# How to integrate Customer.io MCP with Atomic Agent ```json { "title": "How to integrate Customer.io MCP with Atomic Agent", "toolkit": "Customer.io MCP", "toolkit_slug": "customerio_mcp", "framework": "Atomic Agent", "framework_slug": "atomic-agent", "url": "https://composio.dev/toolkits/customerio_mcp/framework/atomic-agent", "markdown_url": "https://composio.dev/toolkits/customerio_mcp/framework/atomic-agent.md", "updated_at": "2026-10-04T17:26:36.099Z" } ``` ## 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 Customer.io. 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 Customer.io account. See the [Atomic Agent documentation](https://atomicagent.io/docs/?cta_placement=atomic-agent-docs) for installation instructions. ## Also integrate Customer.io MCP with - [ChatGPT](https://composio.dev/toolkits/customerio_mcp/framework/chatgpt) - [Claude Cowork](https://composio.dev/toolkits/customerio_mcp/framework/claude-cowork) - [Hermes](https://composio.dev/toolkits/customerio_mcp/framework/hermes-agent) ## TL;DR ### How Atomic Agent connects to Customer.io 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 Customer.io MCP to Atomic Agent ### Connect Customer.io 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 Customer.io. It searches Composio for the right tool. - On first use, open the sign-in link returned in the chat. Connect your Customer.io 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 Customer.io MCP server, and what's possible with it? The Customer.io MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Customer.io account. It provides structured and secure access to your people, campaigns, broadcasts, and workspace configuration, so your agent can read customer data, manage campaigns, update broadcasts, adjust workspace settings, and remove resources on your behalf. - People management: Have your agent read and update people in Customer.io to keep customer information current. - Campaign operations: Let the agent review, create, and update campaigns based on your instructions. - Broadcast management: Direct your agent to inspect, create, or modify broadcasts for your messaging work. - Workspace configuration: Instruct your agent to read and update supported Customer.io workspace settings. - Guided tasks and cleanup: Have your agent consult Customer.io task instructions, check the active authentication state, and delete supported resources you no longer need. ## Supported Tools | Tool slug | Name | Description | |---|---|---| | `CUSTOMERIO_MCP_CIO_AUTH_STATUS` | Cio auth status | Show the active authentication state. Reports the authenticated user and account, the workspaces the current OAuth token is allowed to access, and whether an agent service-account JWT can be minted. Use this to diagnose auth errors. | | `CUSTOMERIO_MCP_CIO_DELETE_API` | Cio delete api | Delete a resource via the Customer.io API (DELETE only). Always run with dry_run first to preview. Use cio_schema to find the correct path. | | `CUSTOMERIO_MCP_CIO_PRIME` | Cio prime | Print LLM-ready instructions for using the Customer.io API. ALWAYS call this first in a new task — it contains the authoritative, version-specific rules for how to drive the API via the other cio_* tools. | | `CUSTOMERIO_MCP_CIO_READ_API` | Cio read api | Read from the Customer.io API (GET only). Use cio_schema first to find the correct path and placeholders. Workspace routing is enforced server-side via the caller's OAuth token. | | `CUSTOMERIO_MCP_CIO_SCHEMA` | Cio schema | Introspect the Customer.io API schema. Use this to discover endpoints before calling cio_read_api / cio_write_api / cio_delete_api — never guess paths or field names. Pass no query to list resources; pass a resource name ('campaigns') to list its endpoints; pass 'resource.method' ('campaigns.list'), 'METHOD /path', or '/path' for endpoint detail. | | `CUSTOMERIO_MCP_CIO_SKILLS_LIST` | Cio skills list | List available agent skills — task-specific instruction manuals maintained by Customer.io (routing rules, required params, multi-step workflows). | | `CUSTOMERIO_MCP_CIO_SKILLS_READ` | Cio skills read | Read the full content of a specific agent skill. Paths look like 'campaigns' for the main skill or 'campaigns/examples.md' for a sub-file — see cio_skills_list for available paths. | | `CUSTOMERIO_MCP_CIO_WRITE_API` | Cio write api | Write to the Customer.io API (POST, PUT, or PATCH). Always run with dry_run first to preview. Use cio_schema to find the correct path, method, and body shape. | ## 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 Customer.io from Atomic Agent With your account connected, ask Atomic Agent to work with Customer.io 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 Customer.io MCP Agent with another framework - [ChatGPT](https://composio.dev/toolkits/customerio_mcp/framework/chatgpt) - [Claude Cowork](https://composio.dev/toolkits/customerio_mcp/framework/claude-cowork) - [Hermes](https://composio.dev/toolkits/customerio_mcp/framework/hermes-agent) ## Related Toolkits - [Reddit](https://composio.dev/toolkits/reddit) - Reddit is a social news platform with thriving user-driven communities (subreddits). It's the go-to place for discussion, content sharing, and viral