Validate carriers without saving
Dry run of POST /v1/carriers/batch: per-item errors and warnings, nothing written. Takes the same body; each carrier is checked on its own. Records are checked as sent, without looking up carriers Envoy already holds.
Authentication: Supports API key and bearer token authentication.
Authentication
Bearer authentication of the form Bearer <token>, where token is your auth token.
Headers
A unique key (up to 255 printable ASCII characters, e.g. a UUID) that makes a retry of this request safe. Envoy stores the response for 24 hours; a retry with the same key and the same request returns it again with Idempotent-Replayed: true instead of running twice. The same key with a different request returns 422 idempotency_key_reused; while the first request is still running, 409 idempotency_key_in_progress. 5xx and 429 responses are not stored.
Request
Carriers in the /v1/carriers/batch shape: {“carrier”: {…}}
Response
True when every item is valid (warnings allowed)
Counts for a dry run: how many items would be applied, rejected, or applied with warnings.

