# Milestones

Group: PSA

[Open in the interactive reference](https://docs.api.lensing.ai/lensing/v1/groups/psa-milestones)

A milestone is a billable checkpoint on a PSA project, with its own amount, due date, and status.

You can read milestones but not change them: there is no endpoint to create, change, delete, or invoice a milestone.

## Endpoints

- [List milestones](https://docs.api.lensing.ai/reference/lensing/v1/endpoints/milestones.html): `GET /psa/milestones`
- [Retrieve a milestone](https://docs.api.lensing.ai/reference/lensing/v1/endpoints/getMilestone.html): `GET /psa/milestones/{id}`