# How to integrate Heyreach MCP with Codex ```json { "title": "How to integrate Heyreach MCP with Codex", "toolkit": "Heyreach", "toolkit_slug": "heyreach", "framework": "Codex", "framework_slug": "codex", "url": "https://composio.dev/toolkits/heyreach/framework/codex", "markdown_url": "https://composio.dev/toolkits/heyreach/framework/codex.md", "updated_at": "2026-05-12T10:14:55.066Z" } ``` ## Introduction Codex is one of the most popular coding harnesses out there. And MCP makes the experience even better. With Heyreach MCP integration, you can draft, triage, summarise emails, and much more, all without leaving the terminal or the app, whichever you prefer. ## Also integrate Heyreach with - [OpenAI Agents SDK](https://composio.dev/toolkits/heyreach/framework/open-ai-agents-sdk) - [Claude Agent SDK](https://composio.dev/toolkits/heyreach/framework/claude-agents-sdk) - [Claude Code](https://composio.dev/toolkits/heyreach/framework/claude-code) - [Claude Cowork](https://composio.dev/toolkits/heyreach/framework/claude-cowork) - [OpenClaw](https://composio.dev/toolkits/heyreach/framework/openclaw) - [Hermes](https://composio.dev/toolkits/heyreach/framework/hermes-agent) - [CLI](https://composio.dev/toolkits/heyreach/framework/cli) - [Google ADK](https://composio.dev/toolkits/heyreach/framework/google-adk) - [LangChain](https://composio.dev/toolkits/heyreach/framework/langchain) - [Vercel AI SDK](https://composio.dev/toolkits/heyreach/framework/ai-sdk) - [Mastra AI](https://composio.dev/toolkits/heyreach/framework/mastra-ai) - [LlamaIndex](https://composio.dev/toolkits/heyreach/framework/llama-index) - [CrewAI](https://composio.dev/toolkits/heyreach/framework/crew-ai) ## TL;DR ### Why use Composio? Apart from a managed and hosted MCP server, you will get: - CodeAct: A dedicated workbench that allows GPT to write its code to handle complex tool chaining. Reduces to-and-fro with LLMs for frequent tool calling. - Large tool responses: Handle them to minimise context rot. - Dynamic just-in-time access to 20,000 tools across 1000+ other Apps for cross-app workflows. It loads the tools you need, so GPTs aren't overwhelmed by tools you don't need. ## Connect Heyreach to Codex ### How to install Heyreach MCP in Codex ### Run the setup command Run this command in your terminal to add the Composio MCP server to Codex. ```bash codex mcp add composio --url https://connect.composio.dev/mcp ``` ## What is the Heyreach MCP server, and what's possible with it? The Heyreach MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Heyreach account. It provides structured and secure access to your outreach platform, so your agent can perform actions like managing campaigns, handling leads, creating lists, and automating webhooks on your behalf. - Campaign management and reporting: Retrieve and review all your active, scheduled, or past campaigns, enabling your agent to keep your outreach strategy organized and up to date. - Lead and list operations: Fetch all leads from any list, create new empty lists, and get a full overview of your audience segments—making bulk actions and lead tracking a breeze. - Webhook automation: Set up or delete webhooks programmatically, so your agent can automate notifications and integrate Heyreach data with other tools without manual effort. - LinkedIn account integration: Access and manage all connected LinkedIn accounts, streamlining multi-channel outreach and coordination directly from your AI assistant. - Company and data retrieval: Pull companies from specific lists and get detailed records, helping your agent power richer, more personalized engagement workflows. ## Supported Tools | Tool slug | Name | Description | |---|---|---| | `HEYREACH_ADD_LEADS_TO_LIST_V2` | Add Leads To List V2 | Tool to add leads to a lead list in HeyReach for LinkedIn campaigns. Accepts up to 100 leads per request and returns counts of added, updated, and failed leads. | | `HEYREACH_CHECK_API_KEY` | Check API Key | Tool to check if the API key is valid. Use before making other API calls to confirm authentication. | | `HEYREACH_CREATE_EMPTY_LIST` | Create