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How to integrate Weaviate MCP with Hermes

Connect Hermes to Weaviate MCP. Search weaviate collections for api errors, find customer feedback about onboarding issues, and more using natural language, with authentication handled for you.

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Weaviate MCP is a provider-hosted Query Agent for searching Weaviate Cloud collections. It turns natural-language questions into AI-powered collection searches.

2 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 Weaviate 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 Weaviate MCP with

ChatGPTClaude CoworkAtomic Agent

What is Composio Connect?

Composio Connect is a consumer offering that lets anyone plug 1,700+ 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 Weaviate 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 Weaviate

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

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

5. Done!

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

The Weaviate MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Weaviate account. It provides structured and secure access to your Weaviate Cloud collections, so your agent can answer natural-language questions, run AI-powered searches, apply structured filters, perform aggregations, and return matching data on your behalf.

  • Natural-language questions: Have your agent ask questions about your Weaviate collections and turn them into searches or aggregations before providing a final answer.
  • Semantic collection search: Let the agent find relevant collection data using AI-powered semantic search rather than relying only on exact keyword matches.
  • Structured filtering: Direct your agent to combine semantic search with structured filters to narrow results to the data that matches your criteria.
  • Data aggregation: Instruct your agent to generate aggregations from your collection data when answering questions that require grouped or calculated results.
  • Matching result retrieval: Have your agent return the Weaviate objects that match a search, so you can work directly with the relevant collection data.

Way Forward

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

Query agent ask

Ask Mode transforms your query into actionable searches or aggregations, and then provides a final answer to the question.

Query agent search

Search Mode combines AI-powered semantic search with structured filtering and returns the matching Weaviate objects directly.

FRAMEWORKS

How to build Weaviate MCP Agent with another framework

ChatGPT logo

ChatGPT

Use Weaviate MCP with ChatGPT

Claude Cowork logo

Claude Cowork

Use Weaviate MCP with Claude Cowork

Atomic Agent logo

Atomic Agent

Use Weaviate MCP with Atomic Agent

FAQ

Frequently asked questions

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

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

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