Zernio
Zernio
API Reference

SMS

Messaging

Send an SMS/MMSPOSTLook up carrier + line typeGETList SMS opt-outsGET

Number Setup

Enable SMS on a numberPOSTDisable SMS on a numberDELETEAdd number to SMS registrationPOST

Registrations

List carrier registrationsGETPre-check a carrier registrationPOSTStart a carrier registrationPOSTGet a carrier registrationGETCreate a registration share linkPOSTDeactivate a brand/campaign registrationDELETE

Registration Review

Appeal a rejected campaignPOSTReply to a change requestPOSTUpload opt-in form proof for an appealPOSTUpload opt-in form proofPOSTRe-send the sole-prop OTPPOSTSubmit the sole-prop OTPPOST

Sender IDs

List alphanumeric sender IDsGETCreate an alphanumeric sender IDPOSTDelete an alphanumeric sender IDDELETERequest a higher sender ID daily limitPOST
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SMS

Disable SMS on a number

Turns off SMS for the number (deactivates its SMS account). The carrier registration is untouched, so re-enabling later reactivates it, with no re-registration.

DELETE
/v1/phone-numbers/{id}/sms

Authorization

bearerAuth
AuthorizationBearer <token>

API key authentication: send your Zernio API key in the Authorization header, prefixed with Bearer.

In: header

Path Parameters

id*string

Response Body

application/json

application/json

import Zernio from '@zernio/node';const zernio = new Zernio({ apiKey: process.env.ZERNIO_API_KEY });const { data } = await zernio.sms.disableSmsOnNumber({  path: {    id: 'abc123',  },});console.log(data);
{  "enabled": true,  "phoneNumber": "string",  "disabled": true}
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Enable SMS on a number

Turns on SMS for one of your numbers. The number's real carrier capability is checked first: some number types can't do SMS at all (`smsCapable: false`), and a number still provisioning at the carrier returns `notReady: true` (try again once provisioning finishes). US numbers additionally need a carrier registration before messages deliver; the response tells you which path applies: - `alreadyRegistered: true`: a prior registration still covers this number; SMS was reactivated. - `reusable` set: you have an approved registration this number can join in one click via `POST /v1/phone-numbers/{id}/sms/reuse-registration` (no new brand/campaign, no extra carrier fee). - `needsRegistration: true` and no `reusable`: start one via `POST /v1/sms/registrations`. Idempotent: re-running re-attempts any carrier-side setup that failed.

Add number to SMS registration

Attaches this number to your existing approved 10DLC campaign instead of running a fresh registration: the number inherits the campaign's approval (no new brand or campaign, no extra carrier fee). Enable SMS on the number first (`POST /v1/phone-numbers/{id}/sms`; its response tells you whether a reusable registration exists).