Grok API and MCP: how to connect the chat models to your project

Grok is a family of chat models. NeuralSpace offers the following models: Grok 4.3, Grok 4.5, Grok 4.6. They all run through a single public API, and there is a ready MCP server for AI agents. The key is issued on the API keys page.

What Grok can do

Grok is a family of chat models with a lively, direct answering style. Three versions are available: Grok 4.3, Grok 4.5 and Grok 4.6. They understand and write text, work with code, answer questions and hold conversations through the same OpenAI-compatible endpoint as the other chat models.

API endpoint

Send a request to POST /v1/chat/completions. Example: {"model": "grok-4-6", "messages": [{"role": "user", "content": "Explain the topic"}]}. Authorization uses an API key in the x-api-key header. Available model ids: grok-4-3, grok-4-5, grok-4-6.

MCP tools

The NeuralSpace MCP server is available at POST /mcp (Streamable HTTP). To work with Grok, an agent uses the tools: chat, list_models, get_balance. This lets Claude Code, Cursor and other MCP clients use the site models directly.

How to connect

Sign up on NeuralSpace, open the API keys page and create an nsk-… key. Then pass it in the request header or in your MCP client settings. Full documentation is on the the /v1/docs page.

FAQ

Which Grok version is the newest?

Grok 4.6 is the newest and most powerful version in the catalog.

What format is the request?

OpenAI-compatible: POST /v1/chat/completions.

Where do I get an API key?

On the API keys page in the dashboard.