# How to integrate Reply io MCP with Atomic Agent ```json { "title": "How to integrate Reply io MCP with Atomic Agent", "toolkit": "Reply io", "toolkit_slug": "reply_io", "framework": "Atomic Agent", "framework_slug": "atomic-agent", "url": "https://composio.dev/toolkits/reply_io/framework/atomic-agent", "markdown_url": "https://composio.dev/toolkits/reply_io/framework/atomic-agent.md", "updated_at": "2026-08-11T13:13:59.905Z" } ``` ## 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 Reply 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 Reply io account. See the [Atomic Agent documentation](https://atomicagent.io/docs/?cta_placement=atomic-agent-docs) for installation instructions. ## Also integrate Reply io with - [OpenAI Agents SDK](https://composio.dev/toolkits/reply_io/framework/open-ai-agents-sdk) - [Claude Agent SDK](https://composio.dev/toolkits/reply_io/framework/claude-agents-sdk) - [Claude Code](https://composio.dev/toolkits/reply_io/framework/claude-code) - [Claude Cowork](https://composio.dev/toolkits/reply_io/framework/claude-cowork) - [Codex](https://composio.dev/toolkits/reply_io/framework/codex) - [OpenClaw](https://composio.dev/toolkits/reply_io/framework/openclaw) - [Hermes](https://composio.dev/toolkits/reply_io/framework/hermes-agent) - [Google ADK](https://composio.dev/toolkits/reply_io/framework/google-adk) - [LangChain](https://composio.dev/toolkits/reply_io/framework/langchain) - [Vercel AI SDK](https://composio.dev/toolkits/reply_io/framework/ai-sdk) - [Mastra AI](https://composio.dev/toolkits/reply_io/framework/mastra-ai) - [LlamaIndex](https://composio.dev/toolkits/reply_io/framework/llama-index) - [CrewAI](https://composio.dev/toolkits/reply_io/framework/crew-ai) - [Pydantic AI](https://composio.dev/toolkits/reply_io/framework/pydantic-ai) - [AutoGen](https://composio.dev/toolkits/reply_io/framework/autogen) ## TL;DR ### How Atomic Agent connects to Reply 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 Reply io to Atomic Agent ### Connect Reply 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 Reply io. It searches Composio for the right tool. - On first use, open the sign-in link returned in the chat. Connect your Reply 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 Reply io MCP server, and what's possible with it? The Reply 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 Reply io account. It provides structured and secure access to your sales engagement platform, so your agent can manage campaigns, handle contacts, organize sequences, and automate routine sales operations on your behalf. - Campaign and sequence management: Effortlessly list, browse, and delete campaigns or sequences to keep your outreach organized and up to date. - Contact and list organization: Let your agent fetch, review, and organize your Reply io contacts and contact lists for targeted sales actions. - Email account administration: Retrieve all connected email accounts or remove outdated ones, making sure your sales tools stay streamlined. - User and access control: Easily remove users or generate unique identifiers for tasks, maintaining security and clarity in your team’s workflow. - Automated data retrieval: Quickly pull up paginated lists of campaigns, sequences, email accounts, or contact lists to inform your sales strategies and next steps. ## Supported Tools | Tool slug | Name | Description | |---|---|---| | `REPLY_IO_ADD_CONTACT_TO_SEQUENCE` | Add Contact to Sequence | Move an existing contact to a sequence in Reply.io. Use this action to enroll contacts in email sequences for automated outreach campaigns. This action allows you to specify where in the sequence to start, whether to remove the contact from their current sequence, and when to begin processing. | | `REPLY_IO_ARCHIVE_SEQUENCE` | Archive Sequence | Tool to archive a sequence. Use when you need to archive an existing sequence without permanently deleting it. | | `REPLY_IO_CLEAR_CONTACT_STATUS` | Clear Contact Status | Tool to clear statuses from contacts. Use when you need to remove specific or all