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How to integrate Openrouter MCP with OpenAI Agents SDK

Connect OpenAI Agents SDK to Openrouter MCP. Generate python code from this prompt, summarize this article using claude-3, and more using natural language, with authentication handled for you.

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OpenRouter is a unified API platform for accessing language models from various providers. It lets you easily integrate and switch between multiple LLMs with a single API.

122 Tools

Introduction

This guide walks you through connecting Openrouter to the OpenAI Agents SDK using the Composio tool router. By the end, you'll have a working Openrouter agent that can chat with models from many providers, create embeddings, generate speech and video, rerank content, and check your credits through natural language commands.

This guide will help you understand how to give your OpenAI Agents SDK agent real control over a Openrouter account through Composio's Openrouter MCP server.

Before we dive in, let's take a quick look at the key ideas and tools involved.

For exact tool slugs and parameter tables, see the tool catalog in the Composio docs.

Also integrate Openrouter with

Claude CodeCursorChatGPTClaude CoworkAntigravityClaude Agent SDKCodexKimi CodeGrok BuildVS CodeOpenCodeOpenClawHermesAtomic AgentCLIGoogle ADKLangChainVercel AI SDKMastra AILlamaIndexCrewAIPydantic AIAutoGen

TL;DR

Here's what you'll learn:
  • Get and set up your OpenAI and Composio API keys
  • Install the necessary dependencies
  • Initialize Composio and create a Tool Router session for Openrouter
  • Configure an AI agent that can use Openrouter as a tool
  • Run a live chat session where you can ask the agent to perform Openrouter operations

What is OpenAI Agents SDK?

The OpenAI Agents SDK is a lightweight framework for building AI agents that can use tools and maintain conversation state. It provides a simple interface for creating agents with hosted MCP tool support.

Key features include:

  • Hosted MCP Tools: Connect to external services through hosted MCP endpoints
  • SQLite Sessions: Persist conversation history across interactions
  • Simple API: Clean interface with Agent, Runner, and tool configuration
  • Streaming Support: Real-time response streaming for interactive applications

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.

What is the Composio tool router, and how does it fit here?

What is Composio SDK?

Composio's Composio SDK helps agents find the right tools for a task at runtime. You can plug in multiple toolkits (like Gmail, HubSpot, and GitHub), and the agent will identify the relevant app and action to complete multi-step workflows. This can reduce token usage and improve the reliability of tool calls. Read more here: Getting started with Composio SDK

The tool router generates a secure MCP URL that your agents can access to perform actions.

How the Composio SDK works

The Composio SDK follows a three-phase workflow:

  1. Discovery: Searches for tools matching your task and returns relevant toolkits with their details.
  2. Authentication: Checks for active connections. If missing, creates an auth config and returns a connection URL via Auth Link.
  3. Execution: Executes the action using the authenticated connection.

Step-by-step Guide

Step by step09 STEPS
1

Prerequisites

Before starting, make sure you have:
  • Composio API Key and OpenAI API Key
  • Primary know-how of OpenAI Agents SDK
  • A live Openrouter project
  • Some knowledge of Python or Typescript
2

Getting API Keys for OpenAI and Composio

OpenAI API Key
  • Go to the OpenAI dashboard and create an API key. You'll need credits to use the models, or you can connect to another model provider.
  • Keep the API key safe.
Composio API Key
3

Install dependencies

npm install @composio/openai-agents @openai/agents dotenv

Install the Composio SDK and the OpenAI Agents SDK.

4

Set up environment variables

bash
OPENAI_API_KEY=sk-...your-api-key
COMPOSIO_API_KEY=your-api-key
USER_ID=composio_user@gmail.com

Create a .env file and add your OpenAI and Composio API keys.

