Octomind compares MCP tools vs REST APIs

The author analyzes the architectural differences between direct REST APIs, model function calling, and the Model Context Protocol (MCP) to help developers choose the appropriate interface for AI agents. Direct HTTP is recommended when an application already knows the operation and sequence, while MCP is best suited when multiple compatible clients need to discover and invoke a curated set of tools. The article also reviews trade-offs involving context window token costs, latency, and security best practices like authorization and scoping. Open article →