Why am I getting a 403 on generateWidgetSession?

A 403 on this endpoint is usually a configuration or scope issue, not an account block.

A 403 on this endpoint is usually a configuration or scope issue, not an account block. Most rate limits you encounter originate from the upstream providers, which Terra manages on your behalf. See rate limits.

For high-volume launch-day backfills:

1

Keep date ranges to roughly 7 days or fewer per request to stay within provider limits.

2

Pre-connect users.

3

Trigger backfill early. Garmin backfill is async and requires Historical Data Export per user. Poll GET /v2/backfills/status.

If you hit transient errors, share a reproducible cURL and approximate request volume so limits can be reviewed.