How to integrate Reply io MCP with Hermes

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Introduction

Hermes is a 24/7 autonomous agent that lives on your computer or server — it remembers what it learns and evolves as your usage grows.

This guide explains the easiest and most robust way to connect your Reply io account to Hermes. You can do this through either Composio Connect CLI or Composio Connect MCP. For personal use we recommend the CLI, but you won't go wrong with MCP either.

Also integrate Reply io with

What is Composio Connect?

Composio Connect is a consumer offering that lets anyone plug 1,000+ applications directly into their agent harness — including Hermes. It can:

  • Search and load tools from relevant toolkits on-demand, reducing context usage.
  • Chain multiple tools to accomplish complex workflows via a remote workbench, without excessive back-and-forth with the LLM.
  • Manage app authentication end-to-end with zero manual overhead.

Integrating Reply io with Hermes

Using Composio Connect CLI

1. Install the Composio CLI

Run the install script directly, or paste https://composio.dev/hermes into your Hermes chat box to have it installed for you.

bash
curl -fsSL https://composio.dev/install | bash
Hermes authenticating with Composio

2. Authenticate

Once the CLI is installed, ask Hermes to authenticate with Composio.

3. Connect to Reply io

Ask your agent to connect to Reply io, or simply request any Reply io-related task. Hermes will prompt you to authenticate and authorize access.

4. Done. You're all set with a new Reply io connection.

Using Composio Connect MCP

1. Get your MCP URL and API Key

Go to dashboard.composio.dev and copy your Connect MCP URL and API key.

Copy MCP URL and API key from Composio dashboard

2. Open the Hermes config file

bash
nano ~/.hermes/config.yaml

3. Add the Composio Connect MCP server

bash
mcp_servers:
  composio:
    url: "https://connect.composio.dev/mcp"
    headers:
      x-consumer-api-key: "YOUR_COMPOSIO_API_KEY"
    connect_timeout: 60
    timeout: 180

Save with Ctrl + O, Enter, then exit with Ctrl + X.

4. Restart your Hermes agent

Once restarted, ask your agent to connect to Reply io or request any Reply io-related task. It will prompt you to authenticate and authorize access.

5. Done!

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 & Triggers

Tools
Delete CampaignTool to delete a campaign by id.
Delete Email AccountTool to delete a specific email account.
Delete SequenceTool to delete a sequence.
Delete UserTool to delete a user.
Generate ULIDTool to generate a ulid string.
List CampaignsTool to list all campaigns (sequences).
Reply.io List ContactsTool to list all contacts.
Reply.io List Email AccountsTool to list all email accounts.
Reply.io List ListsTool to list all contact lists.
List SequencesTool to retrieve a paginated list of sequences.
Search Contacts by EmailTool to search contacts by email.

Way Forward

With Reply io connected, Hermes can now act on your behalf whenever it detects a relevant task or you ask it to.

From here, you can extend Hermes further:

  • Connect more apps: Calendar, Slack, Notion, Linear, and hundreds of others are available through the same Composio Connect setup. Each new integration compounds what Hermes can do for you.
  • Build workflows across tools: Once multiple apps are connected, Hermes can chain actions together — turn an email into a calendar invite, a Slack message into a Linear ticket, or a meeting note into a follow-up draft.
  • Let it learn your patterns: The more you use Hermes, the better it gets at anticipating how you'd handle recurring tasks. Give it feedback on drafts and decisions, and it will adapt.

If you run into trouble or want to share what you've built, join the community or check out the Docs for deeper configuration options.

How to build Reply io MCP Agent with another framework

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Reply io MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Reply io MCP with Claude Agent SDK

Claude Code logo

Claude Code

Use Reply io MCP with Claude Code

Codex logo

Codex

Use Reply io MCP with Codex

OpenClaw logo

OpenClaw

Use Reply io MCP with OpenClaw

CLI logo

CLI

Use Reply io MCP with CLI

Google ADK logo

Google ADK

Use Reply io MCP with Google ADK

LangChain logo

LangChain

Use Reply io MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Reply io MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Reply io MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Reply io MCP with LlamaIndex

CrewAI logo

CrewAI

Use Reply io MCP with CrewAI

FAQ

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 Hermes?

Yes, you can. Hermes 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.

Used by agents from

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Letta
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Context
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glean
HubSpot
Agent.ai
Altera
DataStax
Entelligence
Rolai
Context
Letta
glean
HubSpot
Agent.ai
Altera
DataStax
Entelligence
Rolai

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