Official SDKs

Posta provides official client libraries for three languages. All SDKs offer the same core functionality:

Method	Description
SendEmail	Send a single email with HTML/text, attachments, and headers
SendTemplateEmail	Send an email using a pre-defined template
SendBatch	Send batch emails to multiple recipients
GetEmailStatus	Check delivery status by email UUID

Available SDKs

Language	Package	Min Version
Go	github.com/goposta/posta-go	Go 1.25+
PHP	goposta/posta-php	PHP 8.1+
Java	com.github.goposta:posta-java	Java 11+

Error Handling

All SDKs provide typed API errors that include:

• HTTP status code — The response status (e.g., 400, 401, 429)
• Error info — Structured error details with code and message fields

Response Envelope

All API responses use a standard envelope:

{
  "success": true,
  "data": { ... }
}

Error responses:

{
  "success": false,
  "error": {
    "code": "validation_error",
    "message": "Invalid email address",
    "error": "to[0]: invalid format"
  }
}