# How to integrate Openrouter MCP with Grok Build

```json
{
  "title": "How to integrate Openrouter MCP with Grok Build",
  "toolkit": "Openrouter",
  "toolkit_slug": "openrouter",
  "framework": "Grok Build",
  "framework_slug": "grok-build",
  "url": "https://composio.dev/toolkits/openrouter/framework/grok-build",
  "markdown_url": "https://composio.dev/toolkits/openrouter/framework/grok-build.md",
  "updated_at": "2026-05-12T10:20:56.035Z"
}
```

## Introduction

### How to integrate Openrouter MCP with Grok Build
[Grok Build](https://docs.x.ai/build/overview) is xAI's terminal coding agent. It runs on Grok 4.5, plans its work before it acts, and can run multiple sub-agents in parallel. It also reads Claude Code's MCP configuration, so any server you already have in a .mcp.json is picked up with no changes.
In this guide, I will show you how to connect your Openrouter account to Grok Build through Composio, so it can generate Python code from this prompt, summarize this article using Claude-3, list all available Llama-3 model endpoints, and more without leaving the terminal. Composio holds the OAuth tokens for you, and Grok Build only calls the tools you approve.

## Also integrate Openrouter with

- [ChatGPT Work](https://composio.dev/toolkits/openrouter/framework/chatgpt)
- [Antigravity](https://composio.dev/toolkits/openrouter/framework/antigravity)
- [OpenAI Agents SDK](https://composio.dev/toolkits/openrouter/framework/open-ai-agents-sdk)
- [Claude Agent SDK](https://composio.dev/toolkits/openrouter/framework/claude-agents-sdk)
- [Claude Code](https://composio.dev/toolkits/openrouter/framework/claude-code)
- [Claude Cowork](https://composio.dev/toolkits/openrouter/framework/claude-cowork)
- [Codex](https://composio.dev/toolkits/openrouter/framework/codex)
- [Kimi Code](https://composio.dev/toolkits/openrouter/framework/kimi)
- [Cursor](https://composio.dev/toolkits/openrouter/framework/cursor)
- [VS Code](https://composio.dev/toolkits/openrouter/framework/vscode)
- [OpenCode](https://composio.dev/toolkits/openrouter/framework/opencode)
- [OpenClaw](https://composio.dev/toolkits/openrouter/framework/openclaw)
- [Hermes](https://composio.dev/toolkits/openrouter/framework/hermes-agent)
- [CLI](https://composio.dev/toolkits/openrouter/framework/cli)
- [Google ADK](https://composio.dev/toolkits/openrouter/framework/google-adk)
- [LangChain](https://composio.dev/toolkits/openrouter/framework/langchain)
- [Vercel AI SDK](https://composio.dev/toolkits/openrouter/framework/ai-sdk)
- [Mastra AI](https://composio.dev/toolkits/openrouter/framework/mastra-ai)
- [LlamaIndex](https://composio.dev/toolkits/openrouter/framework/llama-index)
- [CrewAI](https://composio.dev/toolkits/openrouter/framework/crew-ai)

## TL;DR

### Why use Composio over a standalone MCP server?
- Read and write access. Composio's Openrouter integration lets Grok Build take real actions like creating drafts, sending updates, and labeling records, not just reading data.
- 1,000+ SaaS toolkits out of the box. One endpoint gives you a full catalog of pre-built connectors, from Gmail and Slack to Notion, Linear, and Salesforce.
- One MCP server for every app. Wire up a single Composio server instead of maintaining a separate MCP entry for each app.
- Smart, context-aware tool loading. Grok Build caps how many tools it holds in a single request. Composio loads only the tools a task needs, so you do not spend that budget on tools you are not using.
- Cross-app automation. Chain actions across apps in one run. Pull a thread, summarize it in Notion, and post the highlights to Slack from a single prompt.

