API documentation for OnlineSim

Interactive OpenAPI docs with auth guides, schemas, code samples, and Try It Out — in multiple languages.

Browse APIsOpen first API
GET/api/getBalance.php
curl \  'https://onlinesim.io/api/getBalance.php' \  -G -d 'apikey=YOUR_KEY'
200 OK

How does this work?

Three steps from catalog to a working request.

1

Choose an API

Pick a specification from the catalog and open its overview.

2

Set up auth

Follow the authentication guide for keys, OAuth, or headers.

3

Try It Out

Send live requests and copy ready-made code samples.

Available APIs

Select a specification to explore endpoints and examples.

APIv1.1

Onlinesim API

General description This API will allow you to access all services provided by Onlinesim: SMS receiving from a single specific service on a virtual nu

  • Interactive Try It Out
  • EN, RU, DE
  • Code samples & schemas
Open docs
APIv1.0

Reseller API

General description The API is intended for current and potential Onlinesim partners. It allows you to monetize your numbers by providing them to our

  • Interactive Try It Out
  • EN, RU, DE
  • Code samples & schemas
Open docs
APIv1.0

Alternative API

General description Alternative API for integration with Onlinesim. This API will allow you to access two main services of Onlinesim: rent numbers to

  • Interactive Try It Out
  • EN, RU, DE
  • Code samples & schemas
Open docs

FAQ

Quick answers about using this documentation.

Open the catalog below. Each card shows the title, version, and locales. Start with the API that matches your integration.