Building a custom API integration

SendBlix provides a REST API for developers who need custom integrations beyond what native connectors and Zapier offer.

Available endpoints

Contacts: create, update, list, delete. Messages: send template message, send session message. Campaigns: create, schedule, get status. Templates: list approved templates.

Authentication

All API requests require an API key in the Authorization header. Rate limits apply: 100 requests per minute on the free plan, higher on paid plans.