> ## Documentation Index
> Fetch the complete documentation index at: https://docs.tryrelaybase.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Rate limits

Single email validation (`POST /v1/email/single-validate`) is designed for **individual** validation requests, one email address per request, triggered as part of your application's normal flow (e.g. validating an email at signup).

<Warning>
  Sending large numbers of sequential or concurrent requests through the
  single-validation endpoint — for example, looping over a list of emails — may
  trigger rate limiting.
</Warning>

```text theme={null}
100 emails
    ↓
100 × POST /v1/email/single-validate   ⚠️ Don't do this
```

If you need to validate many email addresses at once, use bulk validation instead once it becomes available. See [Bulk Email Validation](/email/bulk-validation).

<Note>
  Bulk validation is currently under development. Until it's available, keep
  single-validation calls scoped to individual, user-triggered requests rather
  than batch processing.
</Note>