## Connect Openrouter to Grok Build

### Prerequisites
- Grok Build installed and signed in. Install with curl -fsSL https://x.ai/cli/install.sh | bash on macOS or Linux, or irm https://x.ai/cli/install.ps1 | iex on Windows PowerShell. On first launch Grok opens a browser to authenticate; for headless or CI use, set an XAI_API_KEY environment variable instead (create the key at [console.x.ai](https://console.x.ai/)).
- Access to the Openrouter account you want to connect.
- The [Composio MCP endpoint](https://dashboard.composio.dev/login?utm_source=toolkits&utm_medium=framework_template&utm_campaign=grok-build&utm_content=composio_connect). Composio's server is remote and hosted, so there is nothing to run locally and no tunnel to set up.
### Step-by-step: Connect Openrouter to Grok Build
### 1. Install and verify Grok Build
Install the CLI, then restart your shell so the grok binary lands on your PATH:

```bash
curl -fsSL https://x.ai/cli/install.sh | bash
which grok
```

## What is the Openrouter MCP server, and what's possible with it?

The Openrouter MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Openrouter account. It provides structured and secure access to a wide range of large language models, so your agent can generate completions, manage model access, check credits, and retrieve generation details seamlessly on your behalf.
- Unified model completions: Let your agent generate chat-based or text completions using any model available through Openrouter, perfect for conversation or content creation tasks.
- Model catalog and provider discovery: Ask your agent to list all available AI models and providers, helping you compare capabilities, endpoints, and pricing in real time.
- Credit monitoring and usage tracking: Have your agent fetch your current API credit balance, so you always know your usage limits before starting new tasks.
- Generation result retrieval: Direct your agent to pull detailed metadata for any previous generation, including token counts, costs, and latency for analysis or auditing.
- Endpoint and configuration info: Empower your agent to fetch the latest model endpoints and supported parameters, making it easy to fine-tune routing and optimize performance.

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `OPENROUTER_CREATE_CHAT_COMPLETION` | Create Chat Completion | Tool to generate a chat-style completion. Use after assembling messages and selecting a model. Supports streaming and function calls. Response format varies across models; use explicit prompt instructions to standardize output. Provider-level rate limits and moderation policies differ per model. |
| `OPENROUTER_CREATE_COINBASE_CHARGE` | Create Coinbase Charge | Tool to create a Coinbase charge for crypto payment to add credits to your OpenRouter account. Use when you need to purchase credits using cryptocurrency. Returns calldata needed to fulfill the transaction on the specified blockchain. |
| `OPENROUTER_CREATE_MESSAGE` | Create Message (Anthropic Format) | Tool to create a message using Anthropic Messages API format via OpenRouter. Use when you need Claude-compatible chat completion with support for text, images, PDFs, tools, and extended thinking. |
| `OPENROUTER_GET_CREDITS` | Get Credits | Tool to get the current API credit balance for the authenticated user. Use before large or batch jobs to verify sufficient balance. A successful response may return total_credits=0, which confirms authentication but will cause all paid model generations to fail. Avoid polling this endpoint; call only as needed. |
| `OPENROUTER_GET_CURRENT_KEY` | Get Current Key | Tool to get information about the currently authenticated API key. Use to check usage limits, spending, and key metadata. |
| `OPENROUTER_GET_GENERATION` | Get Generation | Tool to retrieve a generation result by its unique ID. Use after a generation completes to fetch metadata like token counts, cost, and latency. |
| `OPENROUTER_GET_MODELS_COUNT` | Get Models Count | Tool to get the total count of available models on OpenRouter. Use when you need to know how many models are available without fetching the full list. |
| `OPENROUTER_LIST_AVAILABLE_MODELS` | List Available Models | Tool to list available models via OpenRouter API. Use after confirming authentication to fetch the model catalog. Use exact model IDs returned here in OPENROUTER_CREATE_CHAT_COMPLETION or OPENROUTER_CREATE_COMPLETION calls — hard-coded IDs may break when the catalog changes. Use exact author and slug values from this response as inputs to OPENROUTER_LIST_MODEL_ENDPOINTS. Models have varying capabilities (e.g., tools, reasoning); verify individual model capabilities before downstream use. Pricing and latency metadata may be null or approximate — handle missing values in routing logic. |
| `OPENROUTER_LIST_EMBEDDING_MODELS` | List Embedding Models | Tool to list all available embeddings models via OpenRouter API. Returns a list of embeddings models with their properties including architecture, pricing, and capabilities. |
| `OPENROUTER_LIST_MODEL_ENDPOINTS` | OpenRouter List Model Endpoints | Tool to list endpoints for a specific model. Use after specifying model author and slug to get endpoint details including pricing, context length, and supported parameters. Some metadata fields (e.g., latency, pricing) may be null or approximate; handle missing values in routing logic. |
| `OPENROUTER_LIST_PROVIDERS` | OpenRouter List Providers | Tool to list all AI model providers available through the OpenRouter API. Use after authentication to retrieve available provider options for routing configuration. Providers differ in latency, context window sizes, and rate limits — switching providers affects these constraints. Newly added providers may not appear immediately due to catalog propagation delays. |
| `OPENROUTER_LIST_USER_MODELS` | List User Models | Tool to list models filtered by user provider preferences, privacy settings, and guardrails. Use after authenticating to get models tailored to the user's configuration. |
| `OPENROUTER_LIST_ZDR_ENDPOINTS` | OpenRouter List ZDR Endpoints | Tool to preview the impact of Zero Data Retention (ZDR) on the available endpoints. Use to see which model endpoints remain accessible when ZDR is enabled. |