5

Import dependencies

import 'dotenv/config';
import { Composio } from '@composio/core';
import { OpenAIAgentsProvider } from '@composio/openai-agents';
import { Agent, hostedMcpTool, run, OpenAIConversationsSession } from '@openai/agents';
import * as readline from 'readline';
What's happening:
  • You're importing all necessary libraries.
  • The Composio and OpenAIAgentsProvider classes are imported to connect your OpenAI agent to Composio tools like Openrouter.
6

Set up the Composio instance

dotenv.config();

const composioApiKey = process.env.COMPOSIO_API_KEY;
const userId = process.env.USER_ID;

if (!composioApiKey) {
  throw new Error('COMPOSIO_API_KEY is not set. Create a .env file with COMPOSIO_API_KEY=your_key');
}
if (!userId) {
  throw new Error('USER_ID is not set');
}

// Initialize Composio
const composio = new Composio({
  apiKey: composioApiKey,
  provider: new OpenAIAgentsProvider(),
});
What's happening:
  • dotenv.config() loads your .env file so COMPOSIO_API_KEY and USER_ID are available as environment variables.
  • Creating a Composio instance using the API Key and OpenAIAgentsProvider class.
7

Create a Tool Router session

// Create Tool Router session for Openrouter
const session = await composio.create(userId as string, {
  toolkits: ['openrouter'],
});
const mcpUrl = session.mcp.url;

What is happening:

  • You give the Tool Router the user id and the toolkits you want available. Here, it is only openrouter.
  • The router checks the user's Openrouter connection and prepares the MCP endpoint.
  • The returned session.mcp.url is the MCP URL that your agent will use to access Openrouter.
  • This approach keeps things lightweight and lets the agent request Openrouter tools only when needed during the conversation.
8

Configure the agent

// Configure agent with MCP tool
const agent = new Agent({
  name: 'Assistant',
  model: 'gpt-5',
  instructions:
    'You are a helpful assistant that can access Openrouter. Help users perform Openrouter operations through natural language.',
  tools: [
    hostedMcpTool({
      serverLabel: 'tool_router',
      serverUrl: mcpUrl,
      headers: { 'x-api-key': composioApiKey },
      requireApproval: 'never',
    }),
  ],
});
What's happening:
  • We're creating an Agent instance with a name, model (gpt-5), and clear instructions about its purpose.
  • The agent's instructions tell it that it can access Openrouter and help with queries, inserts, updates, authentication, and fetching database information.
  • The tools array includes a hostedMcpTool that connects to the MCP server URL we created earlier.
  • The headers object includes the Composio API key for secure authentication with the MCP server.
  • requireApproval: 'never' means the agent can execute Openrouter operations without asking for permission each time, making interactions smoother.
9

Start chat loop and handle conversation

// Keep conversation state across turns
const conversationSession = new OpenAIConversationsSession();

// Simple CLI
const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout,
  prompt: 'You: ',
});

console.log('\nComposio Tool Router session created.');
console.log('\nChat started. Type your requests below.');
console.log("Commands: 'exit', 'quit', or 'q' to end\n");

try {
  const first = await run(agent, 'What can you help me with?', { session: conversationSession });
  console.log(`Assistant: ${first.finalOutput}\n`);
} catch (e) {
  console.error('Error:', e instanceof Error ? e.message : e, '\n');
}

rl.prompt();

rl.on('line', async (userInput) => {
  const text = userInput.trim();

  if (['exit', 'quit', 'q'].includes(text.toLowerCase())) {
    console.log('Goodbye!');
    rl.close();
    process.exit(0);
  }

  if (!text) {
    rl.prompt();
    return;
  }

  try {
    const result = await run(agent, text, { session: conversationSession });
    console.log(`\nAssistant: ${result.finalOutput}\n`);
  } catch (e) {
    console.error('Error:', e instanceof Error ? e.message : e, '\n');
  }

  rl.prompt();
});

rl.on('close', () => {
  console.log('\n👋 Session ended.');
  process.exit(0);
});
What's happening:
  • The program prints a session URL that you visit to authorize Openrouter.
  • After authorization, the chat begins.
  • Each message you type is processed by the agent using run().
  • The responses are printed to the console.
  • Typing exit, quit, or q cleanly ends the chat.