clearable statuses from contacts. | | `REPLY_IO_CONNECT_EXCHANGE_ACCOUNT` | Connect Exchange Account via OAuth | Tool to initiate OAuth connection for an Exchange email account. Use when you need to connect an Exchange account to Reply.io via OAuth flow. Returns the Microsoft OAuth consent page URL where the user should be redirected. | | `REPLY_IO_CONNECT_GMAIL_ACCOUNT` | Connect Gmail Account | Tool to initiate Gmail account connection via OAuth. Returns the OAuth authorization URL where the user should be redirected to grant permissions. | | `REPLY_IO_CREATE_CONTACT` | Create Contact | Tool to create a new contact in Reply.io. Use when adding contacts to your outreach database. | | `REPLY_IO_CREATE_SEQUENCE_STEP` | Create Sequence Step | Tool to add a new step to an existing sequence. Use when you need to build or modify sequence workflows with Email, Call, Task, SMS, WhatsApp, LinkedIn, Condition, or Zapier steps. | | `REPLY_IO_DELETE_CONTACT` | Delete Contact | Tool to delete a contact. Use after confirming the contact exists to remove it permanently. | | `REPLY_IO_DELETE_EMAIL_ACCOUNT` | Delete Email Account | Tool to delete a specific email account. Use when you need to remove an existing email account identified by its ID. | | `REPLY_IO_DELETE_SCHEDULE` | Delete Schedule | Tool to delete a schedule. Use after confirming the schedule exists to remove it permanently. | | `REPLY_IO_DELETE_SEQUENCE` | Delete Sequence | Tool to delete a sequence. Use after confirming the sequence exists to remove it permanently. | | `REPLY_IO_DELETE_USER` | Delete User | Tool to delete a user. Use after confirming the user exists to remove them permanently. | | `REPLY_IO_GENERATE_ULID` | Generate ULID | Generate ULID | | `REPLY_IO_GET_CONTACT_BY_ID` | Get Contact by ID | Tool to retrieve a contact by ID. Use when you have a contact ID and need detailed contact information. | | `REPLY_IO_GET_CONTACT_STATUS` | Get Contact Status | Tool to get contact status. Use when you need to retrieve all current statuses for a contact. | | `REPLY_IO_GET_CURRENT_USER` | Get Current User | Tool to get the current authenticated user's ID. Use when you need to verify API key validity or identify the current user. | | `REPLY_IO_GET_DISCONNECTED_EMAIL_ACCOUNTS` | Reply.io Get Disconnected Email Accounts | Tool to list email accounts that are currently disconnected due to authentication or connection errors. Use when you need to identify and troubleshoot problematic email accounts. | | `REPLY_IO_GET_SEQUENCE_BY_ID` | Get Sequence By ID | Tool to retrieve detailed information about a sequence by its ID. Use when you need to get comprehensive sequence details including settings, email accounts, and workflow steps. | | `REPLY_IO_GET_SEQUENCE_CONTACTS_EXTENDED` | Get Sequence Contacts Extended | Tool to retrieve all contacts enrolled in a sequence with additional details. Use when you need to see contact engagement status, current step, or completion timestamps within a sequence. | | `REPLY_IO_GET_SEQUENCE_STEP_BY_ID` | Get Sequence Step by ID | Tool to retrieve details of a specific sequence step. Use when you need to inspect step configuration including type, delays, execution mode, and type-specific settings. | | `REPLY_IO_LIST_CONTACTS_BASIC` | List Contacts Basic | Tool to list contacts. Use when verifying API access and gathering contact IDs. | | `REPLY_IO_LIST_EMAIL_ACCOUNTS` | Reply.io List Email Accounts | Tool to list all email accounts. Use when you need to retrieve email accounts page by page. | | `REPLY_IO_LIST_LISTS` | Reply.io List Lists | Tool to list all contact lists. Use when you need to retrieve all available lists in your Reply.io account. | | `REPLY_IO_LIST_SEQUENCES` | List Sequences | Tool to retrieve a paginated list of sequences. Use when you need to browse sequences with optional filtering by name. | | `REPLY_IO_LIST_SEQUENCE_STEPS` | List Sequence Steps | Tool to retrieve all steps in a sequence. Use when you need to get the complete list of steps configured for a specific sequence. | | `REPLY_IO_PAUSE_SEQUENCE` | Pause