## Supported Triggers

None listed.

## Creating MCP Server - Stand-alone vs Composio SDK

Once connected, Grok Build can access the Openrouter MCP server via Composio to run the app actions you authorize, directly from your terminal.

## Complete Code

None listed.

## How to build Openrouter MCP Agent with another framework

- [ChatGPT Work](https://composio.dev/toolkits/openrouter/framework/chatgpt)
- [Antigravity](https://composio.dev/toolkits/openrouter/framework/antigravity)
- [OpenAI Agents SDK](https://composio.dev/toolkits/openrouter/framework/open-ai-agents-sdk)
- [Claude Agent SDK](https://composio.dev/toolkits/openrouter/framework/claude-agents-sdk)
- [Claude Code](https://composio.dev/toolkits/openrouter/framework/claude-code)
- [Claude Cowork](https://composio.dev/toolkits/openrouter/framework/claude-cowork)
- [Codex](https://composio.dev/toolkits/openrouter/framework/codex)
- [Kimi Code](https://composio.dev/toolkits/openrouter/framework/kimi)
- [Cursor](https://composio.dev/toolkits/openrouter/framework/cursor)
- [VS Code](https://composio.dev/toolkits/openrouter/framework/vscode)
- [OpenCode](https://composio.dev/toolkits/openrouter/framework/opencode)
- [OpenClaw](https://composio.dev/toolkits/openrouter/framework/openclaw)
- [Hermes](https://composio.dev/toolkits/openrouter/framework/hermes-agent)
- [CLI](https://composio.dev/toolkits/openrouter/framework/cli)
- [Google ADK](https://composio.dev/toolkits/openrouter/framework/google-adk)
- [LangChain](https://composio.dev/toolkits/openrouter/framework/langchain)
- [Vercel AI SDK](https://composio.dev/toolkits/openrouter/framework/ai-sdk)
- [Mastra AI](https://composio.dev/toolkits/openrouter/framework/mastra-ai)
- [LlamaIndex](https://composio.dev/toolkits/openrouter/framework/llama-index)
- [CrewAI](https://composio.dev/toolkits/openrouter/framework/crew-ai)

