---
title: "Send SMS using JSON"
method: POST
path: "/v1/{sid}/messages/json"
tags: ["Bulk SMS APIs"]
---

# Send SMS using JSON

`POST /v1/{sid}/messages/json`

## Request

- Base URL: `api.in.kaleyra.io` (relative, and the document’s source URL is not known)
- URL: `api.in.kaleyra.io/v1/{sid}/messages/json`
- Auth: none declared. Required headers: `api-key`, `Content-Type`

To send marketing messages use "type" value as "MKT".
To send transactional messages use "type" value as "TXN".
To send otp messages use "type" value as "OTP".
To send SMS to multiple numbers use Comma separated values in "to"

## Path parameters

- `sid` string, required

## Headers

- `api-key` string, required
- `Content-Type` string, required

## Request body `*/*`

- string

## Response `200`

Successful response

---

[API](https://skmtc.dev/kaleyra/apis/kaleyra-io-sms-apis.md) - [All operations](https://skmtc.dev/kaleyra/apis/kaleyra-io-sms-apis/llms.txt) - [OpenAPI document](https://skmtc.dev/kaleyra/apis/kaleyra-io-sms-apis/revisions/b7c9b536aa4d?raw)