API Reference
API Error Codes
High-level HTTP status codes returned by POST /v1/emails/send.
Histeria returns standard HTTP status codes for API responses.
| Status Code | Message | Cause |
|---|---|---|
202 Accepted | Email Queued | Request accepted and queued for delivery |
401 Unauthorized | Invalid API Key | Missing or revoked x-api-key header |
404 Not Found | Template Not Found | Specified templateId does not exist or is inactive |
422 Unprocessable | Validation Error | Missing required fields (to, templateId) |