How to integrate Nango MCP with Atomic Agent

Connect Atomic Agent to Nango MCP. List all connected crm accounts, trigger manual sync with salesforce provider, and more using natural language, with authentication handled for you.

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Nango is a unified API platform that connects to 250+ SaaS apps across CRM, HR, and accounting. Streamline integrations with one API and simplify data sync across your business tools.

24 Tools

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 Nango.

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 Nango account. See the Atomic Agent documentation for installation instructions.

Also integrate Nango with

How Atomic Agent connects to Nango

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 Nango to Atomic Agent

  1. Sign up or sign in to the Composio dashboard. Copy your API key.
  2. 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.
  3. Ask Atomic Agent to do something in Nango. It searches Composio for the right tool.
  4. On first use, open the sign-in link returned in the chat. Connect your Nango 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 Nango MCP server, and what's possible with it?

The Nango MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Nango account. It provides structured and secure access to your integrations, so your agent can perform actions like triggering syncs, managing connections, listing providers, and executing workflow actions across 250+ external APIs on your behalf.

  • Connection management and discovery: Effortlessly list all your existing Nango connections, view metadata, or retrieve connection information without exposing sensitive credentials.
  • Provider information and browsing: Ask your agent to list all available providers or fetch detailed configuration info for a specific provider, making it easy to discover and set up new integrations.
  • Triggering workflow actions: Direct your agent to execute custom workflow actions by specifying the connection, provider, and action identifiers—unlocking advanced automation across connected platforms.
  • Manual sync initiation: Have your agent trigger sync processes for any established connection, ensuring your data stays up-to-date across all integrated services.
  • Script configuration retrieval: Let your agent fetch Nango scripts configuration and triggers, enabling more tailored and automated integration flows.

Use Nango from Atomic Agent

With your account connected, ask Atomic Agent to work with Nango in natural language. You can connect more apps through the same Composio integration as you need them.

Visit the Atomic Agent website or inspect the Atomic Agent source code.

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 for the current limits that apply to your connection.

TOOLS

Supported Tools

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

Trigger Nango Action

Trigger a Nango action to execute a workflow or operation.

Add Connection

Tool to add a connection with existing credentials to Nango.

List Connections

List all Nango connections without credentials.

Create Connect Session

Tool to create a new connect session with a 30-minute lifespan for enabling connection creation via Connect UI.

Create Integration

Tool to create a new integration in Nango.

Delete Connection

Tool to delete a specific Nango connection.

Delete Integration

Tool to delete a specific integration by its unique key.

Edit Connection

Tool to edit a connection's tags and metadata.

Get Connection with Credentials

Retrieve a specific connection with its credentials.

Get Environment Variables

Tool to retrieve environment variables from the Nango dashboard.

Get Integration

Retrieve detailed configuration for a specific Nango integration by its unique key.

Proxy GET Request

Tool to make a GET request with Nango's Proxy to forward requests to external APIs while managing authentication.

Get Sync Status

Tool to get the status of specified sync(s) for a connection or all connections.

List Connections

Tool to list all connections without credentials.

List Integrations

Tool to retrieve a list of all configured integrations.

Get Provider Details

Retrieve detailed configuration for a specific Nango provider by its unique key.

List Providers

Tool to retrieve a list of all available providers.

Proxy PUT Request

Tool to make a PUT request with the Nango Proxy to forward requests to external APIs while managing authentication.

Reconnect Session

Create a new connect session to reconnect to a specific integration.

Get Integration Functions Configuration

Retrieve all integration functions configuration from Nango.

Set Connection Metadata

Tool to set custom metadata for one or more Nango connections.

Trigger Sync

Tool to trigger sync process(es) manually.

Update Connection Metadata

Tool to edit custom metadata for one or multiple connections.

Update Integration

Tool to update an existing integration's configuration.

FAQ

Frequently asked questions

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

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 Nango tools.

Yes, absolutely. You can configure which Nango 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.

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 Nango data and credentials are handled as safely as possible.

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