SIC Codes UK
- jackmmaher/siccodes.co.uk
SIC Codes UK is an MCP server that looks up UK SIC codes, maps GICS/ICB sectors, and searches Companies House via agent tools.
About
SIC Codes UK is an MCP server that exposes UK industry classification and corporate registry search to coding agents. developers researching B2B opportunities, local services, or regulated sectors can ask an agent to resolve SIC codes, translate them into investor-familiar GICS/ICB taxonomies, and pull Companies House matches without leaving the editor. It suits founders validating whether a vertical is crowded, drafting investor one-pagers, or scoping ICP lists for outbound. The server publishes a hosted streamable-http remote and an npm stdio transport for Claude Code, Cursor, and similar clients. It is factual reference data, not lead enrichment or CRM sync—pair it with your own spreadsheets or outreach stack after you export findings.
- 731 UK SIC codes with lookup and cross-reference tooling
- GICS and ICB mapping from SIC classifications
- Companies House search across a 5.6M-company corpus
- Remote streamable-http endpoint at siccodes.co.uk plus npm stdio package sic-codes-mcp
- Version 3.0.0 MCP registry entry with GitHub source in mcp-server subfolder
SIC Codes UK by the numbers
- Data as of Jul 7, 2026 (Skillselion catalog sync)
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| Package | sic-codes-mcp |
|---|---|
| Transport | STDIO, HTTP |
| Auth | None |
| Repository | jackmmaher/siccodes.co.uk ↗ |
What it does
Look up UK Standard Industrial Classification codes, map to GICS/ICB, and search Companies House when sizing markets or profiling competitors.
Who is it for?
UK-focused developers doing niche research, B2B positioning, or competitor mapping before they write a landing page.
Skip if: Skip if you're outside the UK and need NAICS-only or non-UK registry data without crosswalk support.
What you get
Your agent returns aligned SIC/GICS/ICB labels and Companies House candidates you can paste into validation docs or competitor tables.
- Resolved UK SIC codes with GICS/ICB crosswalk
- Companies House search results for a classification or query
By the numbers
- 731 UK SIC codes indexed
- 5.6 million Companies House companies searchable
- MCP server version 3.0.0 with streamable-http and stdio transports
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FAQ
Who is SIC Codes UK for?
and developers validating UK markets who want SIC, GICS/ICB, and Companies House answers inside Claude Code, Cursor, or Codex.
When should I use SIC Codes UK?
Use it during Idea-phase research when you need industry codes, sector mapping, or company lists before scoping a product or pitch.
How do I add SIC Codes UK to my agent?
Register the remote https://siccodes.co.uk/api/mcp or run the npm package sic-codes-mcp over stdio per your client’s MCP config.