The API version is specified in the URL; e.g. https://example.teamwork.com/spaces/api/v1/spaces.json.
We’ll introduce new API versions rather than break backwards compatibility.
Endpoints that are set to v0 are subject to change and should be seen as beta endpoints. Integrate with these with caution as they can change or be moved to v1.
If you have any feedback or suggestions, feel free to contact us at firstname.lastname@example.org.