Build a desktop extension with MCPB changedconnectors/building/mcpb
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99For a directory listing, build a remote MCP server, which reaches people on every surface, or include the local server in a plugin, as [Decide what to include in your plugin](/docs/connectors/building/what-to-build) explains.
1010
11<Note>
12 * If you're building a remote server, see [Build an MCP server for Claude](/docs/connectors/building/index)
13 * If you're deploying desktop extensions across a Team or Enterprise organization, see [Install a local connector in the desktop app](/docs/connectors/custom/add-unlisted#install-a-local-connector-in-the-desktop-app)
14</Note>
11> [!NOTE]
12>
13> * If you're building a remote server, see [Build an MCP server for Claude](/docs/connectors/building/index)
14> * If you're deploying desktop extensions across a Team or Enterprise organization, see [Install a local connector in the desktop app](/docs/connectors/custom/add-unlisted#install-a-local-connector-in-the-desktop-app)
1515
1616## Decide when to build an MCPB
1717
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6767
6868The MCPB CLI generates the manifest and packs the bundle.
6969
70<Steps>
71 <Step title="Install the MCPB CLI">
72 ```bash theme={null}
73 npm install -g @anthropic-ai/mcpb
74 ```
75 </Step>
70**1. Install the MCPB CLI**
7671
77 <Step title="Create your MCP server">
78 Build a stdio MCP server using the [MCP SDK](https://www.npmjs.com/package/@modelcontextprotocol/sdk).
79 </Step>
72```bash theme={null}
73npm install -g @anthropic-ai/mcpb
74```
8075
81 <Step title="Generate the manifest">
82 ```bash theme={null}
83 mcpb init
84 ```
85 </Step>
76**2. Create your MCP server**
8677
87 <Step title="Bundle">
88 ```bash theme={null}
89 mcpb pack
90 ```
91 </Step>
78Build a stdio MCP server using the [MCP SDK](https://www.npmjs.com/package/@modelcontextprotocol/sdk).
9279
93 <Step title="Install and test in Claude Desktop">
94 Double-click the generated `.mcpb` file.
95 </Step>
96</Steps>
80**3. Generate the manifest**
9781
82```bash theme={null}
83mcpb init
84```
85
86**4. Bundle**
87
88```bash theme={null}
89mcpb pack
90```
91
92**5. Install and test in Claude Desktop**
93
94Double-click the generated `.mcpb` file.
95
9896For detailed implementation guidance, see the [MCPB repository](https://github.com/modelcontextprotocol/mcpb), the [examples directory](https://github.com/modelcontextprotocol/mcpb/tree/main/examples) including a Hello World, and the [README "For Bundle Developers" section](https://github.com/modelcontextprotocol/mcpb/blob/main/README.md).
9997
100<Warning>
101 Before distributing your MCPB, review the testing and best-practices guidance in the MCPB README to ensure quality.
102</Warning>
98> [!WARNING]
99>
100> Before distributing your MCPB, review the testing and best-practices guidance in the MCPB README to ensure quality.
103101
104102## Configure manifest.json
105103
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