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/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
// File for 'gemini mcp add' command
import type { CommandModule } from 'yargs';
import { loadSettings, SettingScope } from '../../config/settings.js';
import type { MCPServerConfig } from '@google/gemini-cli-core';
async function addMcpServer(
name: string,
commandOrUrl: string,
args: Array<string | number> | undefined,
options: {
scope: string;
transport: string;
env: string[] | undefined;
header: string[] | undefined;
timeout?: number;
trust?: boolean;
description?: string;
includeTools?: string[];
excludeTools?: string[];
},
) {
const {
scope,
transport,
env,
header,
timeout,
trust,
description,
includeTools,
excludeTools,
} = options;
const settingsScope =
scope === 'user' ? SettingScope.User : SettingScope.Workspace;
const settings = loadSettings(process.cwd());
let newServer: Partial<MCPServerConfig> = {};
const headers = header?.reduce(
(acc, curr) => {
const [key, ...valueParts] = curr.split(':');
const value = valueParts.join(':').trim();
if (key.trim() && value) {
acc[key.trim()] = value;
}
return acc;
},
{} as Record<string, string>,
);
switch (transport) {
case 'sse':
newServer = {
url: commandOrUrl,
headers,
timeout,
trust,
description,
includeTools,
excludeTools,
};
break;
case 'http':
newServer = {
httpUrl: commandOrUrl,
headers,
timeout,
trust,
description,
includeTools,
excludeTools,
};
break;
case 'stdio':
default:
newServer = {
command: commandOrUrl,
args: args?.map(String),
env: env?.reduce(
(acc, curr) => {
const [key, value] = curr.split('=');
if (key && value) {
acc[key] = value;
}
return acc;
},
{} as Record<string, string>,
),
timeout,
trust,
description,
includeTools,
excludeTools,
};
break;
}
const existingSettings = settings.forScope(settingsScope).settings;
const mcpServers = existingSettings.mcpServers || {};
const isExistingServer = !!mcpServers[name];
if (isExistingServer) {
console.log(
`MCP server "${name}" is already configured within ${scope} settings.`,
);
}
mcpServers[name] = newServer as MCPServerConfig;
settings.setValue(settingsScope, 'mcpServers', mcpServers);
if (isExistingServer) {
console.log(`MCP server "${name}" updated in ${scope} settings.`);
} else {
console.log(
`MCP server "${name}" added to ${scope} settings. (${transport})`,
);
}
}
export const addCommand: CommandModule = {
command: 'add <name> <commandOrUrl> [args...]',
describe: 'Add a server',
builder: (yargs) =>
yargs
.usage('Usage: gemini mcp add [options] <name> <commandOrUrl> [args...]')
.parserConfiguration({
'unknown-options-as-args': true, // Pass unknown options as server args
'populate--': true, // Populate server args after -- separator
})
.positional('name', {
describe: 'Name of the server',
type: 'string',
demandOption: true,
})
.positional('commandOrUrl', {
describe: 'Command (stdio) or URL (sse, http)',
type: 'string',
demandOption: true,
})
.option('scope', {
alias: 's',
describe: 'Configuration scope (user or project)',
type: 'string',
default: 'project',
choices: ['user', 'project'],
})
.option('transport', {
alias: 't',
describe: 'Transport type (stdio, sse, http)',
type: 'string',
default: 'stdio',
choices: ['stdio', 'sse', 'http'],
})
.option('env', {
alias: 'e',
describe: 'Set environment variables (e.g. -e KEY=value)',
type: 'array',
string: true,
})
.option('header', {
alias: 'H',
describe:
'Set HTTP headers for SSE and HTTP transports (e.g. -H "X-Api-Key: abc123" -H "Authorization: Bearer abc123")',
type: 'array',
string: true,
})
.option('timeout', {
describe: 'Set connection timeout in milliseconds',
type: 'number',
})
.option('trust', {
describe:
'Trust the server (bypass all tool call confirmation prompts)',
type: 'boolean',
})
.option('description', {
describe: 'Set the description for the server',
type: 'string',
})
.option('include-tools', {
describe: 'A comma-separated list of tools to include',
type: 'array',
string: true,
})
.option('exclude-tools', {
describe: 'A comma-separated list of tools to exclude',
type: 'array',
string: true,
})
.middleware((argv) => {
// Handle -- separator args as server args if present
if (argv['--']) {
const existingArgs = (argv['args'] as Array<string | number>) || [];
argv['args'] = [...existingArgs, ...(argv['--'] as string[])];
}
}),
handler: async (argv) => {
await addMcpServer(
argv['name'] as string,
argv['commandOrUrl'] as string,
argv['args'] as Array<string | number>,
{
scope: argv['scope'] as string,
transport: argv['transport'] as string,
env: argv['env'] as string[],
header: argv['header'] as string[],
timeout: argv['timeout'] as number | undefined,
trust: argv['trust'] as boolean | undefined,
description: argv['description'] as string | undefined,
includeTools: argv['includeTools'] as string[] | undefined,
excludeTools: argv['excludeTools'] as string[] | undefined,
},
);
},
};
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