Nopexo API

Send SMS, send bulk SMS and verify phone numbers in Ghana from your own software.

The API is a small set of HTTPS endpoints that take and return JSON. You authenticate with a project API key, and everything you do is scoped to that project: its messages, its verifications, its webhooks and its usage.

What you can do

• Send a single SMS and follow it to delivery.
• Send one message to up to 10,000 numbers, personalized per recipient, now or later.
• Verify phone numbers with one-time codes (OTP): send, resend and check, with fraud protection built in.
• Receive signed webhooks for delivery reports, verification results and finished batches.
• Read delivery reports and your wallet balance.

Base URL

https://api.nopexo.com

Every endpoint is versioned under /v1. We add fields and endpoints without changing the version; anything that would break an integration gets a new version.

Sandbox first

Every project can create sandbox keys (nxk_test_…). Requests with a sandbox key behave exactly like production — validation, statuses, webhooks — but nothing reaches a real phone and nothing is charged. Test numbers give predictable outcomes, including failures.

Machine-readable spec

The full API is described in OpenAPI 3.1 at https://api.nopexo.com/v1/openapi.json. Import it into Postman, Insomnia or a code generator.