How to integrate Chaser 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 Chaser 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 Chaser 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 Chaser 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 Chaser

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

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

5. Done!

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

The Chaser MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Chaser account. It provides structured and secure access to your accounts receivable data, so your agent can create and manage invoices, update customer records, generate credit notes, and retrieve key financial details on your behalf.

  • Automated invoice management: Create, update, and track invoices programmatically—making it easy for your agent to help you stay on top of accounts receivable.
  • Customer information handling: Retrieve, create, and update customer records so your assistant can help onboard new clients or keep customer details up-to-date.
  • Credit note processing: Generate and fetch credit notes, allowing your agent to handle adjustments and reconciliations quickly and accurately.
  • Organization data retrieval: Access up-to-date information about your organization, including IDs, currency settings, and compliance details, for seamless financial operations.
  • Efficient accounts review: Instantly pull lists of customers or credit notes to review outstanding balances, statuses, and financial health—all through conversational prompts.

Supported Tools & Triggers

Tools
Create Contact PersonTool to create a new contact person for a customer in Chaser.
Create InvoiceTool to create a new invoice record in the organization.
Create OverpaymentCreates a new overpayment record in Chaser for tracking customer overpayments.
Delete Contact PersonTool to delete a contact person from a customer record in Chaser.
Get Contact Person by IDTool to get a specific contact person by ID for a customer.
Get Credit Note by IDRetrieve detailed information for a specific credit note by its ID.
Get Credit NotesRetrieves a list of credit notes from Chaser.
Get Current OrganisationTool to retrieve information about the current organisation associated with the API credentials.
Get Customer by IDRetrieve detailed information for a specific customer by their Chaser customer ID.
Get CustomersTool to retrieve a list of all customers associated with the organization.
Get Invoice by IDTool to retrieve detailed information for a specific invoice by its ID.
Get OrganizationTool to retrieve information about the connected organizations.
Get OverpaymentRetrieve detailed information for a specific overpayment by its ID.
Get StatusTool to check the status of the Chaser API.
List Contact PersonsTool to retrieve contact persons for a specific customer.
List InvoicesTool to retrieve invoices with pagination and filtering.
List OverpaymentsTool to retrieve overpayments from Chaser with pagination and filtering.
Create Credit NoteCreates a new credit note record in Chaser for tracking customer credits.
Create CustomerTool to create a new customer record in Chaser.
Update Credit NoteUpdate an existing credit note in Chaser.
Update CustomerTool to update an existing customer's information using their unique Chaser customer ID.
Update InvoiceUpdate an existing invoice in Chaser by its internal ID.
Update Contact PersonTool to update a contact person for a customer in Chaser.
Update OverpaymentTool to update an overpayment record in Chaser.
Upload Invoice PDFUpload a PDF file to an existing invoice in Chaser.
Bulk Upsert CustomersTool to bulk upsert up to 100 customers in a single operation.
Bulk Upsert Contact PersonsTool to bulk insert or update contact persons for a customer.
Bulk Upsert Credit NotesTool to bulk upsert up to 100 credit notes in a single request.
Bulk Upsert InvoicesTool to bulk upsert up to 100 invoices in a single request.
Bulk Upsert OverpaymentsTool to bulk upsert up to 100 overpayments in Chaser, matching by overpayment_id.

Way Forward

With Chaser 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.

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FAQ

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

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

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

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

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