Complete Code

Here's the complete code to get you started with Openrouter and OpenAI Agents SDK:

import 'dotenv/config';
import { Composio } from '@composio/core';
import { OpenAIAgentsProvider } from '@composio/openai-agents';
import { Agent, hostedMcpTool, run, OpenAIConversationsSession } from '@openai/agents';
import * as readline from 'readline';

const composioApiKey = process.env.COMPOSIO_API_KEY;
const userId = process.env.USER_ID;

if (!composioApiKey) {
  throw new Error('COMPOSIO_API_KEY is not set. Create a .env file with COMPOSIO_API_KEY=your_key');
}
if (!userId) {
  throw new Error('USER_ID is not set');
}

// Initialize Composio
const composio = new Composio({
  apiKey: composioApiKey,
  provider: new OpenAIAgentsProvider(),
});

async function main() {
  // Create Tool Router session
  const session = await composio.create(userId as string, {
    toolkits: ['openrouter'],
  });
  const mcpUrl = session.mcp.url;

  // Configure agent with MCP tool
  const agent = new Agent({
    name: 'Assistant',
    model: 'gpt-5',
    instructions:
      'You are a helpful assistant that can access Openrouter. Help users perform Openrouter operations through natural language.',
    tools: [
      hostedMcpTool({
        serverLabel: 'tool_router',
        serverUrl: mcpUrl,
        headers: { 'x-api-key': composioApiKey },
        requireApproval: 'never',
      }),
    ],
  });

  // Keep conversation state across turns
  const conversationSession = new OpenAIConversationsSession();

  // Simple CLI
  const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
    prompt: 'You: ',
  });

  console.log('\nComposio Tool Router session created.');
  console.log('\nChat started. Type your requests below.');
  console.log("Commands: 'exit', 'quit', or 'q' to end\n");

  try {
    const first = await run(agent, 'What can you help me with?', { session: conversationSession });
    console.log(`Assistant: ${first.finalOutput}\n`);
  } catch (e) {
    console.error('Error:', e instanceof Error ? e.message : e, '\n');
  }

  rl.prompt();

  rl.on('line', async (userInput) => {
    const text = userInput.trim();

    if (['exit', 'quit', 'q'].includes(text.toLowerCase())) {
      console.log('Goodbye!');
      rl.close();
      process.exit(0);
    }

    if (!text) {
      rl.prompt();
      return;
    }

    try {
      const result = await run(agent, text, { session: conversationSession });
      console.log(`\nAssistant: ${result.finalOutput}\n`);
    } catch (e) {
      console.error('Error:', e instanceof Error ? e.message : e, '\n');
    }

    rl.prompt();
  });

  rl.on('close', () => {
    console.log('\nSession ended.');
    process.exit(0);
  });
}

main().catch((err) => {
  console.error('Fatal error:', err);
  process.exit(1);
});

Conclusion

This was a starter code for integrating Openrouter MCP with OpenAI Agents SDK to build a functional AI agent that can interact with Openrouter.

Key features:

  • Hosted MCP tool integration through Composio's Tool Router
  • SQLite session persistence for conversation history
  • Simple async chat loop for interactive testing
You can extend this by adding more toolkits, implementing custom business logic, or building a web interface around the agent.
TOOLS

Supported Tools

Every Openrouter action and event your agent gets out of the box.

Activate a validated private endpoint

Make a validated draft routable.

Bulk add members to a workspace

Add multiple organization members to a workspace.

Bulk assign keys to a guardrail

Assign multiple API keys to a specific guardrail.

Bulk assign members to a guardrail

Assign multiple organization members to a specific guardrail.

Bulk remove members from a workspace

Remove multiple members from a workspace.

Bulk unassign keys from a guardrail

Unassign multiple API keys from a specific guardrail.

Bulk unassign members from a guardrail

Unassign multiple organization members from a specific guardrail.

Create a new API key

Create a new API key for the authenticated user.

Create authorization code

Create an authorization code for the PKCE flow to generate a user-controlled API key

Create a batch

Creates a batch of requests that run asynchronously against a single endpoint (`/v1/chat/completions`, `/v1/responses`, `/v1/messages`, `/v1/embeddings`).

Create a BYOK provider credential

Create a new bring-your-own-key (BYOK) provider credential.

Create Chat Completion

Generate a chat-style completion from messages and a selected model, with function-call request options.

Create Coinbase Charge

Tool to create a Coinbase charge for crypto payment to add credits to your OpenRouter account.

Create Embeddings

Create vector embeddings for text, token, or multimodal inputs.

Create a guardrail

Create a new guardrail for the authenticated user.

Create Message (Anthropic Format)

Create a message using Anthropic Messages API format via OpenRouter, with text, image, PDF, tool, and extended-thinking request options.

