​
Authentication

Authentication is done using a tenant_key which is a UUID associated with your account. This key must be included in all API requests.

​
Tenant Key

Your tenant key can be found under Settings in your Paysight account.

​
Domain Authorization

You can only send emails from domains that have been authorized for your account. Domains can be managed within Paysight under Settings. (Coming soon). For now, please contact your account manager to add a domain to your account.

​
Endpoints

​
Send a Single Email

Endpoint: POST https://app.paysight.io/api/email Request Body: 
{
  "tenant_key": "uuid-of-tenant",
  "from": "sender@authorized-domain.com",
  "to": "recipient@example.com", // Can also be an array of email addresses
  "subject": "Email Subject",
  "replyTo": "reply@somedomain.com", // Optional - any email address (customer care address or otherwise)
  "cc": "cc@example.com", // Optional, can also be an array
  "bcc": "bcc@example.com", // Optional, can also be an array
  "templateType": "react", // "react" or "string"
  "templateName": "generic", // Required for "react" templateType
  "templateContent": "<html>...</html>", // Required for "string" templateType
  "data": {
    // Data to populate the template
    "heading": "Welcome",
    "bodyContent": "This is the email content",
    "ctaText": "Click Here",
    "ctaUrl": "https://example.com"
  },
  "idempotencyKey": "optional-custom-idempotency-key" // Optional
}
Note: For security reasons, loading templates from files is not supported. Templates must be provided directly in the templateContent field when using the “string” templateType.
Response: 
{
  "success": true,
  "message": "Email sent successfully",
  "data": {
    "message": "Email sent successfully",
    "id": "email-id",
    "to": "recipient@example.com",
    "tenantKey": "uuid-of-tenant"
  }
}

​
Send Batch Emails

Endpoint: POST https://app.paysight.io/api/email/batch Request Body: 
{
  "tenant_key": "uuid-of-tenant",
  "emails": [
    {
      "from": "sender@authorized-domain.com",
      "to": "recipient1@example.com",
      "subject": "Email Subject 1",
      "templateType": "react",
      "templateName": "generic",
      "data": {
        "heading": "Welcome User 1",
        "bodyContent": "This is the email content for user 1"
      }
    },
    {
      "from": "sender@authorized-domain.com",
      "to": "recipient2@example.com",
      "subject": "Email Subject 2",
      "templateType": "string",
      "templateContent": "<html>Hello {{name}}</html>",
      "data": {
        "name": "User 2"
      }
    }
  ],
  "idempotencyKey": "optional-custom-idempotency-key" // Optional
}
Response: 
{
  "success": true,
  "message": "Batch emails sent successfully",
  "data": {
    "message": "Batch emails sent successfully",
    "count": 2,
    "responses": [
      {
        "id": "email-id-1"
      },
      {
        "id": "email-id-2"
      }
    ],
    "tenantKey": "uuid-of-tenant"
  }
}

​
Error Responses

​
Invalid Request Format

{
  "success": false,
  "error": "Validation error",
  "details": {
    // Validation error details
  }
}

​
Invalid Tenant Key

{
  "success": false,
  "error": "Invalid tenant key or tenant not found"
}

​
Unauthorized Domain

{
  "success": false,
  "error": "Domain 'unauthorized-domain.com' is not authorized for this tenant"
}

​
Server Error

{
  "success": false,
  "error": "Server error",
  "details": "Error message"
}

​
Idempotency

The API supports idempotency to prevent duplicate emails from being sent. You can provide your own idempotencyKey in the request, or the API will generate one based on the content of the request. Idempotency keys expire after 7 days.

​
Templates

​
React Templates

The following React templates are available:
  • generic: A generic email template with heading, body content, and CTA button
  • order-confirmation: An order confirmation email template
  • welcome-membership: A welcome email for new members

​
String Templates

String templates support variable substitution using the {{variable}} syntax and conditional blocks using {{#if variable}}...{{/if}}. Example: 
<div>
  <h1>Hello {{name}}!</h1>
  <p>{{message}}</p>
  {{#if showButton}}
  <a href="{{buttonUrl}}">{{buttonText}}</a>
  {{/if}}
</div>

​
Implementation Notes

  • Domain verification ensures you can only send from authorized domains
  • Idempotency prevents duplicate emails from being sent
  • All emails are tracked for monitoring and debugging purposes