Sequence | Tool to pause a running sequence. Use when you need to temporarily stop a sequence from sending emails or executing steps. | | `REPLY_IO_REMOVE_CONTACT_FROM_SEQUENCE` | Remove Contact From Sequence | Tool to remove a contact from a sequence. Use when you need to stop a contact from receiving further steps in a specific sequence. | | `REPLY_IO_REMOVE_CONTACTS_FROM_SEQUENCE` | Bulk Remove Contacts from Sequence | Tool to bulk remove multiple contacts from a sequence at once. Use when you need to remove several contacts from a sequence efficiently in a single operation. | | `REPLY_IO_SEARCH_CONTACTS` | Search Contacts by Email | Tool to search contacts by email. Use when you need to find existing contact IDs for update tests. | | `REPLY_IO_SET_CONTACT_STATUS` | Set Contact Status | Tool to set the status of one or more contacts. Use when you need to update contact statuses in bulk. | | `REPLY_IO_START_SEQUENCE` | Start Sequence | Tool to start a sequence. Use when you need to activate a sequence that is in New or Paused status. | | `REPLY_IO_UPDATE_CONTACT` | Update Contact | Tool to update an existing contact's information. Use when you need to modify contact details. | | `REPLY_IO_UPDATE_EMAIL_ACCOUNT` | Update Email Account | Tool to update an existing email account with custom SMTP/IMAP settings. Use when you need to modify email account configuration such as sender name, signature, server settings, or daily limits. | ## 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 Reply io from Atomic Agent With your account connected, ask Atomic Agent to work with Reply 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 Reply io MCP Agent with another framework - [OpenAI Agents SDK](https://composio.dev/toolkits/reply_io/framework/open-ai-agents-sdk) - [Claude Agent SDK](https://composio.dev/toolkits/reply_io/framework/claude-agents-sdk) - [Claude Code](https://composio.dev/toolkits/reply_io/framework/claude-code) - [Claude Cowork](https://composio.dev/toolkits/reply_io/framework/claude-cowork) - [Codex](https://composio.dev/toolkits/reply_io/framework/codex) - [OpenClaw](https://composio.dev/toolkits/reply_io/framework/openclaw) - [Hermes](https://composio.dev/toolkits/reply_io/framework/hermes-agent) - [Google ADK](https://composio.dev/toolkits/reply_io/framework/google-adk) - [LangChain](https://composio.dev/toolkits/reply_io/framework/langchain) - [Vercel AI SDK](https://composio.dev/toolkits/reply_io/framework/ai-sdk) - [Mastra AI](https://composio.dev/toolkits/reply_io/framework/mastra-ai) - [LlamaIndex](https://composio.dev/toolkits/reply_io/framework/llama-index) - [CrewAI](https://composio.dev/toolkits/reply_io/framework/crew-ai) - [Pydantic AI](https://composio.dev/toolkits/reply_io/framework/pydantic-ai) - [AutoGen](https://composio.dev/toolkits/reply_io/framework/autogen) ## Related Toolkits - [Aeroleads](https://composio.dev/toolkits/aeroleads) - Aeroleads is a B2B lead generation platform for finding business emails and phone numbers. Grow your sales pipeline faster with powerful prospecting tools. - [Autobound](https://composio.dev/toolkits/autobound) - Autobound is an AI-powered sales engagement platform that crafts hyper-personalized outreach and insights. It helps sales teams boost response rates and close more deals through tailored content and recommendations. - [Better proposals](https://composio.dev/toolkits/better_proposals) - Better Proposals is a web-based tool for crafting and sending professional proposals. It helps teams impress clients and close deals faster with slick, easy-to-use templates. - [Bidsketch](https://composio.dev/toolkits/bidsketch) - Bidsketch is a proposal software that helps businesses create professional proposals quickly and efficiently. It streamlines the proposal process, saving time while boosting client win rates. - [Bolna](https://composio.dev/toolkits/bolna) - Bolna is an AI platform for building conversational voice agents. It helps businesses automate support and streamline interactions through natural, voice-powered