Create an observability destination

Create a new observability destination.

Create a preset from a chat-completions request body

Creates a preset (or a new version of an existing one) from an inference request body.

Create a preset from a messages request body

Creates a preset (or a new version of an existing one) from an inference request body.

Create a preset from a responses request body

Creates a preset (or a new version of an existing one) from an inference request body.

Create a private endpoint

Create a private endpoint as a draft.

Create a SCIM group mapping

Create a SCIM group-to-workspace role mapping.

Start a SCIM directory sync

Start a SCIM directory sync.

Create Speech

Synthesize speech from text or multi-speaker turns.

Create Transcription

Transcribe audio into text using an OpenRouter speech-to-text model.

Create Video Generation

Submit an asynchronous video generation job to OpenRouter.

Create a workspace

Create a new workspace for the authenticated user.

Delete an API key

Delete one of the authenticated account's own API keys, revoking the selected key's access.

Delete a batch

Deletes a batch in a terminal status (`completed`, `failed`, `expired`, or `cancelled`) and its stored requests and results.

Delete a BYOK provider credential

Delete (soft-delete) a bring-your-own-key (BYOK) provider credential by its `id`.

Delete a file

Deletes a file owned by the requesting workspace.

Delete a guardrail

Delete an existing guardrail.

Delete an observability destination

Delete an existing observability destination.

Delete a private endpoint

Delete a private endpoint and stop routing to it.

Delete a SCIM group mapping

Delete a SCIM group-to-workspace mapping.

Delete a workspace

Delete an existing workspace.

Delete a workspace budget

Remove the budget for a given interval.

Disable a private endpoint

Stop routing to an active endpoint without deleting it.

Download Container File Content

Download raw file content from an OpenRouter container using its canonical container and file IDs.

Download File Content

Download raw content of a server-created file.

Enable a private endpoint

Resume routing to a disabled endpoint.

Exchange authorization code for API key

Exchange an authorization code from the PKCE flow for a user-controlled API key

Exchange a workload identity token

RFC 8693 token exchange.

Generate an image

Generates an image from a text prompt via the image generation router

Get available analytics metrics and dimensions

Returns the available metrics, dimensions, filter operators, and granularities for the analytics query endpoint.

Get a single API key

Get a single API key by hash.

Top apps by token usage

Returns the top public apps on OpenRouter ranked by token usage inside the requested date window, matching the public apps marketplace on openrouter.

Get a batch

Returns a batch with its status and request counts.

List Benchmarks

Unified benchmark endpoint that aggregates scores from multiple benchmark sources (Artificial Analysis, Design Arena, and OpenRouter's own tau-bench, GPQA, and web-search evals).

Get a BYOK provider credential

Get a single bring-your-own-key (BYOK) provider credential by its `id`.

Retrieve a container file

Returns the metadata of a single file in a container.

Get Credits

Tool to get the current API credit balance for the authenticated user.

Get Current Key

Tool to get information about the currently authenticated API key.

Get file metadata

Retrieves metadata for a single file owned by the requesting workspace.

Get Generation

Tool to retrieve a generation result by its unique ID.

Get a guardrail

Get a single guardrail by ID.

Get a model by its slug

Returns full details for a single model identified by its author and slug (e.

Get Models Count

Tool to get the total count of available models on OpenRouter.

OpenRouter access token signing keys

RFC 7517 JWK Set containing the public keys OpenRouter signs access tokens with.

Get an observability destination

Fetch a single observability destination by its UUID.

Get organization settings

Get the settings of the organization associated with the authenticated management key.

Get a preset

Retrieves a preset by its slug with its currently designated version inline.

Get a specific version of a preset

Retrieves a specific version of a preset by its slug and version number.

Get a private endpoint

Get one private endpoint with its upstream configuration and current pricing.

Daily token totals for top 50 models

Returns the top 50 public models per day by total token usage on OpenRouter, plus a single aggregated `other` row per day that sums every model outside that top 50.

Get a SCIM group mapping

Get a SCIM group-to-workspace mapping.

Get SCIM directory sync status

Get SCIM directory sync status.

Cost per session by harness and model

Returns weekly refreshed, aggregated cost-per-session cells for the published harnesses.

