Click on "Install Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type @ followed by the MCP server name and your instructions, e.g., "@DeepSeek Subagent MCP Server Review this code for bugs and edge cases"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
MCP server that lets Codex (or any MCP client) delegate sub-tasks to DeepSeek as a sub-agent.
Single tool deepseek_task: give it a task (+ optional context), get back DeepSeek's final answer.
🧠 Single tool deepseek_task — delegate independent work (research/draft/review/refactor/analysis)
💰 Defaults to deepseek-v4-flash (cost-effective), switch to deepseek-v4-pro via env
🔍 Surfaces reasoning_content (V4 thinking mode) as a <thinking> block
⚡ Zero non-MCP dependencies, one-line npx deploy
Related MCP server: deepseek-mcp
Node.js >= 18
A DeepSeek API key: https://platform.deepseek.com
cd deepseek-subagent-mcp-server
npm install
npm startVariable | Required | Default | Description |
| ✅ | — | Your DeepSeek API key. |
|
| Model. Also | |
|
| Override endpoint (for proxies). | |
|
| Default max output tokens. |
Add to Codex's MCP configuration:
{
"mcpServers": {
"deepseek-subagent": {
"type": "stdio",
"command": "npx",
"args": ["-y", "deepseek-subagent-mcp-server"],
"env": {
"DEEPSEEK_API_KEY": "your-deepseek-api-key",
"DEEPSEEK_MODEL": "deepseek-v4-flash"
}
}
}
}Or run from a local checkout:
{
"mcpServers": {
"deepseek-subagent": {
"command": "node",
"args": ["D:\\GitHub\\MCP\\deepseek-subagent-mcp-server\\src\\index.js"],
"env": {
"DEEPSEEK_API_KEY": "your-key-here"
}
}
}
}deepseek_taskParameter | Type | Required | Description |
| string | ✅ | The sub-task for DeepSeek. Be specific about what to do and output format. |
| string | Optional context material (code, notes, snippets). | |
| string | Optional custom system prompt (defaults to a subagent persona). | |
| number | Max output tokens. Default 8192. | |
| number | 0-2. Omit to use model default. |
# Delegate a code review
deepseek_task(task="Review this function for bugs and edge cases", context="<code>...")
# Delegate a research task
deepseek_task(task="Summarize the key risks of a subscription pricing model")MIT
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If you are the server author, to access and configure the admin panel.
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