conversations. - [Botdog](https://composio.dev/toolkits/botdog) - Botdog is a LinkedIn outreach platform for managing campaigns, leads, messages, analytics, and sending accounts. It helps sales teams run outbound workflows and track performance from one place. - [BotPenguin](https://composio.dev/toolkits/botpenguin) - BotPenguin is an AI chatbot platform for customer messaging, contacts, and conversations. It helps teams manage bot-led support and lead engagement across channels. - [Botsonic](https://composio.dev/toolkits/botsonic) - Botsonic is a no-code AI chatbot builder for easily creating and deploying chatbots to your website. It empowers businesses to offer conversational experiences without writing code. - [Botstar](https://composio.dev/toolkits/botstar) - BotStar is a comprehensive chatbot platform for designing, developing, and training chatbots visually on Messenger and websites. It helps businesses automate conversations and customer interactions without coding. - [Callerapi](https://composio.dev/toolkits/callerapi) - CallerAPI is a white-label caller identification platform for branded caller ID and fraud prevention. It helps businesses boost customer trust while stopping spam, fraud, and robocalls. - [Callingly](https://composio.dev/toolkits/callingly) - Callingly is a lead response management platform that automates immediate call and text follow-ups with new leads. It helps sales teams boost response speed and close more deals by connecting seamlessly with CRMs and lead sources. - [Callpage](https://composio.dev/toolkits/callpage) - Callpage is a lead capture platform that lets businesses instantly connect with website visitors via callback. It boosts lead generation and increases your sales conversion rates. - [Charla](https://composio.dev/toolkits/charla) - Charla is a live chat and AI customer-support platform for property teams. It helps manage guest conversations, property contacts, and support knowledge. - [Chatforma](https://composio.dev/toolkits/chatforma) - Chatforma is a chatbot automation platform for building and managing bots. It helps teams run dialogs, segments, broadcasts, forms, and user updates from one place. - [Clearout](https://composio.dev/toolkits/clearout) - Clearout is an AI-powered service for verifying, finding, and enriching email addresses. It boosts deliverability and helps you discover high-quality leads effortlessly. - [Clientary](https://composio.dev/toolkits/clientary) - Clientary is a platform for managing clients, invoices, projects, proposals, and more. It streamlines client work and saves you serious admin time. - [Convolo ai](https://composio.dev/toolkits/convolo_ai) - Convolo ai is an AI-powered communications platform for sales teams. It accelerates lead response and improves conversion rates by automating calls and integrating workflows. - [Crisp](https://composio.dev/toolkits/crisp) - Crisp is a customer messaging platform for live chat, contacts, helpdesk, and campaigns. It helps support teams manage customer conversations from one shared workspace. - [Delighted](https://composio.dev/toolkits/delighted) - Delighted is a customer feedback platform based on the Net Promoter System®. It helps you quickly gather, track, and act on customer sentiment. - [Docsbot ai](https://composio.dev/toolkits/docsbot_ai) - Docsbot ai is a platform that lets you build custom AI chatbots trained on your documentation. It automates customer support and content generation, saving time and improving response quality. ## Frequently Asked Questions ### What are the differences in Tool Router MCP and Reply io MCP? With a standalone Reply io MCP server, the agents and LLMs can only access a fixed set of Reply io tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Reply 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 Reply io tools. ### Can I manage the permissions and scopes for Reply io while using Tool Router? Yes, absolutely. You can configure which Reply 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 Reply 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)