> Fetch clean Markdown by appending `.md` to any page URL under https://signalwire.com/docs or requesting it with the HTTP header `Accept: text/markdown`. The root index at https://signalwire.com/docs/llms.txt lists the available documentation indexes.

# Calls


## API Docs

- Calls [Send call commands](https://signalwire.com/docs/apis/rest/calls/call-commands.md)

## OpenAPI Specification

The raw OpenAPI 3.1 specification for this API is available at:
- [OpenAPI JSON](https://signalwire.com/docs/apis/rest/calls/openapi.json)
- [OpenAPI YAML](https://signalwire.com/docs/apis/rest/calls/openapi.yaml)