SDK Ecosystem — Official client libraries in the languages your customers ship in, wrapping the billing API with typed calls and sane retries. SDKs are how usage events, entitlement checks, and checkout flows enter product code and reach the metering pipeline downstream.
SDK Ecosystem lives in the Platform & Intelligence phase of Grow Revenue — the stage where you retain, expand, and compound revenue on the platform. In the corpus tool index this phase maps to the Analytics and Data platform and Cost & FinOpscategories.
No product category maps cleanly onto this module yet — companies typically build it in-house or cover it with adjacent tooling. See who builds vs buys across the corpus.