## Related Toolkits

- [Composio](https://composio.dev/toolkits/composio) - Composio is an integration platform that connects AI agents with hundreds of business tools. It streamlines authentication and lets you trigger actions across services—no custom code needed.
- [Composio search](https://composio.dev/toolkits/composio_search) - Composio search is a unified web search toolkit spanning travel, e-commerce, news, financial markets, images, and more. It lets you and your apps tap into up-to-date web data from a single, easy-to-integrate service.
- [Perplexityai](https://composio.dev/toolkits/perplexityai) - Perplexityai delivers natural, conversational AI models for generating human-like text. Instantly get context-aware, high-quality responses for chat, search, or complex workflows.
- [Browser tool](https://composio.dev/toolkits/browser_tool) - Browser tool is a virtual browser integration that lets AI agents interact with the web programmatically. It enables automated browsing, scraping, and action-taking from any AI workflow.
- [Ai ml api](https://composio.dev/toolkits/ai_ml_api) - Ai ml api is a suite of AI/ML models for natural language and image tasks. It provides fast, scalable access to advanced AI capabilities for your apps and workflows.
- [Aivoov](https://composio.dev/toolkits/aivoov) - Aivoov is an AI-powered text-to-speech platform offering 1,000+ voices in over 150 languages. Instantly turn written content into natural, human-like audio for any application.
- [All images ai](https://composio.dev/toolkits/all_images_ai) - All-Images.ai is an AI-powered image generation and management platform. It helps you create, search, and organize images effortlessly with advanced AI capabilities.
- [Anthropic administrator](https://composio.dev/toolkits/anthropic_administrator) - Anthropic administrator is an API for managing Anthropic organizational resources like members, workspaces, and API keys. It helps you automate admin tasks and streamline resource management across your Anthropic organization.
- [Api labz](https://composio.dev/toolkits/api_labz) - Api labz is a platform offering a suite of AI-driven APIs and workflow tools. It helps developers automate tasks and build smarter, more efficient applications.
- [Apipie ai](https://composio.dev/toolkits/apipie_ai) - Apipie ai is an AI model aggregator offering a single API for accessing top AI models from multiple providers. It helps developers build cost-efficient, latency-optimized AI solutions without juggling multiple integrations.
- [Astica ai](https://composio.dev/toolkits/astica_ai) - Astica ai provides APIs for computer vision, NLP, and voice synthesis. Integrate advanced AI features into your app with a single API key.
- [Bigml](https://composio.dev/toolkits/bigml) - BigML is a machine learning platform that lets you build, train, and deploy predictive models from your data. Its intuitive interface and robust API make machine learning accessible and efficient.
- [Botbaba](https://composio.dev/toolkits/botbaba) - Botbaba is a platform for building, managing, and deploying conversational AI chatbots across messaging channels. It streamlines chatbot automation, making it easier to integrate AI into customer interactions.
- [Botpress](https://composio.dev/toolkits/botpress) - Botpress is an open-source platform for building, deploying, and managing chatbots. It helps teams automate conversations and deliver rich, interactive messaging experiences.
- [Chatbotkit](https://composio.dev/toolkits/chatbotkit) - Chatbotkit is a platform for building and managing AI-powered chatbots using robust APIs and SDKs. It lets you easily add conversational AI to your apps for better user engagement.
- [Cody](https://composio.dev/toolkits/cody) - Cody is an AI assistant built for businesses, trained on your company's knowledge and data. It delivers instant answers and insights, tailored for your team.
- [Context7 MCP](https://composio.dev/toolkits/context7_mcp) - Context7 MCP delivers live, version-specific code docs and examples right from the source. It helps developers and AI agents instantly retrieve authoritative programming info—no more out-of-date docs.
- [Customgpt](https://composio.dev/toolkits/customgpt) - CustomGPT.ai lets you build and deploy chatbots tailored to your own data and business needs. Get precise and context-aware AI conversations without writing code.
- [Datarobot](https://composio.dev/toolkits/datarobot) - Datarobot is a machine learning platform that automates model development, deployment, and monitoring. It empowers organizations to quickly gain predictive insights from large datasets.
- [Deepgram](https://composio.dev/toolkits/deepgram) - Deepgram is an AI-powered speech recognition platform for accurate audio transcription and understanding. It enables fast, scalable speech-to-text with advanced audio intelligence features.

## Frequently Asked Questions

### What is the difference between the Composio Tool Router and a standalone Openrouter MCP server?

A standalone Openrouter MCP server gives Grok Build a fixed set of Openrouter tools tied to that one server. The Composio Tool Router lets Grok Build load tools from Openrouter and many other apps on demand, based on the task, all through a single endpoint.

### Does Grok Build support MCP?

Yes. Grok Build ships with native MCP support. Add a server with the grok mcp add command, from the in-session /mcps modal, or by editing ~/.grok/config.toml. It also reads Claude Code-style .mcp.json files, so Grok Build discovers the tools automatically.

### Can I reuse the same MCP config I already use with Claude Code?

Yes. Grok Build has zero-migration compatibility with Claude Code's configuration, so the same Composio server entry works in both without edits.

### How safe is my Openrouter data with Composio?

Tokens, keys, and configuration are encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant, so your Openrouter data and credentials are handled to that standard.

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