Base URL
Every Space on SignalWire has its own subdomain, and every API request goes through your Space’s subdomain over HTTPS. Plain HTTP requests are rejected.
Throughout these docs, examples use the placeholder example.signalwire.com — replace example with your own Space’s subdomain when copying requests into your code.
Find your subdomain
Your Space subdomain is the prefix that comes before .signalwire.com in your Dashboard URL. If you sign in at https://acme.signalwire.com/dashboard, your subdomain is acme.
You’ll also find it under API Credentials in the SignalWire Dashboard, alongside your Project ID and API tokens.
URL structure
REST API requests follow a consistent pattern:
{your_space}— your Space subdomain{family}— the API surface (e.g.,messaging,calling,fabric){resource}— the specific resource or operation (e.g.,messages,rooms)
For example, listing messages for your project looks like:
HTTPS only
All SignalWire REST APIs require HTTPS. Requests sent over plain HTTP are refused — there is no automatic upgrade. Make sure your HTTP client is configured for TLS.
