# How to integrate Openrouter MCP with Atomic Agent

```json
{
  "title": "How to integrate Openrouter MCP with Atomic Agent",
  "toolkit": "Openrouter",
  "toolkit_slug": "openrouter",
  "framework": "Atomic Agent",
  "framework_slug": "atomic-agent",
  "url": "https://composio.dev/toolkits/openrouter/framework/atomic-agent",
  "markdown_url": "https://composio.dev/toolkits/openrouter/framework/atomic-agent.md",
  "updated_at": "2026-08-11T13:12:56.379Z"
}
```

## Introduction

Atomic Agent is an open-source AI agent that runs on your machine and supports local models through llama.cpp. Connect it to 1,500+ apps through Composio, including Openrouter.
This guide uses Atomic Agent's built-in Composio integration. You need Atomic Agent v0.5.6 or later, your own Composio API key, and a Openrouter account. See the [Atomic Agent documentation](https://atomicagent.io/docs/?cta_placement=atomic-agent-docs) for installation instructions.

## Also integrate Openrouter with

- [ChatGPT](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)
- [Grok Build](https://composio.dev/toolkits/openrouter/framework/grok-build)
- [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)
- [Pydantic AI](https://composio.dev/toolkits/openrouter/framework/pydantic-ai)
- [AutoGen](https://composio.dev/toolkits/openrouter/framework/autogen)

## TL;DR

### How Atomic Agent connects to Openrouter
Atomic Agent connects to Composio's Tool Router over Streamable HTTP MCP. It discovers the tools needed for your request, and Composio handles account authentication.
Execution and account-connection tools follow Atomic Agent's configured approval policy. Review any approval prompt before allowing an action on your connected account.

## Connect Openrouter to Atomic Agent

### Connect Openrouter to Atomic Agent
- Sign up or sign in to the [Composio dashboard](https://dashboard.composio.dev/?cta_placement=atomic-agent-api-key). Copy your API key.
- In Atomic Agent, open the Integrations tab and select Composio. Select API key, press e, paste the key, and press Enter. The tools become available immediately, without a restart.
- Ask Atomic Agent to do something in Openrouter. It searches Composio for the right tool.
- On first use, open the sign-in link returned in the chat. Connect your Openrouter account, then return to Atomic Agent to continue.
### Headless setup
Add the following line to ~/.atomic-agent/.env, replacing YOUR_COMPOSIO_API_KEY with your key. Start Atomic Agent after saving the file.

```bash
COMPOSIO_API_KEY=YOUR_COMPOSIO_API_KEY
```

## 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.

## Troubleshooting

### Why is my API key rejected?

Copy the key directly from the Composio dashboard. Atomic Agent requires ASCII characters because it sends the key in an HTTP header. Remove any extra characters introduced when copying.

### Why are Composio tools unavailable after saving a key?

Check that you use Atomic Agent v0.5.6 or later and that Composio is enabled in your configuration. A "composio": { "enabled": false } setting disables the integration while keeping the saved key on disk.

### Does Composio have a free plan?

The Hobby plan includes 100,000 tool calls per month. Composio-managed OAuth apps have a lower included allowance. See [Composio pricing](/pricing) for the current limits that apply to your connection.

## Complete Code

None listed.

## Conclusion

### Use Openrouter from Atomic Agent
With your account connected, ask Atomic Agent to work with Openrouter in natural language. You can connect more apps through the same Composio integration as you need them.
Visit the [Atomic Agent website](https://atomicagent.io/?cta_placement=atomic-agent-site) or inspect the [Atomic Agent source code](https://github.com/AtomicBot-ai/atomic-agent?cta_placement=atomic-agent-repo).

## How to build Openrouter MCP Agent with another framework

- [ChatGPT](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)
- [Grok Build](https://composio.dev/toolkits/openrouter/framework/grok-build)
- [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)
- [Pydantic AI](https://composio.dev/toolkits/openrouter/framework/pydantic-ai)
- [AutoGen](https://composio.dev/toolkits/openrouter/framework/autogen)

## 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.
- [AltTextLab](https://composio.dev/toolkits/alt_text_lab) - AltTextLab is an AI service that generates accessible, SEO-aware alt text for images. It helps teams make image content easier to understand, index, and publish.
- [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.
- [Apiframe](https://composio.dev/toolkits/apiframe) - Apiframe is an API platform for generating and managing AI images, videos, music, uploads, assets, jobs, and custom LoRAs. It gives developers one clean API for creative AI workflows without juggling multiple model providers.
- [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.
- [Arize AX](https://composio.dev/toolkits/arize_ax) - Arize AX is an AI engineering platform for tracing, evaluating, and improving AI applications. Use it to debug LLM behavior, compare experiments, and improve production AI quality.
- [Artificial Analysis](https://composio.dev/toolkits/artificial_analysis) - Artificial Analysis is an independent benchmarking platform for AI models and API providers. Use it to compare model intelligence, coding, math, pricing, latency, throughput, and arena rankings.
- [AssemblyAI](https://composio.dev/toolkits/assemblyai) - AssemblyAI is a speech-to-text and audio intelligence API for uploaded or hosted media. Use it to turn audio and video into accurate transcripts, summaries, and insights.
- [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.
- [Avoma](https://composio.dev/toolkits/avoma) - Avoma is an AI meeting assistant for recording, transcribing, analyzing, and managing meetings, calls, notes, scorecards, and conversation intelligence. It helps teams turn conversations into searchable notes, follow-ups, coaching insights, and revenue intelligence.
- [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.
- [Bland AI](https://composio.dev/toolkits/bland_ai) - Bland AI is a conversational AI platform for building voice agents, phone calls, messaging, and communication workflows. Use it to automate calling, evaluate conversations, and run voice operations at scale.
- [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.

## Frequently Asked Questions

### What are the differences in Tool Router MCP and Openrouter MCP?

With a standalone Openrouter MCP server, the agents and LLMs can only access a fixed set of Openrouter tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Openrouter and many other apps based on the task at hand, all through a single MCP endpoint.

### Can I use Tool Router MCP with Atomic Agent?

Yes, you can. Atomic Agent fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Openrouter tools.

### Can I manage the permissions and scopes for Openrouter while using Tool Router?

Yes, absolutely. You can configure which Openrouter scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

### How safe is my data with Composio Tool Router?

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Openrouter data and credentials are handled as safely as possible.

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