They answer different questions:

• Documentation MCP Server: What does this Mocean API operation accept and return? It supplies structured, current API contract details on demand.
• Mocean Skills: How should my coding agent implement this workflow in my project? They supply curated procedures, constraints, edge cases, and testing expectations.

Use the Documentation MCP Server for precise contract retrieval. Use Skills for implementation guidance. Use both when a task benefits from both workflow knowledge and exact API details.