Connect Claude Desktop

The Atmark MCP server only authenticates with an Authorization: Bearer <token> header. It doesn't support connector sign-in that opens a login window. So in Claude Desktop, you connect through a local bridge that can add a request header.

Before you start#

• Claude Desktop
• A bridge that forwards to a remote MCP server and adds request headers (an MCP server that runs locally)
• This agent's token (atk_agent_…)

1. Set up the bridge#

   Add the bridge under mcpServers in Claude Desktop's config file (claude_desktop_config.json). The bridge needs three values:

   • URL: https://api.atmark.ai/mcp
   • Transport: Streamable HTTP
   • Header: Authorization: Bearer <token>

   Don't write the token into the config file. If the bridge supports it, pass it through an environment variable.

2. Restart#

   Quit Claude Desktop completely and open it again.

3. Check it#

   In a chat, ask it to call get_my_policy from Atmark. If from_address is the agent's address, you're done.

Troubleshooting#

• 401: Check that the bridge actually adds the header. See Fix connection problems.
• 403 Origin not allowed: Something is sending an Origin header, like a browser would. Use a bridge that makes server-to-server requests.
• Server requirements are listed in Other MCP clients.