Traditional API marketplaces optimize for a developer reading docs, writing integration code, and deploying it. That flow worked in 2015. In 2026, every new app starts from a prompt to Claude Code or Cursor.
An AI Agent is. The agent discovers “I need weather data” by inferring intent from a user prompt, finds a weather API via search_apis, and calls it through apitree. No docs were read. No SDK was imported manually.
Three things: machine-discoverable descriptions (not marketing copy), structured error responses with recovery hints (not human-readable stack traces), and a single protocol (MCP) rather than 100 bespoke SDKs. apitree is built around these three assumptions.
Humans still need to sign up, configure, and monitor. Those flows exist on apitree — but they’re the B-feature. The A-feature is: an AI Agent can onboard itself, call whatever it needs, and report back.