Empty List | Tool to create an empty list. Use after deciding on the list name and type. | | `HEYREACH_CREATE_TAGS` | Create Tags | Tool to create one or multiple tags for your workspace. Use when you need to organize leads with custom labels. | | `HEYREACH_CREATE_WEBHOOK` | Create Webhook | Tool to create a new webhook. Use when you need programmatic callbacks for HeyReach events after confirming a valid API key. | | `HEYREACH_DELETE_WEBHOOK` | Delete Webhook | Tool to delete an existing webhook. Use when you need to remove callbacks for outdated or unwanted webhooks. | | `HEYREACH_GET_ALL_CAMPAIGNS` | Get All Campaigns | Tool to retrieve all campaigns. Use when you need a paginated list of campaigns for management or reporting. | | `HEYREACH_GET_ALL_LEADS` | Get All Leads | Tool to retrieve all leads in a HeyReach list. Use when you need paginated collection of leads after confirming a valid API key. | | `HEYREACH_GET_ALL_LINKEDIN_ACCOUNTS` | Get All LinkedIn Accounts | Tool to retrieve all LinkedIn accounts. Use when you need a paginated list of LinkedIn accounts after confirming a valid API key. | | `HEYREACH_GET_ALL_LISTS` | Get All Lists | Tool to retrieve all lists. Use when you need a paginated list of lists after confirming a valid API key. | | `HEYREACH_GET_ALL_WEBHOOKS` | Get All Webhooks | Tool to retrieve all webhooks. Use when you need a paginated collection of webhooks after confirming a valid API key. | | `HEYREACH_GET_COMPANIES_FROM_LIST` | Get Companies From List | Tool to get companies from a company list. Use when you need a paginated list of companies after specifying a list ID. | | `HEYREACH_GET_CONVERSATIONS_V2` | Get Conversations V2 | Tool to retrieve paginated LinkedIn conversations with advanced filters. Use when you need to fetch inbox conversations filtered by lead or profile details. | | `HEYREACH_GET_LEAD` | Get Lead | Tool to retrieve detailed information for a lead by profile URL. Use after obtaining the exact LinkedIn profile URL to fetch full lead details. | | `HEYREACH_GET_LISTS_FOR_LEAD` | Get Lists For Lead | Tool to retrieve all lists that contain a specific lead by profile URL. Use when you need to find which lists a lead belongs to. | | `HEYREACH_GET_MY_NETWORK_FOR_SENDER` | Get My Network for Sender | Tool to get the LinkedIn network for a specified sender account. Use when you need to retrieve paginated connections for a sender. | | `HEYREACH_GET_OVERALL_STATS` | Get Overall Stats | Tool to get overall statistics for LinkedIn accounts and campaigns. Use when you need performance metrics including connection requests, messages, replies, and engagement rates for specified date ranges. | | `HEYREACH_GET_WEBHOOK_BY_ID` | Get Webhook By ID | Tool to retrieve a webhook by its ID. Use when you need detailed configuration of a specific webhook after listing or creating it. | | `HEYREACH_UPDATE_WEBHOOK` | Update Webhook | Tool to update an existing webhook’s configuration. Use when you need to modify a webhook's name, URL, event type, campaigns, or activation status after confirming the webhookId. | ## Supported Triggers None listed. ## Creating MCP Server - Stand-alone vs Composio SDK The Heyreach MCP server provides comprehensive access to Heyreach operations through Composio. Once connected, you can perform all major Heyreach actions directly from Codex using natural language commands. ## Complete Code None listed. ## Conclusion ### Conclusion You've successfully integrated Heyreach with Codex using Composio's MCP server. Now you can interact with Heyreach directly from your terminal, VS Code, or the Codex App using natural language commands. Key benefits of this setup: - Seamless integration across CLI, VS Code, and standalone app - Natural language commands for Heyreach operations - Managed authentication through Composio - Access to 20,000+ tools across 1000+ apps for cross-app workflows - CodeAct workbench for complex tool chaining Next steps: - Try asking Codex to perform various Heyreach operations - Explore cross-app workflows by connecting more toolkits - Build