The Command+K blog
Field notes on AI-native SaaS.
How to ship MCP servers, embed in-product AI assistants, and monetize AI usage — written by the team building the platform.
- MCP education
MCP vs REST APIs: when to wrap and when to skip
MCP and REST solve different problems for different consumers. The diffs that matter — discovery, auth, errors, pagination, bounded output — and why most MCP servers are just glue over REST.
Jul 9, 2026 · 4 min - MCP education
MCP Tools vs Resources vs Prompts: which primitive when
MCP exposes three primitives because hosts render each as a different UI. Here's the decision rule for picking Tools, Resources, or Prompts — with examples.
Jun 27, 2026 · 4 min