Concepts
Identifiers, errors, usage billing, and API conventions.
Guides in this section
Identifiers & slugs
How parts, manufacturers, and categories are identified — readable, stable slugs you can store and reuse.
Usage billing
You pay for detailed part data and AI — the full part record and AI jobs. Matching, catalog search, and metadata are free.
Errors
A single error envelope with a typed reason, an HTTP status, and a request_id for support.
Not sure where to begin? Open Identifiers & slugs.