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Senda’s REST API is organized around standard resource-oriented URLs, returns JSON-encoded responses, and leverages standard HTTP response codes and authentication patterns. Our staging sandboxes and live processors are separated by prefix-level key discrimination (sk_test_ vs sk_live_).

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Service Base URLs

All API calls must target the canonical gateway:
  • Production API base: https://api.sendapay.io/v1
  • Local Dev API base: http://localhost:8080/v1

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API Authentication

Authenticate your API requests by including your secret key in the Authorization header of all server-to-server requests: 
Authorization: Bearer sk_test_your_secret_key
Never expose your secret keys (sk_) in client-side code, mobile applications, or frontend bundles. Use your publishable keys (pk_) exclusively for client-side SDK initializations.