Task classification market share

Returns the market-share breakdown of OpenRouter traffic by task classification (e.

Get a server tool

One server tool by canonical name or any accepted alias, with the models that run it natively.

Get user activity grouped by endpoint

Returns user activity data grouped by endpoint for the last 30 (completed) UTC days.

Get Video Content

Download one output from a completed OpenRouter video generation job.

Get Video Generation

Poll a video generation job for its status, outputs, and usage.

Get a workspace

Get a single workspace by ID or slug.

Get a workspace budget

Retrieve the budget for a given interval.

List API keys

List all API keys for the authenticated user.

List Available Models

List available OpenRouter models, optionally filtered by category.

List batches

Lists batches in the workspace of the authenticating API key, newest first.

List BYOK provider credentials

List the bring-your-own-key (BYOK) provider credentials for the authenticated entity's default workspace.

List container files

Lists the files in a container, in lexicographic path order.

List Embedding Models

List available OpenRouter embedding models with properties including architecture, pricing, and capabilities.

List files

Lists files belonging to the workspace of the authenticating API key.

Get stored prompt, completion, and error content for a generation

Get stored prompt, completion, and error content for a generation

List key assignments for a guardrail

List all API key assignments for a specific guardrail.

List member assignments for a guardrail

List all organization member assignments for a specific guardrail.

List guardrails

List all guardrails for the authenticated user.

List endpoints for an image model

Returns the full per-endpoint records for an image model: each endpoint's definitive supported parameters, pricing, and passthrough allowlist.

List image generation models

Lists every image generation model with its top-level supported-parameter superset and a URL to its full per-endpoint records.

List all key assignments

List all API key guardrail assignments for the authenticated user.

List all member assignments

List all organization member guardrail assignments for the authenticated user.

OpenRouter List Model Endpoints

Tool to list endpoints for a specific model.

List observability destinations

List the observability destinations configured for the authenticated entity's default workspace.

List organization members

List all members of the organization associated with the authenticated management key.

List presets

Lists all presets for the authenticated user, ordered by most recently updated first.

List versions of a preset

Lists all versions of a preset, ordered by version number ascending (oldest first).

List private endpoints

List the organization's private endpoints, including drafts.

OpenRouter List Providers

Tool to list all AI model providers available through the OpenRouter API.

List SCIM group mappings

List SCIM group-to-workspace mappings for the organization.

List SCIM groups

List SCIM groups for the organization.

List server tools

Lists every server tool OpenRouter can run on behalf of a model: accepted `tools[].

List User Models

List models filtered by user provider preferences, privacy settings, and guardrails.

List Video Models

List video generation models and their supported capabilities.

List workspace budgets

List all budgets configured for a workspace.

List workspace members

List all members of a workspace.

List workspaces

List all workspaces for the authenticated user.

OpenRouter List ZDR Endpoints

Tool to preview the impact of Zero Data Retention (ZDR) on the available endpoints.

Promote a container file into workspace documents

Copies a file from the container's sandbox prefix into the workspace's durable document storage, so it outlives the container.

Query analytics data

Execute an analytics query with specified metrics, dimensions, filters, and time range.

Rerank Content

Rank text or multimodal documents by relevance to a query.

Submit feedback for a generation

Submit structured feedback on a generation the authenticated user made.

Submit a System One request

Sends state and typed questions to a System One model such as Jev and returns its answers.

Update an API key

Update one of the authenticated account's own API keys.

Update a BYOK provider credential

Update an existing bring-your-own-key (BYOK) provider credential by its `id`.

Update a guardrail

Update an existing guardrail, or materialize an unconfigured workspace default guardrail.

Update an observability destination

Update an existing observability destination.

Update organization settings

Update the settings of the organization associated with the authenticated management key.

Update a private endpoint

Change any of the endpoint fields you own in one call; only the fields present change, and the response is the whole endpoint.

Update a SCIM group mapping

Update a SCIM group mapping role.

Update a workspace

Update an existing workspace by ID or slug.

Upload File

Upload a file for future API calls under the authenticating key's workspace.

Create or update a workspace budget

Create or update the budget for a given interval.

Validate a draft private endpoint

Send a live test request to the draft endpoint using the given workspace's BYOK credential for its provider.

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FAQ

Frequently asked questions

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