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EffiLink gives you a single REST API to send transactional emails, run marketing campaigns, deliver SMS messages, and receive real-time engagement events via webhooks. All of this runs on EffiLink’s infrastructure at api.effilink.co, so you focus on your product, not on deliverability.

Transactional Email

Send triggered emails like order confirmations, password resets, and shipping notifications.

Marketing Campaigns

Create and deliver newsletters, promotions, and announcements to contact lists.

SMS

Send individual or bulk SMS messages for notifications and promotions.

Webhooks

Receive real-time events for every delivery, open, click, bounce, and unsubscribe.

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API fundamentals

EffiLink provides geographically distributed API endpoints to ensure high availability and optimal access performance. Please use the endpoint closest to your application’s deployment region:
  • Mainland China:
  • Hong Kong China:
  • Europe:
For the best latency and reliability, we recommend selecting the endpoint that is geographically closest to your users or application servers. Every request must:
  • Be sent over HTTPS
  • Use Content-Type: application/json
  • Include an authentication header (ApiKey or OAuth)
Parameter names are case-sensitive. All request and response data uses UTF-8 encoding.

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HTTP response codes

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Pagination

List and search endpoints return paginated results. Use these query parameters to navigate pages:

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Next steps

Quick Start

Send your first email in under 5 minutes.

Authentication

Learn how to authenticate API requests.