# Authsignal Client API **Canonical:** https://apis.io/apis/authsignal/client-api/ **Provider:** Authsignal — https://apis.io/providers/authsignal/ **Base URL:** https://api.authsignal.com **Documentation:** https://docs.authsignal.com/api-reference/client-api/overview Authsignal Client API is one of 22 APIs that [Authsignal](https://apis.io/providers/authsignal/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include REST, Clients, Passkeys, and OTP. The published artifact set on APIs.io includes API documentation. Browser / device-facing REST API for fully custom authentication UIs. Supports passkeys, authenticator apps, SMS / WhatsApp OTP, email OTP, magic links, and push challenges. Authenticated with short-lived client tokens issued by the Server API. ## Machine-readable artifacts (1) - **Documentation** — https://docs.authsignal.com/api-reference/client-api/overview ## Other Authsignal APIs (12) - [Authsignal Server API](https://apis.io/apis/authsignal/server-api/) - [Authsignal Management API](https://apis.io/apis/authsignal/management-api/) - [Authsignal Webhooks](https://apis.io/apis/authsignal/webhooks/) - [Authsignal Node.js SDK](https://apis.io/apis/authsignal/sdk-node/) - [Authsignal Python SDK](https://apis.io/apis/authsignal/sdk-python/) - [Authsignal Java SDK](https://apis.io/apis/authsignal/sdk-java/) - [Authsignal .NET SDK](https://apis.io/apis/authsignal/sdk-dotnet/) - [Authsignal Ruby SDK](https://apis.io/apis/authsignal/sdk-ruby/) - [Authsignal PHP SDK](https://apis.io/apis/authsignal/sdk-php/) - [Authsignal Go SDK](https://apis.io/apis/authsignal/sdk-go/) - [Authsignal Browser SDK](https://apis.io/apis/authsignal/sdk-browser/) - [Authsignal iOS SDK](https://apis.io/apis/authsignal/sdk-ios/) ## Tags REST, Clients, Passkeys, OTP --- Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/authsignal/client-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/authsignal/.