How-to · Lesson 5 of 19
External MCP Servers: Bring Your Own Tools
The platform tools cover the common cases, but your business runs on more. If a system already has an MCP server, paste one HTTPS URL, add the headers it expects, and MagOneAI discovers its tools for you.
What You Will Learn
- Platform tools versus external tools, and where each appears on the MCP Tools page
- Adding an external MCP server with a name and an HTTPS URL
- Credential headers: passing the authentication the server expects, stored in the vault and not in the workflow
- Connect and Discover: how the server's tools are found automatically
- Why only an organization owner can add a server, and how it then becomes available to that organization's projects
- The guardrails: HTTPS only, publicly reachable servers only, one connection per URL
- Testing a discovered tool before it goes anywhere near a workflow, and reading the Online and Offline badges