MobileTopup.com MCP server

Endpoint:  https://mcp.mobiletopup.com/mcp  (Streamable HTTP)
Auth:      Authorization: Bearer <agent key>
           or https://mcp.mobiletopup.com/k/<agent key>/mcp
Free key:  https://mobiletopup.com/agents
Guide:     https://mobiletopup.com/agents/SKILL.md