Skip to main content

The #1 agentic semantic tool search: 91.6% first-try accuracy on S1 Search Bench • Explore Tool Discovery →

MCP Gateway

MCP Gateway
for Claude Code

One MCP gateway to connect Claude Code to 310+ enterprise SaaS apps. No auth hassle. Token-efficient by design. Security and governance built-in.

Start Free Setup guide →
DrataGPLocalyzeFlipMindtoolsScreenloop

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 Claude Code, Claude Desktop, Cursor, or Goose through one URL.

Connect Claude Code
To All Your Apps via One MCP

Simplify your Claude Code MCP server setup
with the StackOne MCP gateway.

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 Claude Code'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 Defense

¹ Jayavibhav test, 65,000 samples.

Connect Claude Code
In 4 Steps

From auth config to first agent tool call in 5 minutes.

1

Run claude mcp add to install StackOne.

One CLI command. Available in your next Claude Code session.

Terminal 
$ claude mcp add stackone \
    --transport http \
    "https://api.stackone.com/mcp/{...}"

✓ Added MCP server "stackone"
✓ 310+ tools available next session
View setup guide (opens in new tab)
2

Connect each SaaS integration in StackOne.

OAuth or API key per app, done once in your dashboard. Tokens stay server-side.

salesforce
workday
hubspot
slack
zendesk
Browse all connectors
3

Scope agent actions.

Read-only, specific objects, or per-role exposure. Toggle from the StackOne dashboard.

Query events (enabled)
Get insight (enabled)
Read funnel (enabled)
Update dashboard (disabled)
Delete data (disabled)
Agent Auth
4

Ask Claude in plain English.

StackOne maps your prompt to the right action in the right system. Done.

"Pull this week's PostHog drop-off funnel and post analysis to #growth on Slack."

Claude
posthog_query
Completed
slack_send_message
Completed
channel: #growth
message: Trial-to-paid down 12% this week. Likely cause: pricing page change Tuesday.

Found a 12% trial-to-paid drop this week and posted analysis to #growth in Slack.

Anthropic Haiku 4.5

Unlock More Use Cases
with Claude Code

Supercharge Claude with your enterprise stack.

HR & People Ops

> Pull this week's Rippling new hires and surface their onboarding gaps in Notion.

UKG ReadyWorkday (Rest and Soap)FactorialHiBobOracle Fusion HCMHumaansSAP SuccessFactorsClockify
Recruiting

> Summarize Lever pipeline velocity by stage and flag bottlenecks.

JobAdderVincereSmartRecruitersAshbyFactorialHiBobSAP SuccessFactorsTeamtailor
Sales & CRM

> Forecast this quarter's pipeline from Microsoft Dynamics 365 and surface top expansion deals.

SalesforceZoho CRMPipedriveFreshsalesHubSpotPardotCloseJustCall
Support

> Tag Freshdesk tickets by customer ARR tier and prioritize the top 5.

IntercomSurveyMonkeyFreshserviceServiceNowFreshdeskGorgiasDiscourseDixa
Explore more AI agent use cases

Connect any Desktop AI Agent
to the StackOne MCP Gateway

Same 310+ MCP servers. Pick your client.

Claude Desktop
Cursor
Goose

Frequently Asked Questions

Connecting Claude Code to the StackOne MCP gateway is one CLI command: claude mcp add stackone --transport http "<your-gateway-url>". The gateway URL embeds your account ID and token as query parameters. Available in your next session and 310+ pre-built SaaS connectors are reachable through that single connection. Full walkthrough in the Claude Code setup guide.
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.
Claude Code 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.
You'd connect Claude Code to one MCP server per app — each with its own setup, its own auth flow, and its own tool definitions sitting in your context. StackOne replaces those N connections with one gateway URL: 310+ apps reachable through a single connection, 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 Claude Code stores after claude mcp add), 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:
  • An existing first-party or third-party MCP server covers your apps, no tool extension needed
  • 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 Claude Code.

One MCP gateway, 310+ pre-built SaaS connectors. Set up in 5 minutes.

Start Free Book Demo