---
title: Publishing Remote Servers
sidebarTitle: Remote Servers
---

The MCP Registry supports remote MCP servers via the `remotes` property in `server.json`:

```json server.json highlight={7-12}
{
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-10-17/server.schema.json",
  "name": "com.example/acme-analytics",
  "title": "ACME Analytics",
  "description": "Real-time business intelligence and reporting platform",
  "version": "2.0.0",
  "remotes": [
    {
      "type": "streamable-http",
      "url": "https://analytics.example.com/mcp"
    }
  ]
}
```

A remote server **MUST** be publicly accessible at its specified URL.

## Transport Type

Remote servers can use the Streamable HTTP transport (recommended) or the SSE transport. Remote servers can also support both transports simultaneously at different URLs.

Specify the transport by setting the `type` property of the `remotes` entry to either `"streamable-http"` or `"sse"`:

```json server.json highlight={9,13}
{
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-10-17/server.schema.json",
  "name": "com.example/acme-analytics",
  "title": "ACME Analytics",
  "description": "Real-time business intelligence and reporting platform",
  "version": "2.0.0",
  "remotes": [
    {
      "type": "streamable-http",
      "url": "https://analytics.example.com/mcp"
    },
    {
      "type": "sse",
      "url": "https://analytics.example.com/sse"
    }
  ]
}
```

## HTTP Headers

MCP clients can be instructed to send specific HTTP headers by adding the `headers` property to the `remotes` entry:

```json server.json highlight={11-18}
{
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-10-17/server.schema.json",
  "name": "com.example/acme-analytics",
  "title": "ACME Analytics",
  "description": "Real-time business intelligence and reporting platform",
  "version": "2.0.0",
  "remotes": [
    {
      "type": "streamable-http",
      "url": "https://analytics.example.com/mcp",
      "headers": [
        {
          "name": "X-API-Key",
          "description": "API key for authentication",
          "isRequired": true,
          "isSecret": true
        }
      ]
    }
  ]
}
```

## Supporting Remote and Non-remote Installation

The `remotes` property can coexist with the `packages` property in `server.json` in order to allow MCP host applications to choose the preferred method of installation.

```json server.json highlight={7-22}
{
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-10-17/server.schema.json",
  "name": "io.github.username/email-integration-mcp",
  "title": "Email Integration",
  "description": "Send emails and manage email accounts",
  "version": "1.0.0",
  "remotes": [
    {
      "type": "streamable-http",
      "url": "https://email.example.com/mcp"
    }
  ],
  "packages": [
    {
      "registryType": "npm",
      "identifier": "@username/email-integration-mcp",
      "version": "1.0.0",
      "transport": {
        "type": "stdio"
      }
    }
  ]
}
```