Reference
Adapter Options
Constructor options for all official provider adapters.
| Adapter | Required | Optional |
|---|---|---|
| Resend native | apiKey unless client is supplied | client |
| Resend HTTP | apiKey | baseUrl, timeoutMs, fetch |
| Postmark native | serverToken unless client is supplied | client, messageStream, timeoutMs |
| Postmark HTTP | serverToken | baseUrl, timeoutMs, fetch, messageStream |
| SendGrid native | apiKey unless client is supplied | client |
| SendGrid HTTP | apiKey | baseUrl, timeoutMs, fetch |
All HTTP adapters default to a 30-second timeout and globalThis.fetch. Native adapters use their provider SDK's behavior except where an option is explicitly passed through.