You can add external tools to opencode using the Model Context Protocol, or MCP. opencode supports both:

Local servers
And remote servers

Once added, MCP tools are automatically available to the LLM alongside built-in tools.

Configure

You can define MCP servers in your opencode config under mcp.

Local

Add local MCP servers using "type": "local" within the MCP object. Multiple MCP servers can be added. The key string for each server can be any arbitrary name.

opencode.json

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "my-local-mcp-server": {
      "type": "local",
      "command": ["bun", "x", "my-mcp-command"],
      "enabled": true,
      "environment": {
        "MY_ENV_VAR": "my_env_var_value"
      }
    },
    "my-different-local-mcp-server": {
      "type": "local",
      "command": ["bun", "x", "my-other-mcp-command"],
      "enabled": true
    }
  }
}

You can also disable a server by setting enabled to false. This is useful if you want to temporarily disable a server without removing it from your config.

Remote

Add remote MCP servers under mcp with "type": "remote".

opencode.json

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "my-remote-mcp": {
      "type": "remote",
      "url": "https://my-mcp-server.com",
      "enabled": true,
      "headers": {
        "Authorization": "Bearer MY_API_KEY"
      }
    }
  }
}

Local and remote servers can be used together within the same mcp config object.

opencode.json

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "my-local-mcp-server": {
      "type": "local",
      "command": ["bun", "x", "my-mcp-command"],
      "enabled": true,
      "environment": {
        "MY_ENV_VAR": "my_env_var_value"
      }
    },
    "my-remote-mcp": {
      "type": "remote",
      "url": "https://my-mcp-server.com",
      "enabled": true,
      "headers": {
        "Authorization": "Bearer MY_API_KEY"
      }
    }
  }
}

MCP servers

Configure

Local

Remote

Documentation

On this page