Twenty MCP

A remote MCP (Model Context Protocol) server that connects Claude to a Twenty CRM workspace, deployed on Cloudflare Workers with OAuth for one-click team install.

What it does

Exposes 9 generic, schema-driven tools that work on any Twenty object (Person, Company, Opportunity, or any custom object). The MCP introspects Twenty's metadata API at runtime — you never need to update the MCP when you add fields or objects.

Tools

• list_objects, describe_object — discover what's in the CRM

• find_records, get_record — query with filter/orderBy/pagination

• create_record, update_record, delete_record — mutations (only when connected in write mode)

• run_graphql — escape hatch for raw metadata/graphql

• get_primer — org-specific domain context + live schema snapshot

Resources (auto-loaded by Claude on session start)

• twenty://primer — organisation context merged with a compact schema snapshot

• twenty://api/info — connector status and current scopes

Related MCP server: twentycrm-graphql-mcp

Install (team member)

1. In Claude → Settings → Connectors → Add custom connector

2. URL: https://<your-worker>.workers.dev/mcp

3. Claude redirects you to a consent page where you'll need your personal Twenty API key. To get one:

   • Log into your Twenty workspace in the browser

   • Click the gear icon (bottom-left) → Settings

   • Go to Developers (under the Workspace section in the sidebar)

   • Click + Create API key, give it a name (e.g. "Claude MCP"), and copy the key

4. Paste the API key into the consent form. Choose permission (read-only or read+write) and optional object scopes.

5. Done. Your key is stored encrypted in Cloudflare KV, bound to your session.

Changes you make in Twenty are attributed to your Twenty user, not to a shared service account.

Deploy (admin, first time)

Prerequisites

• A Cloudflare account (free plan works)

• Node.js 18+

• A running Twenty CRM instance (self-hosted or cloud)

Steps

# 1. Clone the repo
git clone https://github.com/High-Impact-Athletes/hia-twenty-mcp.git
cd hia-twenty-mcp
npm install

# 2. Create the KV namespace
npx wrangler kv namespace create twenty-mcp-oauth
# Note the ID from the output (e.g. "3cd89a10677c4d2ba32c9e59482afa23")

# 3. Create your local config (not committed to git)
cp wrangler.jsonc wrangler.local.jsonc
# Edit wrangler.local.jsonc:
#   - Set "account_id" to your Cloudflare account ID
#   - Replace <OAUTH_KV_ID> with the KV namespace ID from step 2

# 4. Set secrets
npx wrangler secret put COOKIE_ENCRYPTION_KEY --config wrangler.local.jsonc
# Paste the output of: openssl rand -hex 32
# This is just a random string for encrypting OAuth cookies — not a Twenty secret.

npx wrangler secret put TWENTY_BASE_URL --config wrangler.local.jsonc
# Paste your Twenty instance URL, e.g. https://crm.example.com
# This is whatever URL you use to log into Twenty in your browser.

# 5. Deploy
npm run deploy

Your Worker URL will be https://hia-twenty-mcp.<your-subdomain>.workers.dev. Share <url>/mcp with the team.

For Claude managed teams: register <url>/mcp once in the Claude team admin console — it will appear in every team member's connector list. Each member still completes the one-time consent page to paste their own Twenty API key.

Optional: set an admin token

Enables the /admin/* endpoints for uploading org-specific primer context (see Customising the primer):

npx wrangler secret put ADMIN_TOKEN --config wrangler.local.jsonc
# Paste the output of: openssl rand -hex 32

Customising the primer

The twenty://primer resource gives Claude context about your CRM before any tool calls. It contains two parts:

1. Organisation context — a markdown doc describing your domain model, custom objects, business rules, and conventions. Things introspection can't capture (e.g. "Object A and Object B are independent — don't infer one from the other").

2. Schema snapshot — auto-generated from Twenty's metadata API, cached for 1 hour.

Out of the box, part (1) is a generic Twenty template. To upload your org-specific context:

# Upload your context markdown:
curl -X PUT https://<your-worker>.workers.dev/admin/primer \
  -H "Authorization: Bearer <your-admin-token>" \
  -H "Content-Type: text/markdown" \
  --data-binary @path/to/your-context.md

# Verify it's loaded:
curl https://<your-worker>.workers.dev/admin/primer \
  -H "Authorization: Bearer <your-admin-token>"

# Revert to the bundled default:
curl -X DELETE https://<your-worker>.workers.dev/admin/primer \
  -H "Authorization: Bearer <your-admin-token>"

The context markdown should describe: what your organisation does, what each custom object means and how they relate, classification models, naming conventions, and any "do this / don't do that" rules for AI. See src/primer/default-context.md for the template structure.

Local development

npm install
cp .dev.vars.example .dev.vars
# Edit .dev.vars — set COOKIE_ENCRYPTION_KEY, TWENTY_BASE_URL, and optionally ADMIN_TOKEN

# Make sure you have wrangler.local.jsonc set up (see Deploy section)
npm run dev            # wrangler dev on http://localhost:8787
npm run typecheck

To connect a local Claude Desktop to the dev worker, add http://localhost:8787/mcp as a connector.

How auth works

Twenty has no upstream OAuth provider — authentication is via per-workspace API keys. So:

• The Worker runs its own OAuth 2.1 endpoint (required by Claude connectors).

• During the OAuth consent step, the user pastes their Twenty API key into an HTML form.

• The Worker validates the key against Twenty's /metadata endpoint, then stores {twentyApiKey, mode, allowedObjects, label} as encrypted OAuth props.

• Every subsequent MCP tool call has the user's key available via this.props.

This means the MCP is OAuth on the outside (for Claude) and API key on the inside (for Twenty).

Scoping

Each connection can be narrowed at install time:

• Mode: read-only hides create_record / update_record / delete_record.

• Allowed objects: comma-separated list to restrict to specific objects.

Object-level permissions are also enforced by Twenty itself via the role attached to the user's API key — belt and braces.

Twenty version compatibility

Tested against Twenty v0.40+. The MCP uses:

• REST API (/rest/<objects>) for record CRUD — depth limited to 0 or 1

• GraphQL metadata API (/metadata) for schema introspection — uses the settings field on Field type for relation info

• Composite fields (e.g. name.firstName, emails.primaryEmail) must be dot-notated in filters

If you're on a significantly older Twenty version, the metadata query shape may differ. Open an issue if you hit errors.

Architecture

Claude ↔ OAuth 2.1 ↔ Worker ↔ REST+GraphQL ↔ Twenty workspace
                        │
                        ├─ McpAgent Durable Object (per session)
                        ├─ OAUTH_KV (token store, schema cache, primer)
                        └─ twenty://primer (org context + live schema)

License

Apache-2.0