How to integrate Holded MCP with Hermes

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 Holded 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.

Holded logoHolded
Api Key

Holded is business management software for invoices, sales documents, services, contacts, groups, and tags. It helps teams keep finance and customer operations organized in one place.

10 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 Holded 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 Holded 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 Holded 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 Holded

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

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

5. Done!

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

The Holded MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Holded account. It provides structured and secure access to your contacts and sales invoices, so your agent can find, create, review, update, and delete business records on your behalf.

  • Contact creation and management: Have your agent create customers, suppliers, leads, debtors, or creditors, then update selected details as they change.
  • Contact search and review: Instruct your agent to find contacts by name, email, phone number, tax information, or external reference and retrieve their complete profiles.
  • Sales invoice creation: Let the agent create sales invoices for existing contacts with the required line items and details.
  • Invoice tracking and review: Direct your agent to find invoices by document number, contact, payment status, issue date, or due date and review their lines, totals, and payment summaries.
  • Record updates and cleanup: Have your agent update selected invoice fields or permanently delete contacts and invoices you no longer need.

Way Forward

With Holded 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 Holded action and event your agent gets out of the box.

Create Contact

Create a customer, supplier, lead, debtor, creditor, or unclassified contact and return its new Holded ID.

Create Invoice

Create a sales invoice for an existing contact and return its ID; this does not send, approve, or record payment for the invoice.

Delete Contact

Permanently delete one contact by ID; linked documents keep display text but lose the live contact association.

Delete Invoice

Permanently delete one invoice and its recorded payments; its document number is not reused.

Find Contacts

Find Holded contacts by name prefix or an exact email, phone, mobile, tax ID, or external ID.

Find Invoices

Find Holded invoices by fuzzy document-number prefix or list them by contact, payment status, issue date, or due date.

Get Contact

Return the complete profile of one contact by its Holded contact ID.

Get Invoice

Return full details, lines, totals, and payment summary for one invoice by its Holded ID.

Update Contact

Safely change selected fields on a contact without clearing unspecified profile data.

Update Invoice

Safely change selected mutable fields on an invoice without clearing unspecified invoice data or altering recorded payments.

FAQ

Frequently asked questions

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

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

Start with Holded.It takes 30 seconds.

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

Start building