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LāML APIs | SignalWire

Build it better. For less.

Legacy Antiquated Markup Language or LāML APIs are designed to provide quick relief if you're currently stuck with a price-gouging SMS, voice, or video provider. Save money immediately and add advanced functionality by migrating your application to SignalWire's next-generation communications cloud.

LāML Voice

Use familiar XML syntax for incoming voice functions including <Play>, <Say>, <Gather>, <Dial>, <Conference>, <Enqueue>, et al. With the REST API, perform more sophisticated functions including managing conference participants, recordings, and call logs.

LāML Messaging

Migrate messaging applications easily with familiar XML syntax and API libraries to send, receive, and manage both SMS and MMS messages.

LāML Fax

On incoming faxes, you can use standard existing <Receive> or <Reject> XML declarations. Through the LāML API, you can send faxes, receive faxes, and manage faxes stored in the our cloud with familiar structures.


With LāML APIs, you can provision and manage the telephone numbers in your SignalWire space making it easy to maintain a high-volume service programmatically.

Backward Compatible

Minimal application changes mean minimal risk. Take a truly advanced communications cloud for a spin and save money in the process.

Lowest Prices

Phone numbers from $0.25/month. SMS messaging from $0.0014/msg. Voice from $0.0035/min. Free expert support.

We speak your language.

Our client libraries and SDKs make it easy to get started with LāML.

Simple XML Responses

Perform telephony functions such as sending SMS responses or forwarding telephone calls based on simple XML responses to Webhooks for incoming events.

Compatible with Existing Logic

The LāML REST API is designed to ease the migration of your existing phone or messaging application to our advanced communications cloud.

Priced to Disrupt

As the original geeks of software-defined telecom, our mission is to democratize the technology, not price-gouge you for numbers, minutes, or messages. Our industry-low rates are offered to all customers regardless of volume. No contracts. No commitments.

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