> ## Documentation Index > Fetch the complete documentation index at: https://docs.open.cx/llms.txt > Use this file to discover all available pages before exploring further. # Resource Usage > The Resource Usage API reports how often a given AI instruction, knowledge base item, or action was available to the AI and how often it was actually applied. The Resource Usage API is a reverse lookup over AI-reply usage: given an action, instruction, or knowledge base item, it answers **"where was this used?"** and **"how often does it fire?"**. ## How Usage Is Tracked Every AI reply records which resources were involved, with two usage kinds: * **Available** — the resource was in the AI's context for the reply. For instructions and knowledge base items, this means it was eligible to be used. * **Applied** ("used") — the resource was actually applied: an instruction or knowledge base item cited in the reply, or an action invoked. Actions are always recorded as applied (they only appear when called). Comparing applied vs. available gives an **apply-rate** for instructions and knowledge base items. ## Resource Types The `resource_type` path parameter selects what to look up: * `instruction` — an AI instruction / behavior * `knowledge` — a knowledge base item * `action` — a tool the AI can call ## Scopes Both endpoints require the resource's own read scope plus `chat-sessions:read` (the responses expose conversation data — session ids, ticket numbers, last message): * `instruction` / `knowledge` → `training:read` + `chat-sessions:read` * `action` → `actions:read` + `chat-sessions:read` ## Available Endpoints Aggregate available / applied counts for a resource List the conversations a resource was used in