SME Library MCP

A free, open-source MCP server for creating, searching, and sharing Subject Matter Expert profiles that AI agents can consult. Anyone can connect their agent, pull vetted experts from the shared library, maintain private experts in their own workspace, and contribute good ones back through a moderated promotion pipeline — or self-host the entire stack.

Licensed under the MIT License. Contributions welcome via issues and pull requests.

Runs on Vercel (Next.js + Streamable HTTP transport) with a Supabase backend. New here? Read the User Guide — how it all works plus a complete reference for every SME field and its value ranges (also served in-app at /guide). See ARCHITECTURE.md for the full design and roadmap, and docs/SME_MCP_Implementation_Checklist.pdf for the step-by-step deployment runbook (regenerable from docs/implementation-checklist.html).

Tools

Related MCP server: HiveMind

Setup

1. Supabase

Create a project, then apply the migration:

supabase link --project-ref <ref>
supabase db push                    # applies supabase/migrations/*.sql
supabase functions deploy embed     # optional: enables semantic/hybrid search

The embed edge function runs the built-in gte-small model. It's optional — without it, search falls back to keyword FTS automatically.

2. Get an API key

Self-service (recommended): visit /dashboard, create an account (Supabase Auth), and mint a key. First login auto-creates your workspace. Requires SUPABASE_ANON_KEY to be set and email auth enabled in the Supabase project.

Operator / CLI: for admin keys or scripted provisioning:

SUPABASE_URL=... SUPABASE_SERVICE_ROLE_KEY=... \
  node scripts/create-key.mjs --workspace "My Team"            # read,write key
  node scripts/create-key.mjs --workspace "Ops" --admin        # admin key

Either way the plaintext key (sme_live_...) is shown once; only its SHA-256 hash is stored.

3. Deploy to Vercel

vercel deploy

Set env vars in the Vercel project: SUPABASE_URL, SUPABASE_SERVICE_ROLE_KEY, SUPABASE_ANON_KEY (powers the dashboard), ANTHROPIC_API_KEY, and CRON_SECRET (protects the daily /api/cron/maintenance job that recomputes quality scores, prunes rate-limit windows, and backfills embeddings). Also set NEXT_PUBLIC_BASE_URL to your canonical site URL and ADMIN_EMAILS (comma-separated) to bootstrap admin access.

3b. Email (confirmations & password resets)

Auth emails are sent by Supabase, not this app. If new accounts don't receive validation emails, it's a Supabase config issue — most often that custom SMTP isn't configured (the built-in sender is rate-limited to a few per hour, for testing only). In the Supabase dashboard: configure Authentication → Emails → SMTP Settings (Resend/Postmark/SendGrid/SES), enable Confirm email under Providers → Email, and add your site + …/auth/callback to the URL Configuration allow-list.

4. Connect a client

claude mcp add --transport http sme-library \
  https://<deployment>/api/mcp \
  --header "Authorization: Bearer sme_live_..."

Works with Claude Code, claude.ai custom connectors, and any Streamable-HTTP MCP client.

Local development

cp .env.example .env      # fill in Supabase + Anthropic
npm install
npm run dev               # HTTP server on :3000 (endpoint: /api/mcp)
SME_API_KEY=sme_live_... npm run stdio   # or stdio transport for local clients

Security model

• API keys are hashed at rest (SHA-256) and passed only in the Authorization header — the credential never appears in tool arguments or the model's context.

• Every key maps to one workspace with scopes (read, write, promote, admin) and a rate-limit tier; per-key fixed-window limits are enforced in Postgres.

• Supabase RLS is enabled deny-all on every table as defense-in-depth; only the server's service-role client can read or write.

• All writes land in audit_log.