marketing. - [Facebook](https://composio.dev/toolkits/facebook) - Facebook is a social media and advertising platform for businesses and creators. It helps you connect, share, and manage content across your public Facebook Pages. - [Linkedin](https://composio.dev/toolkits/linkedin) - LinkedIn is a professional networking platform for connecting, sharing content, and engaging with business opportunities. It's the go-to place for building your professional brand and unlocking new career connections. - [Active campaign](https://composio.dev/toolkits/active_campaign) - ActiveCampaign is a marketing automation and CRM platform for managing email campaigns, sales pipelines, and customer segmentation. It helps businesses engage customers and drive growth through smart automation and targeted outreach. - [ActiveTrail](https://composio.dev/toolkits/active_trail) - ActiveTrail is a user-friendly email marketing and automation platform. It helps you reach subscribers and automate campaigns with ease. - [Adobe Marketing Agent MCP](https://composio.dev/toolkits/adobe_marketing_agent_mcp) - Adobe Marketing Agent MCP is Adobe's hosted MCP service that exposes marketing context, preferences, and agent capabilities. Use it to provide agents with campaign, audience, and analytics context via a managed integration. - [Ahrefs](https://composio.dev/toolkits/ahrefs) - Ahrefs is an SEO and marketing platform for site audits, keyword research, and competitor insights. It helps you improve search rankings and drive organic traffic. - [AimTell](https://composio.dev/toolkits/aimtell) - AimTell is a web push notification platform for managing websites, subscribers, campaigns, segments, and delivery analytics. Use it to send targeted browser notifications and measure engagement across your web push campaigns. - [Amcards](https://composio.dev/toolkits/amcards) - AMCards lets you create and mail personalized greeting cards online. Build stronger customer relationships with easy, automated card campaigns. - [AWeber](https://composio.dev/toolkits/aweber) - AWeber is an email marketing platform for creating campaigns, lists, and landing pages. It helps businesses automate email outreach and measure subscriber engagement. - [Beamer](https://composio.dev/toolkits/beamer) - Beamer is a news and changelog platform for in-app announcements and feature updates. It helps companies boost user engagement by sharing news where users are most active. - [Beehiiv](https://composio.dev/toolkits/beehiiv) - Beehiiv is a newsletter platform for creating and managing publications and subscribers. It helps grow audience engagement and monetize your mailing list. - [Benchmark email](https://composio.dev/toolkits/benchmark_email) - Benchmark Email is a platform for creating, sending, and tracking email campaigns. It's built to help you engage audiences and analyze results—all in one place. - [Bigmailer](https://composio.dev/toolkits/bigmailer) - BigMailer is an email marketing platform for managing multiple brands with white-labeling and automation. It helps teams streamline campaigns and simplify integration with Amazon SES. - [Bitly](https://composio.dev/toolkits/bitly) - Bitly is a link management platform for shortening, customizing, sharing, and tracking links and QR codes. It helps teams create branded links and measure engagement across campaigns. - [BlueFox Email](https://composio.dev/toolkits/bluefox_email) - BlueFox Email is an email API for managing contacts, subscriber lists, and sending transactional and triggered messages. Use it to reliably send transactional and triggered emails and manage subscribers at scale. - [Brandfetch](https://composio.dev/toolkits/brandfetch) - Brandfetch is an API that delivers company logos, colors, and visual branding assets. It helps marketers and developers keep brand visuals consistent everywhere. - [Braze](https://composio.dev/toolkits/braze) - Braze is a customer engagement platform for managing user data, messaging, campaigns, and analytics. Use it to deliver targeted, multi-channel messaging and analyze campaign performance. - [Brevo](https://composio.dev/toolkits/brevo) - Brevo is an all-in-one email and SMS marketing platform for transactional messaging, automation, and CRM. It helps businesses engage customers and streamline communications through powerful campaign tools. - [Buffer](https://composio.dev/toolkits/buffer) - Buffer is a social media management platform for planning, creating, scheduling, and publishing posts across connected channels. It helps teams keep content organized and publish consistently without jumping between social apps. ## Frequently Asked Questions ### What are the differences in Tool Router MCP and Customer.io MCP? With a standalone Customer.io MCP server, the agents and LLMs can only access a fixed set of Customer.io tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Customer.io 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 Customer.io tools. ### Can I manage the permissions and scopes for Customer.io while using Tool Router? Yes, absolutely. You can configure which Customer.io 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 Customer.io data and credentials are handled as safely as possible. --- [See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)