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API Reference

API Reference

Build powerful integrations with our comprehensive REST API.

RESTful API

Clean, predictable REST endpoints

API Keys

Secure authentication with API keys

Webhooks

Real-time event notifications

SDKs

Official SDKs for popular languages

Quick Example

cURL
curl -X POST https://api.nexxss.com/v1/messages \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "to": "+1234567890",
    "channel": "sms",
    "content": "Hello from NEXXSS!"
  }'

Endpoints

Authentication

POST/auth/tokenPOST/auth/refreshDELETE/auth/revoke

Customers

GET/customersPOST/customersGET/customers/:idPUT/customers/:idDELETE/customers/:id

Conversations

GET/conversationsPOST/conversationsGET/conversations/:id/messagesPOST/conversations/:id/messages

Webhooks

GET/webhooksPOST/webhooksDELETE/webhooks/:id

Official SDKs

Get started quickly with our official SDKs for JavaScript, Python, Ruby, Go, and PHP.

JavaScriptPythonRubyGoPHP