Connect
Optimize
Secure
MCP Gateway
MCP Gateway
for Notion AI Agents
One MCP gateway to connect Notion AI to 310+ enterprise SaaS apps. No auth hassle. Token-efficient by design. Security and governance built-in.
What is an MCP gateway?
An MCP gateway (also called an MCP aggregator) is a single endpoint that connects an AI agent to multiple
MCP servers via the open Model Context Protocol (opens in new tab).
Some gateways act as proxies, routing traffic to MCP servers customers operate themselves. Others provide the
underlying MCP servers as a managed service.
StackOne is the managed kind. We provide pre-built MCP servers for 310+ enterprise SaaS apps,
including ones with no official MCP server today. For each app you connect, StackOne provides the MCP protocol
layer, the SaaS API integration, action coverage, and the auth orchestration framework. Authentication is
configured per app per organization — your team registers OAuth credentials with the SaaS provider, links them
in StackOne, and end users then authorize access through that flow. Once set up, the agent reaches every
connected app through one URL, with token storage, refresh, and per-user scoping handled by StackOne.
StackOne's MCP gateway — SOC2, HIPAA, CCPA, and GDPR compliant — bundles 310+ pre-built SaaS integrations exposing 20,000+ actions, all reachable from your Notion AI Agent through one URL.
Act across all your apps
from inside Notion
One MCP gateway, every enterprise SaaS your Notion AI Agent
could ever need to act on.
Coverage
310+ connectors.
20,000+ tested actions.
Every action is built and maintained by StackOne, tested against the live API, and updated when vendors change their endpoints.
Browse all connectors
Trust
Auth & governance,
simplified.
StackOne handles OAuth, API keys, refresh, and scopes for every connector, giving enterprise IT full control through auth configs in a multi-tenant setup.
Agent Auth
Performance
Agent context window,
managed.
Tool Discovery and Code Mode keep the Notion AI Agent's context lean — only relevant actions, no raw response noise. Sharper agents, lower token costs.
Tools Discovery
Security
Agent security,
built in.
Defender scans every MCP tool response for prompt injection in real time. Up to 97.44%¹ detection, 0.2% false positives. SOC2, HIPAA, CCPA, GDPR compliant.
Prompt Injection Defense¹ Jayavibhav test, 65,000 samples.
Connect the Notion agent
to more apps in 4 steps
From auth config to first agent tool call in 5 minutes.
1
Add StackOne as a Custom MCP server in Notion AI.
Open Settings → Notion AI → AI connectors, enable Custom MCP servers, then paste the StackOne gateway URL. Available immediately to every AI Agent in your workspace.
Settings → Notion AI → AI connectors
Add Custom MCP server
Display name
StackOne
Server URL
https://api.stackone.com/mcp/{...}
Authentication
API Key
Save connection
2
Connect each SaaS integration in StackOne.
OAuth or API key per app, done once in your dashboard. Tokens stay server-side.
3
Scope agent actions.
Read-only, specific objects, or per-role exposure. Toggle from the StackOne dashboard.
List pages (enabled)
Get page (enabled)
Read database (enabled)
Update page (disabled)
Delete page (disabled)
4
Ask your Notion AI Agent in plain English.
StackOne maps your prompt to the right action in the right system. Done.
"Pull this week's Intercom feedback themes and link them to relevant Linear tickets in the product brief."
Notion intercom_list_conversations
Completed
linear_list_issues
Completed
filter: labels contain feedback themes
team: Product
result: 8 Linear tickets matched
Linked 18 Intercom feedback themes to 8 Linear tickets. Updated the Product Brief page.
Get your Notion agent
to do more across your stack
Cross-app workflows your Notion agent now runs in seconds instead of click-throughs.
Product & Engineering
> Pull this sprint's Linear tickets and update the project roadmap page.
CRM & Account Planning
> Pull Attio account context and prep this quarter's account-planning pages.
Customer & Support
> Cluster Intercom feedback themes from this week and update the customer-feedback wiki.
Revenue & Finance
> Pull this month's Stripe revenue activity and update the finance brief page.
Connect any Enterprise AI Agent
to the StackOne MCP Gateway
Same 310+ MCP servers. Same agent context. Pick yours.
Frequently Asked Questions
Notion AI Agents act across enterprise SaaS through StackOne's MCP gateway. Setup takes a few clicks: open Settings → Notion AI → AI connectors, enable Custom MCP servers, click Add connection → Custom MCP server, paste the StackOne gateway URL with your account ID and token, and save. Available immediately to every AI Agent in your workspace and 310+ pre-built SaaS connectors are reachable through that single connection. Full walkthrough in the Notion AI Agents docs. Requires a Notion Business or Enterprise workspace.
An MCP gateway (also called an MCP aggregator) is a single endpoint that connects an AI agent to multiple MCP servers via the Model Context Protocol. Some gateways route traffic to MCP servers customers operate themselves; others provide the MCP servers as a managed service. StackOne is the managed kind — we provide pre-built MCP servers for 310+ enterprise SaaS apps, including ones with no official MCP server today. Authentication is configured per app per organization: your team registers OAuth credentials with the SaaS provider, links them in StackOne, and end users authorize access through that flow. Once set up, the agent reaches every connected app through one URL.
Notion can access enterprise SaaS like Salesforce, Workday, HubSpot, Greenhouse, Zendesk, NetSuite, ServiceNow, Stripe, and Notion through the StackOne MCP gateway — 310+ pre-built connectors in total. New connectors ship continuously, and you can build custom ones with AI Integration Builder. See all connectors.
Notion AI Agents ship with a handful of first-party MCP partners (Linear, Attio, Stripe, HubSpot, Intercom, Ramp, GitHub, Amplitude, Sentry). StackOne adds the other 310+ — every app reachable through one Custom MCP connection instead of N separate ones, auth managed once in the dashboard, and tool definitions loaded only when relevant to the prompt.
Credentials sit at three layers: your StackOne API token (embedded in the gateway URL stored in your Notion workspace settings, controlled by workspace admins), SaaS connector credentials (server-side in your StackOne dashboard), and per-user OAuth or session tokens (server-side, scoped per user). StackOne stores OAuth tokens and API keys, refreshes them automatically, and only exposes the actions you've authorized to the agent.
Skip the StackOne MCP gateway when any of these is true:
- Notion's first-party MCP partners (Linear, Attio, Stripe, HubSpot, Intercom, Ramp, GitHub, Amplitude, Sentry) already cover your apps
- You only use a handful of actions across a few apps
- You don't need multi-tenancy, per-user permissions, or per-action scoping
- Indirect prompt injection isn't a concern
- Your MCP provider already does tool discovery and server-side execution to keep the agent context lean
Connect All Your Apps to Notion.
One MCP gateway, 310+ pre-built SaaS connectors. Set up in 5 minutes.