SIGN UPLOG IN
X (Twitter)LinkedInGitHubDiscordYouTube

How to integrate Kernel MCP with Hermes

Connect Hermes to Kernel MCP. Launch a cloud browser for checkout testing, run playwright checks on a web app, and more using natural language, with authentication handled for you.

Get started for freeGet a demo
Kernel logoKernel
Api Key

Kernel is a browser automation platform with cloud browsers, computer controls, Playwright execution, and session replays. It provides persistent browser profiles and reliable infrastructure for browser-based workflows.

35 Tools

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 Kernel 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 Kernel with

ChatGPTClaude CoworkAtomic Agent

What is Composio Connect?

Composio Connect is a consumer offering that lets anyone plug 1,500+ 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 Kernel 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 Kernel

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

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

5. Done!

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

The Kernel MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Kernel account. It provides structured and secure access to cloud browsers, persistent profiles, computer controls, Playwright execution, browser network requests, screenshots, and session replays, so your agent can create browser sessions, interact with websites, run Playwright workflows, preserve browser state, and record sessions on your behalf.

  • Cloud browser control: Have your agent create, update, inspect, and delete browser sessions, then click, scroll, type text, press keys, move the mouse, and capture screenshots.
  • Playwright browser automation: Direct your agent to run JavaScript or TypeScript with Playwright to navigate pages, interact with forms, submit actions, and automate browser workflows.
  • Persistent browser profiles: Let the agent create, save, download, rename, list, and delete browser profiles so browser state can be reused across sessions.
  • Authenticated browser requests: Instruct your agent to send read-only or state-changing HTTP requests through a browser while using its cookies, headers, TLS fingerprint, and proxy settings.
  • Session recording and extensions: Have your agent start and stop browser replays, list and retrieve recordings, and upload unpacked Chromium extensions to a running browser.

Way Forward

With Kernel 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.

TOOLS

Supported Tools

Every Kernel action and event your agent gets out of the box.

Batch Computer Actions

Execute 1-100 computer actions sequentially in a Kernel browser, stopping on the first error.

Browser Curl

Send a read-only GET, HEAD, or OPTIONS request through a Kernel browser's network stack, inheriting its cookies, TLS fingerprint, proxy settings, and default headers.

Browser HTTP Request

Send a state-changing POST, PUT, PATCH, or DELETE request through a Kernel browser's network stack, inheriting its cookies, TLS fingerprint, proxy settings, and default headers.

Click

Click at browser viewport coordinates with an optional mouse button, click phase, modifiers, and repetition count.

Create Browser

Create a Kernel browser session; defaults to a headless browser with a 60-second inactivity timeout.

Create Profile

Create an empty persistent browser profile, optionally with a unique name, for reuse by later browser sessions.

Delete Browser

Permanently end and delete a Kernel browser session by ID or name.

Delete Playwright Executor

Stop and permanently delete a named, non-default Playwright executor from a Kernel browser.

Delete Profile

Permanently delete a browser profile by ID or name.

Download Profile

Download a profile's stored browser state.

Drag Mouse

Drag a mouse button through an ordered path of browser viewport coordinates, with optional timing, linear-step, and modifier controls.

Execute Playwright

Execute arbitrary TypeScript or JavaScript with Playwright access to the browser; the code may navigate, mutate pages, submit forms, or cause irreversible external effects.

Get Browser

Get safe operational details for one browser session by ID or name, optionally including a deleted session.

Get Mouse Position

Get the current mouse cursor coordinates in a Kernel browser session.

Get Profile

Get one browser profile by its ID or exact name.

Get Replay

Download a completed browser replay as MP4.

List Browsers

List browser sessions, optionally filtered by lifecycle state, search text, tags, or region, one offset page at a time.

List Playwright Executors

List the default and named Playwright executors for a Kernel browser, including whether each is busy and its owned tab when available.

List Profiles

List browser profiles, optionally filtered by substring or exact name, one offset page at a time.

List Replays

List replay recordings for a headful browser session without returning signed viewer URLs.

Move Mouse

Move the cursor to browser viewport coordinates, optionally using a timed human-like path and held modifier keys.

Press Key

Press an ordered sequence of X11 keys or key chords in a browser, optionally holding modifiers or holding the sequence for a duration.

Read Clipboard

Read the current text from a Kernel browser session's clipboard.

Rename Profile

Rename a Kernel browser profile by ID or exact name.

Restart Default Playwright Executor

Restart a Kernel browser's reserved default Playwright executor.

Save Browser Profile

Save a running browser's current state to exactly one destination profile ID or name, creating a named profile when needed and overwriting an existing destination.

Scroll

Scroll horizontally or vertically at browser viewport coordinates, optionally while holding modifier keys.

Set Cursor Visibility

Hide or show the cursor in a Kernel browser session.

Start Replay

Start recording a headful Kernel browser session and return its replay identifier and recording metadata without exposing its signed viewer URL.

Stop Replay

Stop an active replay recording for a Kernel browser identified by ID or name.

Take Screenshot

Capture the full browser viewport or a rectangular region as a PNG download.

Type Text

Type text into the currently focused browser element with an optional per-keystroke delay.

Update Browser

Update mutable settings on an existing Kernel browser session.

Upload Browser Extensions

Upload and activate one or more unpacked Chromium extension ZIP archives in an existing running browser.

Write Clipboard

Write text to the system clipboard of a Kernel browser session.

FRAMEWORKS

How to build Kernel MCP Agent with another framework

ChatGPT logo

ChatGPT

Use Kernel MCP with ChatGPT

Claude Cowork logo

Claude Cowork

Use Kernel MCP with Claude Cowork

Atomic Agent logo

Atomic Agent

Use Kernel MCP with Atomic Agent

FAQ

Frequently asked questions

With a standalone Kernel MCP server, the agents and LLMs can only access a fixed set of Kernel tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Kernel and many other apps based on the task at hand, all through a single MCP endpoint.

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 Kernel tools.

Yes, absolutely. You can configure which Kernel 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.

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 Kernel data and credentials are handled as safely as possible.

Start with Kernel.It takes 30 seconds.

Managed auth, hosted MCP servers, and every Kernel tool your agent needs.Free to start.

Start building