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devlimelabs

MCP Environment & Installation Manager

by devlimelabs

install-mcp

Install MCP server packages to extend functionality, specifying package names and optional versions for automated setup.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
packageNameYesPackage name to install
versionNoSpecific version to install

Implementation Reference

  • The MCP tool handler for 'install-mcp', registered inline with server.tool(). Validates input, calls PackageManager.installPackage(), handles errors, and returns structured success/error response.
    server.tool( "install-mcp", { packageName: z.string().describe("Package name to install"), version: z.string().optional().describe("Specific version to install") }, async ({ packageName, version }, extra) => { if (!packageName.trim()) { throw new Error("Package name cannot be empty"); } const result = await packageManager.installPackage(packageName, version); if (!result.success) { throw new Error(`Failed to install package: ${result.error}`); } return { content: [ { type: "text", text: JSON.stringify({ success: true, packageName: result.packageName, version: result.version, localPath: result.localPath }, null, 2) } ] }; } );
  • src/server.ts:33-33 (registration)
    Top-level call to register installation tools including 'install-mcp' on the MCP server instance.
    registerInstallationTools(server, configService, packageManager);
  • Core implementation of package installation in PackageManager class: creates directory, sets up package.json, executes npm/yarn/pnpm install, discovers version/bin path, updates registry, handles errors.
    async installPackage(packageName: string, version?: string): Promise<InstallResult> { try { // Create package-specific directory const packageDir = path.join(this.packagesDir, packageName.replace('/', '-')); await ensureDir(packageDir); // Create package.json if it doesn't exist const packageJsonPath = path.join(packageDir, 'package.json'); if (!(await fileExists(packageJsonPath))) { await writeJsonFile(packageJsonPath, { name: 'mcp-package-wrapper', version: '1.0.0', private: true, type: 'module' }); } // Install the package const installCmd = this.getInstallCommand(packageName, version); await exec(installCmd, { cwd: packageDir }); // Get installed version const nodeModulesDir = path.join(packageDir, 'node_modules'); const installedVersion = await this.getInstalledVersion(nodeModulesDir, packageName); // Find bin path if it exists const binPath = await this.findPackageBin(nodeModulesDir, packageName); // Add to registry const now = new Date().toISOString(); const localPath = path.join(nodeModulesDir, packageName); const installedPackage: InstalledPackage = { name: packageName, version: installedVersion, localPath, binPath, installedAt: now, updatedAt: now, dependencies: [], // TODO: Extract dependencies usedByConfigs: [] }; this.registry.packages[packageName] = installedPackage; await this.saveRegistry(); return { success: true, packageName, version: installedVersion, localPath, binPath }; } catch (error) { return { success: false, packageName, version: version || 'latest', localPath: '', error: error instanceof Error ? error.message : String(error) }; } }

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