What Is the Difference Between Production, Staging, and Local in the Official MCP Registry?

Updated

The Official MCP Registry lets you point its interface at three different API environments: Production, Staging, and Local. The difference is which server the registry talks to. Production (registry.modelcontextprotocol.io) is the live registry you use for real lookups. Staging (staging.registry.modelcontextprotocol.io) is a pre-release environment for testing. Local (localhost:8080) targets a registry instance running on your own machine, for development. You pick one in the environment selector and confirm with Apply; the choice only changes which endpoint the page queries, not what the registry is.

The three environments at a glance

Environment API base URL What it is for
Production registry.modelcontextprotocol.io Live registry data; normal browsing and real queries
Staging staging.registry.modelcontextprotocol.io Pre-release testing and validation before changes reach Production
Local localhost:8080 A registry server running on your own machine, for development

A Custom option also appears alongside these, letting you enter a different base URL rather than choosing one of the three presets.

How to switch environments

  1. Open the environment selector in the registry interface.
  2. Choose Production, Staging, or Local (or Custom and enter a base URL).
  3. Select Apply to confirm.

The expected result is that subsequent requests — such as loading the server list — go to the endpoint you selected. If nothing changes after selecting an option, the usual cause is not applying it; the selection is only committed on Apply.

Which one should you use?

  • Use Production when you want the real, current registry contents — for example, browsing recently updated servers or pulling data you intend to rely on.
  • Use Staging when you are testing a change or checking behavior against a pre-release endpoint, and you do not want to depend on or disturb live data.
  • Use Local when you are developing against your own registry instance on port 8080, so your work is isolated from the hosted environments.

Practical notes

  • Switching environments changes the data source, so the same query can return different results in Production versus Staging.
  • Local only works if something is actually serving a registry on localhost:8080; otherwise requests will fail.
  • The registry also exposes a GitHub link and Docs / API Reference links for further detail on the API itself.