# What this PR does
https://github.com/grafana/oncall/issues/3330
- add a script that generates TS type definitions based on OnCall API
OpenAPI schemas
- support adding custom properties on the frontend if needed
- add simple example of usage (for `'/labels/keys/'` endpoint)
## Checklist
- [x] Unit, integration, and e2e (if applicable) tests updated
- [x] Documentation added (or `pr:no public docs` PR label added if not
required)
- [x] `CHANGELOG.md` updated (or `pr:no changelog` PR label added if not
required)