Documentation · v3
Relay API
Messaging API for SMS, email and push. REST endpoints, webhooks and official SDKs.
Get started
Keys, your first request and test mode.
Authentication
API keys, scopes and rotating secrets.
Messages
Send and track SMS, email and push messages.
Webhooks
Receive delivery events and verify signatures.
SDKs & tools
Node.js, Python, PHP, Go and the Relay CLI.
Errors & limits
Error codes, retries and rate limits.
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