How to Use the Library of Congress MCP in Claude Code

Q: How do I verify the Library of Congress connection?

Run the claude mcp list command. It shows the status of your connection and confirms that the tools are ready for use.

Claude Code runs headless archival queries against the Library of Congress from your terminal.

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Connect Library of Congress MCP to Claude Code

Create your Vinkius account to connect Library of Congress to Claude Code and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup Library of Congress with Claude Code

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Claude

Perplexity

Headless Library of Congress access

You can trigger `search_format` or `search` directly from your command line. The output is returned as raw JSON, perfect for piping into other shell utilities. This enables you to build automated research pipelines. You can chain these requests in a script to pull large batches of metadata.

Automated document retrieval

Using `get_resource`, you can fetch specific pages or files by their unique identifier. The server handles the connection logic, ensuring your terminal receives the data stream. It is built for speed and reliability. You can use it in CI/CD workflows or cron jobs to keep your local research database updated.

Technical metadata piping

The `get_image_info` tool provides technical details for high-resolution images. You can capture this output to verify file formats and resource availability automatically. This setup allows for programmatic validation of archival assets. It ensures that your automated tasks have access to the exact data required for processing.

Setup guide

Set up Library of Congress MCP in Claude Code

Prerequisites

Claude Code CLI installed (npm install -g @anthropic-ai/claude-code)
Active Vinkius subscription with a valid endpoint token

1

Run the add command

Open your terminal and run the command shown on the right. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com. Use --scope user to make it available across all projects.
2

Verify the connection

Start a Claude Code session and type /mcp to list connected servers. You should see library-of-congress-mcp with a green status indicator.
3

Start using tools

Ask Claude Code something like "Check my latest Library of Congress transactions." It will automatically discover and invoke the available Library of Congress tools.

Terminal

claude mcp add --transport http library-of-congress-mcp https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp

Get your connection token →

Prerequisites

Claude Code CLI installed
Active Vinkius subscription with a valid endpoint token

1

Open the config file

Create or edit .mcp.json in your project root for project-level scope, or ~/.claude.json for user-level scope.
2

Add the Library of Congress MCP

Paste the JSON snippet shown on the right into the mcpServers object. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com.
3

Restart Claude Code

Start a new Claude Code session. Type /mcp to confirm the server is connected. The tools will be automatically available in your conversation.

.mcp.json

{
  "mcpServers": {
    "library-of-congress-mcp": {
      "type": "url",
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

Get your connection token →

Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Library of Congress. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

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Common questions about Library of Congress MCP in Claude Code

It uses the MCP protocol to communicate with the server over HTTP or stdio. You configure the connection in your ~/.claude.json file.

Yes. Once the server is connected, you can ask the agent to search for specific items using the `search` tool through your terminal interface.

Yes. Since the tools output standard JSON, you can easily pipe the results into tools like jq or other processing scripts.

The server runs in an isolated sandbox. It only touches public bibliographic data and does not store or share your terminal session information.

Run the `claude mcp list` command. It shows the status of your connection and confirms that the tools are ready for use.

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