forency-mcp
Click on "Deploy Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type
@followed by the MCP server name and your instructions, e.g., "@forency-mcpwhat technology stack does stripe.com use?"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
Forency — Website Technology Forensics
Detect the technology stack behind any website: CMS, ecommerce, JavaScript frameworks, analytics, CRM, marketing automation, payments, chat, CDN, and hosting. Built for AI agents first (MCP server), humans second (REST API + playground).
Live: forency.io
Docs: forency.io/docs
MCP server:
forency-mcpon npm
Why
BuiltWith's API starts at $295/mo, Wappalyzer's at $250/mo, and neither ships an MCP server. Forency covers the ~100 technologies that actually drive prospecting and competitive research, starts free, and tops out at $49/mo.
Related MCP server: techstack-detective-mcp
Stack
Layer | Choice |
App | Next.js 16 (App Router, TypeScript, Tailwind 4) on Vercel |
Detection | In-house engine over a curated fingerprint set derived from webappanalyzer (GPL-3.0) |
Database | Postgres (Neon) via Prisma 7 |
Auth | Auth.js v5 — GitHub + Google |
Billing | Stripe Checkout subscriptions + webhook |
MCP |
|
Layout
app/
page.tsx landing + free playground
pricing/ docs/ dashboard/
api/
v1/lookup POST {url} → metered, Bearer key
v1/batch POST {urls} → up to 25 URLs
scan playground (no key, 3/day per IP)
key issue/rotate a user's API key
stripe/ checkout · portal · webhook
auth/ Auth.js handlers
lib/
engine/ detect.ts · curated-list.ts · custom-patterns.ts · fingerprints.json
api-auth.ts key auth + atomic monthly metering
plans.ts keys.ts prisma.ts stripe.ts
packages/mcp/ the published MCP server
scripts/
build-fingerprints.ts regenerate fingerprints.json from upstream
eval-engine.ts detection accuracy harness (25 known sites)
test-funnel.ts end-to-end: key → free tier → 429 → upgrade
test-mcp.ts drives the MCP server over stdioLocal development
npm install
cp .env.example .env # fill in the values
# local Postgres
docker run -d --name forency-pg \
-e POSTGRES_USER=forency -e POSTGRES_PASSWORD=forency -e POSTGRES_DB=forency \
-p 5433:5432 postgres:16-alpine
npx prisma migrate dev
npm run devVerification
npx tsx scripts/eval-engine.ts # detection accuracy (25/25 expected)
npx tsx scripts/eval-engine.ts example.com # scan one site, full JSON
# with the dev server running:
npx tsx scripts/test-funnel.ts # billing funnel end to end
cd packages/mcp && npm run build && cd ../..
npx tsx scripts/test-mcp.ts # MCP server over stdioRefreshing detection
lib/engine/fingerprints.json is a vendored snapshot. To pull upstream changes or add technologies, edit lib/engine/curated-list.ts and run:
npx tsx scripts/build-fingerprints.tsThe script fails loudly if a curated name doesn't exist upstream and suggests near matches. Tier-1 technologies that upstream detects poorly get overlays in lib/engine/custom-patterns.ts.
License
Application code: MIT. Detection patterns derive from webappanalyzer (GPL-3.0) and are used server-side; they are not redistributed in the npm package.
This server cannot be deployed
Maintenance
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