wafergraph-mcp

A remote MCP server exposing wafergraph.com's semiconductor & AI supply-chain dataset — 565 companies across 12 segments, the supplier/customer graph, and a 74-deal M&A corpus — as five read-only tools any MCP-speaking AI agent can call directly.

No auth, no cost, read-only. Streamable HTTP transport at /mcp. Human landing page at /.

Live: https://wafergraph-mcp.jwpalm99.workers.dev

Tools

Tool	Purpose
search_companies({query?, segment?, country?})	Name/description search with segment & country filters. Compact list, capped at 25, with a total match count.
get_company({id})	Full allowed profile for one company (by id or name) plus its supplier/customer edges.
get_segments()	The 12-segment taxonomy (+ subsegments, market_position enum) with live company counts.
get_supply_chain({id, direction, depth})	Walk the supplier/customer graph from a focal company up to 2 tiers up ("up"), down ("down"), or "both".
get_deals({query?, segment?})	Search the M&A deal corpus. Compact list, capped at 30, with a total match count.

Every response includes:

• data — the payload.
• attribution — compiled-by/sources block (SEC, Wikidata, Wikipedia, GLEIF) plus a company_url back to the full sourced profile on wafergraph.com.
• links — { report, newsletter } pointing back to wafergraph.com and its $99 report.

Field discipline

Company records include key_products as of 2026-07-19. That field in wafergraph's own dataset was originally bulk-drafted with a known fabrication/mis-scope history and was withheld here until a verified deep-fill landed upstream; it now has (confirmed live) 564/565 companies filled, with only sk_enpulse empty (defunct, absorbed into SKC 2025-12-23). Every field shipped here — name, ticker, market_cap_usd_b, segments, one_liner, market_position, key_products, key_customers/key_suppliers graph edges, deals — is established, trust-checked data. Fields are still whitelisted (not blacklisted) in src/types.ts (toAllowedCompany), so anything added upstream later stays excluded by default until deliberately added.

Install

Claude Code

claude mcp add --transport http wafergraph https://wafergraph-mcp.jwpalm99.workers.dev/mcp

claude.ai (custom connector)

Settings → Connectors → Add custom connector → paste:

https://wafergraph-mcp.jwpalm99.workers.dev/mcp

Generic MCP client (Streamable HTTP)

{
  "mcpServers": {
    "wafergraph": {
      "url": "https://wafergraph-mcp.jwpalm99.workers.dev/mcp"
    }
  }
}

Architecture

Cloudflare Worker, TypeScript, built on the agents package's McpAgent (Durable-Object-backed Streamable HTTP MCP server — free on the Workers Free plan; SQLite storage backend). See CLAUDE.md for the file map and the data-source-mode decision (hybrid live-fetch + one vendored snapshot, discovered by E2E-testing the upstream endpoints rather than assumed).

Development

npm install
npm run dev       # wrangler dev, local
npm run typecheck # tsc --noEmit
npm run deploy    # wrangler deploy

Attribution & licensing

See ATTRIBUTION.md for the full source/license breakdown (SEC EDGAR public domain, Wikidata CC0, Wikipedia CC BY-SA 4.0 — attribution required, GLEIF). Short version: free to use, credit wafergraph.com, not financial advice.

This is an independent project built against wafergraph.com's public dataset; it is not an official wafergraph product.