How to Build Multi-Tenant MCP Gateways Step-by-Step

#MCPGateway #DescopeTutorial #AIAgents #MultiTenant Try descope for free: https://descope.plug.dev/U0AQVPb Learn how to build a secure multi-tenant MCP gateway using Descope and Bifrost — tenant isolation, per-customer credential vaults, and zero crossover risk. In this step-by-step tutorial, I walk through the complete architecture for running a multi-tenant MCP gateway where every enterprise customer gets their own isolated credentials, permissions, and auth flow — without writing custom auth code for each one. The stack is Descope for identity and access control, and Bifrost as the enforcement gateway that routes each agent request to the right customer's credentials. If you're building a SaaS platform that exposes tools to AI agents, multi-tenant MCP is one of the first hard problems you'll hit. A standard OAuth setup doesn't tell your server which customer is calling — it just confirms they're authenticated. This tutorial shows the architecture that actually solves it: a credential vault per tenant, permissions baked into the token at issuance, and a gateway that enforces all of it with zero application code in the middle. By the end, you'll have a working multi-tenant MCP gateway with two isolated tenants (Acme Corp and Globex Industry) accessing three backend services — GitHub, Stack Overflow, and a weather API — through the same gateway, with a full audit trail proving zero credential crossover. TIMESTAMPS: 0:00 - Multi-Tenant MCP: The Enterprise Security Problem 1:00 - Three Approaches Teams Try (and Where They Break) 2:30 - Architecture: Four Building Blocks 3:40 - Demo Scenario: Two Customers, Three Services 4:00 - Build Overview: 5 Steps 4:15 - Step 1: Register MCP Server in Descope 5:30 - Step 2: Set Up Credential Vault (Connections) 5:45 - Step 3: Configure the Sign-in Flow 6:30 - Step 4: Permissions and Roles 7:15 - Step 5: Bifrost Gateway Configuration 8:00 - Isolation Proof: Testing Tenant Separation 10:30 - Scaling to N Tenants with the Management API 11:00 - Recap Resources: Descope MCP Gateways docs: https://docs.descope.com/mcp/gateways Descope Agentic Identity Hub: https://docs.descope.com/agentic-identity-hub Bifrost (open-source AI gateway): https://github.com/maximhq/bifrost 📧 FREE Weekly AI Automation Newsletter: Get weekly tutorials, free workflow templates, and the latest AI news straight to your inbox 👉 https://aifornoncoders.com/newsletter 🤝 Join the AI Automation Engineering Community: Go deeper — interact with me and the community, get feedback on your builds, and stay ahead of the curve 👉 https://www.skool.com/ai-automation-engineering-3014