automation scripts that leverage Codex's AI capabilities ## How to build Heyreach MCP Agent with another framework - [OpenAI Agents SDK](https://composio.dev/toolkits/heyreach/framework/open-ai-agents-sdk) - [Claude Agent SDK](https://composio.dev/toolkits/heyreach/framework/claude-agents-sdk) - [Claude Code](https://composio.dev/toolkits/heyreach/framework/claude-code) - [Claude Cowork](https://composio.dev/toolkits/heyreach/framework/claude-cowork) - [OpenClaw](https://composio.dev/toolkits/heyreach/framework/openclaw) - [Hermes](https://composio.dev/toolkits/heyreach/framework/hermes-agent) - [CLI](https://composio.dev/toolkits/heyreach/framework/cli) - [Google ADK](https://composio.dev/toolkits/heyreach/framework/google-adk) - [LangChain](https://composio.dev/toolkits/heyreach/framework/langchain) - [Vercel AI SDK](https://composio.dev/toolkits/heyreach/framework/ai-sdk) - [Mastra AI](https://composio.dev/toolkits/heyreach/framework/mastra-ai) - [LlamaIndex](https://composio.dev/toolkits/heyreach/framework/llama-index) - [CrewAI](https://composio.dev/toolkits/heyreach/framework/crew-ai) ## 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. - [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. - [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. - [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. - [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. - [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. - [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. - [Campayn](https://composio.dev/toolkits/campayn) - Campayn is an email marketing platform for creating, sending, and managing campaigns. It helps businesses engage contacts and grow audiences with easy-to-use tools. - [Cardly](https://composio.dev/toolkits/cardly) - Cardly is a platform for creating and sending personalized direct mail to customers. It helps businesses break through the digital clutter by getting real engagement via physical mailboxes. - [ClickSend](https://composio.dev/toolkits/clicksend) - ClickSend is a cloud-based SMS and email marketing platform for businesses. It streamlines communication by enabling quick message delivery and contact management. - [Crustdata](https://composio.dev/toolkits/crustdata) - CrustData is an AI-powered data intelligence platform for real-time company and people data. It helps B2B sales teams, AI SDRs, and investors react to live business signals. - [Curated](https://composio.dev/toolkits/curated) - Curated is a platform for collecting, curating, and publishing newsletters. It streamlines content aggregation and distribution for creators and teams. - [Customerio](https://composio.dev/toolkits/customerio) - Customer.io is a customer engagement platform for targeted messaging across email, SMS, and push. Easily automate, segment, and track communications with your audience. - [Cutt ly](https://composio.dev/toolkits/cutt_ly) - Cutt.ly is a URL shortening service for managing and analyzing links. Streamline your workflows with quick, trackable, and branded short URLs. - [Demio](https://composio.dev/toolkits/demio) - Demio is webinar software built for marketers, offering both live and automated sessions with interactive features. It helps teams engage audiences and optimize lead generation through detailed analytics. ## Frequently Asked Questions ### What are the differences in Tool Router MCP and Heyreach MCP? With a standalone Heyreach MCP server, the agents and LLMs can only access a fixed set of Heyreach tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Heyreach and many other apps based on the task at hand, all through a single MCP endpoint. ### Can I use Tool Router MCP with Codex? Yes, you can. Codex 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 Heyreach tools. ### Can I manage the permissions and scopes for Heyreach while using Tool Router? Yes, absolutely. You can configure which Heyreach 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 Heyreach data and credentials are handled as safely as possible. --- [See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)