[BUG] claude mcp add test-mcp http://localhost:8888/endpoint -t sse -H "Authorization: Basic [base64]" ignores the -H header

Environment

• Platform (select one):
• [ X] Anthropic API
• [ ] AWS Bedrock
• [ ] Google Vertex AI
• [ ] Other: <!-- specify -->
• Claude CLI version: 1.0.17
• Operating System: OS X 15.4.1
• Terminal: Terminal App

Bug Description

See bug title. When using the following command the -H parameter which should cause a HTTP header to be passed to the MCP server, is ignored.

claude mcp add test-mcp http://localhost:8888/endpoint -t sse -H "Authorization: Basic [base64]"

Steps to Reproduce

1. Run the above command with any HTTP header in the quotes and it won't get sent to the MCP server.

Expected Behavior

I expect the HTTP header to be sent as part of the HTTP request to the MCP server.

Actual Behavior

HTTP header is not sent.

Additional Context

I've tried -H in various positions and either got an error or same result.