The TextUs SMS API is a RESTful API that allows your company to integrate your TextUs messages and contacts with your CRM or any other tool. The majority of functionality within our web application is accessible via the API, so the integration possibilities are endless.
The TextUs SMS API supports HTTP Basic authentication. To authenticate, base-64 encode your username and api key (separated with a colon) and place the result in an ‘Authorization’ header. You may authenticate with your username and password, or with your username and API key.