docs: fix MCP setup instructions and add Claude Desktop support

[lasergoat]

Summary

• Fixed transport type: Changed "type": "streamableHttp" to "type": "http" in the .mcp.json example — streamableHttp is not a valid transport type in Claude Code
• Added claude mcp add CLI command: The existing docs only showed the JSON config approach
• Added Claude Desktop section: Desktop only supports stdio transport, so this documents the mcp-remote bridge setup
• Clarified token flow: Made it explicit that YOUR_TOKEN comes from the token create command output
• Added localhost note: Mentioned http://localhost:3100/mcp for local instances

Context

Ran into these issues while setting up a Phantom MCP connection in both Claude Code and Claude Desktop. The streamableHttp type caused a silent config failure, and Claude Desktop rejected the HTTP config entirely since it only speaks stdio.

🤖 Generated with Claude Code

[mcheemaa]

Verified E2E against a live Phantom instance. The http transport type is correct - connected via claude mcp add --transport http, tested 9/17 MCP tools successfully, all returning structured data with no errors. The streamableHttp in the current README would silently fail for anyone following the docs. One minor thing: the "Restart Claude Desktop after saving..." paragraph appears twice in the Claude Desktop section. I'll fix that in a follow-up. Thanks for the contribution, Daniel!

[lasergoat]

@mcheemaa question while I have your attention here - is there a way to have a phantom use claude code to take advantage of a subscription instead of using an api key? my phantom is getting expensive 😨

[coe0718]

I’m curious about this as well. I was gonna try my oauth token and see if it worked or not.

[mcheemaa]

@mcheemaa question while I have your attention here - is there a way to have a phantom use claude code to take advantage of a subscription instead of using an api key? my phantom is getting expensive 😨

Yeap, you should ssh into your machine and install claude code and then do a login it should pick that up for most of the work. You can also contribute and make the judges use claude code as a sub process I am currently working on it and have some stuff in flight