MCP Server returning 404 "Application not found" on Railway

[nyongondos]

Problem

The hosted MCP server at https://pasal-mcp-server-production.up.railway.app/mcp is returning HTTP 404 with the following response:

{"status":"error","code":404,"message":"Application not found","request_id":"9qxyPsi5RLON5uJQAQeqjw"}

Steps to Reproduce

1. Add the MCP server using the documented command:

   claude mcp add --transport http pasal-id https://pasal-mcp-server-production.up.railway.app/mcp
   

2. Open Claude Code — the server fails to connect with status ✘ failed and ✘ not authenticated

Error Detail in Claude Code

Error: HTTP 404: Invalid OAuth error response: ZodError: [
  {
    "expected": "string",
    "code": "invalid_type",
    "path": ["error"],
    "message": "Invalid input: expected string, received undefined"
  }
]

Environment

• Client: Claude Code (CLI)
• Transport: HTTP
• Date: 2026-03-31

Notes

The Railway deployment appears to be down or suspended. No other open issues report this — posting here so it's on the radar. The README still points to this URL as the primary setup method.