Global Graphics, the developer of the Harlequin RIP, has released the MAKO software development kit (SDK) which gives developers access to prepress features for checking and converting PDF files.
In addition to preflight checks MAKO can be used for imposition, color conversion or adding content (e.g. bar codes).
Unlike other tools with similar features e.g. Callas pdfToolbox Server or Enfocus PitStop Server, MAKO is not a tool for end users but is intended for software developers who want to integrate prepress features into their software or workflows. A comprehensive APO documention is available.