910 (Retail via internet) as secondary

"What does SIC code 62020 mean?" → Agent calls lookup_sic_code with code "62020", system "sic" → Returns full details: IT consultancy, hierarchy from Section J down, GICS/ICB mappings

"Convert SIC code 6202 to GICS" → Agent calls convert_between_classifications with code "6202", from "sic", to "gics" → Returns GICS sub-industry 45102030 (IT Consulting & Other Services), confidence: high

"Look up Tesco on Companies House" → Agent calls lookup_uk_company with query "Tesco" → Returns company details, SIC codes, registration info

Data sources

• SIC codes: UK SIC 2007 from Companies House
• GICS: March 2023 structure from MSCI (August 2024 methodology)
• ICB: v4.9 from FTSE Russell (December 2024)
• Cross-mapping: Canonical mapping generated by siccodes.co.uk with confidence scoring
• Company data: Companies House monthly snapshot via siccodes.co.uk API

License

MIT. SIC code definitions are Crown Copyright. Company data sourced from Companies House under Open Government Licence.