# portatour® ISV API > REST API that lets partners leverage the portatour® Route Planner algorithm to create optimized schedules for field reps. ## Current version (v1.3) - [OpenAPI specification (YAML)](/doc/v1.3/portatour.yaml): Complete, self-contained spec — all operations, schemas and the full prose documentation (introduction, how-tos, changelog, FAQ, error codes, schedule messages) embedded. Recommended single source for LLMs. - [OpenAPI specification (JSON)](/doc/v1.3/portatour.json): Identical content as JSON. - [Human-readable documentation](/1.3/index.html): The same content rendered as HTML.