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How to connect Ceramic to Claude

Connect Claude Web, Desktop and Cowork to Ceramic MCP. Search public web for 'ai regulation' updates, summarize latest search results on quantum computing, and more using natural language, with authentication handled for you.

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Ceramic Search is a lexical web search service that returns relevant public web content for keyword queries. Use it to surface timely web snippets and sources your agents can cite and act on.

1 Tools

Introduction

Claude is Anthropic's AI assistant, available on the web, in the desktop app, and on mobile. Cowork is its agent for knowledge work, and it runs on all of those surfaces too. Connected to your apps, Claude can work with your files and services to accomplish complex tasks on your behalf.

This guide walks you through the easiest and most secure way to connect your Ceramic account to Claude via Composio Connect, enabling it to search public web for 'AI regulation' updates, summarize latest search results on quantum computing, retrieve and cite sources for vaccine efficacy, and more such actions on your behalf without compromising your account security.

Setup is the same on Claude Web, Desktop, and Cowork, and you only need to do it once. The connector is tied to your account, so it's available in all three.

Also integrate Ceramic with

ChatGPT WorkHermes

Connecting Ceramic to Claude Web, Desktop, and Cowork

1. Open Customize

In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top.

Claude Desktop connectors screen with Add custom connector selected

2. Add the Composio MCP server

Click Add custom connector and paste in the Composio MCP server URL:

bash
https://connect.composio.dev/mcp
Add custom connector dialog with Composio MCP server URL

3. Authorize in your browser

Click Connect. You'll be redirected to a browser window where you can authorize Composio to continue.

Composio authorization screen for Claude Web, Desktop, and Cowork

4. Connect your Ceramic account

Back in Claude, ask it to connect to Ceramic or give it any Ceramic-related task.

For example, ask Claude to:

  • "Search public web for 'AI regulation' updates"
  • "Summarize latest search results on quantum computing"
  • "Retrieve and cite sources for vaccine efficacy"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Claude, and your Ceramic account is ready to use.

What is the Ceramic Claude Connector, and what's possible with it?

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

Troubleshooting

1. Why does Claude not use the Composio connector for Ceramic?

The connector can show as connected, but Claude must use it in each Ceramic conversation.

  • Click + at the lower left of the chat, or type /.
  • Hover Connectors.
  • Turn on Composio.
  • Ask Claude to connect to Ceramic again.

2. Why does Claude show an MCP server error before Ceramic connects?

Claude can show Couldn't reach the MCP server or Authorization with the MCP server failed when you add the connector for Ceramic.

  • Check that the connector URL is https://connect.composio.dev/mcp.
  • Connectors run from Anthropic's cloud, so your device network is usually not the problem.
  • Add the connector again from Customize > Connectors, then ask Claude to connect Ceramic.
  • If it fails again, send the error and the ofid_ reference id to support@composio.dev.

3. Why does the Ceramic authorization link not work?

The Composio connector is one server. Your Ceramic account connects separately when Claude asks for it.

  • If the browser does not open, or the link expires, ask Claude to retry the Ceramic connection.
  • Composio creates a fresh Ceramic authorization link.
  • Open that link in your browser and finish the Ceramic sign-in.

4. Why do Ceramic actions fail after they worked before?

The Ceramic connection can expire or lose permission.

  • Ask Claude to inspect the Ceramic connection.
  • If the connection is unhealthy, disconnect it when Claude prompts you.
  • Reconnect the Ceramic account and retry the action.
  • If Claude shows a permission prompt, approve it before Claude changes data in Ceramic.
  • If the action still fails with a permission error, check that the connected account has that permission in Ceramic itself.

5. How do I switch to a different Ceramic account?

Claude can manage the Ceramic connection for you.

  • Ask Claude to disconnect or delete the current Ceramic account.
  • Ask Claude to connect Ceramic again.
  • Open the new Composio authorization link for Ceramic.
  • Sign in with the other Ceramic account in the browser.
  • After the account connects, ask Claude to retry the Ceramic task.

6. Why is my Ceramic connection missing in Claude Desktop or on a Team plan?

The connector belongs to your Claude account, so your Ceramic connection works in Claude Web, Desktop, and Cowork.

  • In Claude Desktop, open Customize > Connectors.
  • Next to Composio, click ⋮ and click Clear cache.
  • If Ceramic tools still do not appear, click ⋮, disconnect, remove the connector, and add it again.
  • On Team or Enterprise, an Owner or Primary Owner must enable the connector before you can connect Ceramic.
TOOLS

Supported Tools

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

Search Web

Search the public web with concise lexical keywords and return up to 10 relevant pages with descriptions.

FRAMEWORKS

How to build Ceramic MCP Agent with another framework

ChatGPT Work logo

ChatGPT Work

Use Ceramic MCP with ChatGPT Work

Hermes logo

Hermes

Use Ceramic MCP with Hermes

FAQ

Frequently asked questions

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

Yes, you can. Claude Cowork 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 Ceramic tools.

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

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