Glossary · Published 2026-09-29 · AgentiSend team
Batch
Batch: Several different messages in one request. One item can fail on its own.
POST /emails/batch takes up to 500 different messages. Without an extra header, each item is accepted or refused on its own: one bad address does not drop the rest.
Each item still faces the rate ceiling, the budget, suppression, and the idempotency key rules. A batch is not a list of people you have not met.
Related terms
- Idempotency key — The caller-chosen key that makes a retry of the same request return the first result.
- Rate ceiling — How many recipients one key may accept in a single minute.