https://api.signal.apollodeploy.com by default.
Before you start, create an API key with Emails: Send permission
and verify the From domain.
1
Install the SDK
2
Store your API key
Set
SIGNAL_API_KEY in the server environment or secret manager.3
Send an email
Python uses
from_ because from is a reserved keyword. Recipient fields are lists, and the From
domain must be verified in the same Signal project as the API key.All SDKs
Compare every supported language and framework.
Manage emails
Follow message states and delivery timelines.