Why Fastn UCL Is Essential for Making MCP Work in Production?

MCP (Model Context Protocol) is a powerful standard that defines how AI agents describe and execute commands across tools. But MCP only defines the structure, not the infrastructure.

To build real-world AI-powered integrations at scale, especially across multiple tenants, users, and workspaces, you need more than a protocol. You need infrastructure that understands authentication, routing, context, observability, and more.

That’s where Fastn UCL comes in.

Why Gateway Vendors Fall Short?

Gateway vendors provide quick-start platforms with prebuilt connectors and simplified OAuth to help developers integrate third-party APIs faster e.g, Composio, Smithery, and Pipedream.

While great for prototyping, they aren't designed for production needs. These platforms often lack:

• True multi-tenant awareness

• Customizable routing per workspace or user

• Extensibility beyond basic triggers and actions

Without these features, teams are forced to write and maintain custom glue code, undoing the time savings these tools initially provide.

What Makes Fastn UCL Different?

Fastn UCL (Unified Command Layer) is a managed platform that turns MCP into a secure, scalable system ready for production. Rather than just simplifying OAuth or wrapping APIs, Fastn UCL gives you the foundational infrastructure that makes agentic actions across tools feasible in production:

• Full compatibility with MCP-formatted commands

• Secure, tenant-aware execution

• Built-in connector support (Slack, Notion, Jira, Gmail, etc.)

• Retry logic, logging, and monitoring

• Role-based access control and workspace management

• Real-time observability across tenants

This is how your AI agent looks with and without Fastn UCL embedding:

Without Fastn UCL embedding

With Fastn UCL embedding

Key Distinction

Most traditional gateway tools (e.g., Composio, Smithery, and Pipedream) do not support MCP and are not designed for AI agent architectures. They focus on event-driven workflows, not agent-executed structured actions.

What Makes Fastn UCL Unique

Fastn UCL is one of the only platforms built ground-up to support MCP in production, offering secure, multitenant-compatible infrastructure with native support for structured agent actions across different tools and tenants.

Embedding Your AI Agent with Fastn UCL

Once you’ve understood what sets Fastn UCL apart, here’s how you can embed it into your environment and bring your AI agent to life, backed by secure, scalable infrastructure:

Set Your Environment Variables

• Generate your OpenAI API key from platform.openai.com/api-keys.

  

  
  

• Add it to your .env file:

  
  

• From the Integrate section in Fastn UCL, copy your MCP server URL and paste it into .env:

  

  
  

• This server URL includes your Space ID and Tenant ID, tying your agent to the right workspace context.

Why This Matters

This isn’t just a code snippet, it’s the bridge between structured MCP commands and real-world execution. By embedding Fastn UCL:

• Your agent doesn’t just suggest tasks, it performs them securely.

• You inherit built-in multitenancy, routing, and connector logic without custom code.

• You go from prototype to production with real observability and access control.

With just a few config steps, your AI agent becomes fully operational, powered by Fastn’s UCL and ready to interact with the tools your users rely on every day.

Bringing It All Together

"MCP gives us the language for agent actions. Fastn UCL gives us the infrastructure to make them work in production."

With workspace-based multitenancy, built-in connectors, retries, and observability, Fastn UCL bridges the gap between prototype and production.

Next Step: Sign up at ucl.dev and deploy your first assistant today.