How to integrate Sender 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 Sender 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 Sender 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 Sender 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 Sender

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

4. Done. You're all set with a new Sender 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 Sender or request any Sender-related task. It will prompt you to authenticate and authorize access.

5. Done!

What is the Sender MCP server, and what's possible with it?

The Sender MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Sender account. It provides structured and secure access so your agent can perform Sender operations on your behalf.

Supported Tools & Triggers

Tools
Create FieldTool to create a new custom subscriber field in Sender.
Create Or Update SubscriberTool to create a new subscriber or update an existing one in Sender.
Get All FieldsTool to retrieve a list of all custom subscriber fields configured in the Sender.
Get All WorkflowsTool to retrieve a list of all automation workflows in the Sender account.
Get Campaign By IDTool to retrieve a specific campaign by its unique ID from Sender.
Get Group By IDTool to retrieve a specific subscriber group by its unique ID from Sender.
Get Subscriber By EmailTool to retrieve a specific subscriber by their email address from Sender.
Get Subscriber By IDTool to retrieve a specific subscriber by their unique ID from Sender.
Update Subscriber FieldsTool to update custom fields and information for an existing subscriber in Sender.

Way Forward

With Sender 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 Sender MCP Agent with another framework

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OpenAI Agents SDK

Use Sender MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Sender MCP with Claude Agent SDK

Claude Code logo

Claude Code

Use Sender MCP with Claude Code

Codex logo

Codex

Use Sender MCP with Codex

OpenClaw logo

OpenClaw

Use Sender MCP with OpenClaw

CLI logo

CLI

Use Sender MCP with CLI

Google ADK logo

Google ADK

Use Sender MCP with Google ADK

LangChain logo

LangChain

Use Sender MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Sender MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Sender MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Sender MCP with LlamaIndex

CrewAI logo

CrewAI

Use Sender MCP with CrewAI

FAQ

What are the differences in Tool Router MCP and Sender MCP?

With a standalone Sender MCP server, the agents and LLMs can only access a fixed set of Sender tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Sender 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 Sender tools.

Can I manage the permissions and scopes for Sender while using Tool Router?

Yes, absolutely. You can configure which Sender 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 Sender data and credentials are handled as safely as possible.

Used by agents from

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

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