Rate limits
Irisend API requests are limited per team in a fixed one-second window shared across every key. Learn the rate-limit headers and how to handle a 429 response.
| Header | Meaning |
|---|---|
| ratelimit-limit | Requests allowed per second for this team |
| ratelimit-remaining | Requests left in the current one-second window |
| ratelimit-reset | Seconds until the window resets |
| retry-after | Sent only on a 429; seconds to wait before retrying |
The default limit is 10 requests per second per team, shared transport-agnostically across REST, SMTP, and MCP. A POST /emails/batch call counts as a single request regardless of how many emails it contains.