Sinch Functions

Overview

Sinch Functions is in beta: free during the beta period, and the API may change before general availability. Sinch API usage (Voice, Conversation, Numbers) is billed as usual.

Sinch Functions is a serverless platform for voice, SMS, and conversation applications. You write a function, deploy it with the CLI, and Sinch routes callbacks and webhooks to it.

Functions are the compute layer between Sinch's telephony network and your business logic. A call comes in, Sinch invokes your function with an event, and your function returns call commands or a webhook response.

Voice API v2 is what a new function is written against. The unversioned name always means the current API: context.voice and Context.Voice are v2. The v2 sections below lead this skill because developers.sinch.com does not yet have a Functions-on-v2 page. Existing Voice v1 functions keep running unchanged; see Voice v1 callbacks.

Related skills for deeper guidance:

• sinch-cli — CLI commands for the full Sinch platform (Functions, Voice, Numbers, Conversation, Fax, SIP)
• sinch-functions-node — Node.js/TypeScript runtime API
• sinch-functions-dotnet — C#/.NET runtime API
• Voice API v2 is covered by the sinch-voice-api-v2 skill; load it for the REST contract, SVAML v2 commands, and service configuration.

Agent Instructions