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

Request a higher sender ID daily limit

Asks support to raise the workspace's daily sender-ID message cap. There is no self-serve raise: the request (desired cap + use case) is reviewed manually, usually within a business day.

POST
/v1/sms/sender-ids/limit-request

Authorization

bearerAuth
AuthorizationBearer <token>

API key authentication - use your Zernio API key as a Bearer token

In: header

Request Body

application/json

TypeScript Definitions

Use the request body type in TypeScript.

Response Body

application/json

application/json

application/json

{  "requested": true,  "requestedCap": 0}
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Delete an alphanumeric sender ID

Deactivates the sender ID so it can no longer send. Re-creating the same sender ID via `POST /v1/sms/sender-ids` re-activates it.

Send a verification code

Generate a one-time code, deliver it to the recipient, and store only its hash. Check the user-typed code with POST /v1/verify/verifications/{verificationId}/check. Re-POSTing for the same (channel, to) while a verification is active RESENDS a fresh code on the existing verification (200 with `resend: true`) instead of creating a new one; resends are limited to one per 60 seconds (429 with `retryAfterSeconds` inside the cooldown). The stored brandName/codeLength/ttlMinutes win on a resend. Codes deliver by SMS from a phone number on your account (`from` optional when you own exactly one SMS-enabled number) and the message uses a fixed template. Each accepted send bills one verification fee plus the standard message rate.

requestedCap*integer

Desired daily message cap. Must exceed the current cap.

reason*string

Use case and audience (what you send, to whom, opt-in status).

Length10 <= length <= 2000