Open source

Read it before you trust it.

Seamless is open source under Apache-2.0, with no user cap, no expiry and no enterprise edition. Every security feature we ever build lands here, in the open, where you can check our work.

View on GitHubHow to contribute
The server
seamless-auth-apiThe passwordless auth server: passkeys, magic links, one-time codes and OAuth.TypeScript
Connect your backend
seamless-auth-serverNode: Express, Fastify and Next.jsTypeScriptseamless-auth-goGo net/httpGoseamless-auth-rustRust and AxumRustseamless-auth-pythonFastAPI and DjangoPython
Connect your frontend
@seamless-auth/​reactReactTypeScript@seamless-auth/​react-nativeReact Native. Used by RoxTarget.TypeScript@seamless-auth/​angularAngularTypeScript@seamless-auth/​vueVueTypeScript@seamless-auth/​svelteSvelteTypeScript
Run it
seamless-auth-admin-dashboardManage users, sessions and security events.TypeScriptseamless-cliScaffold an app with auth already wired in.TypeScriptdocs.seamlessauth.comGuides, API reference and an llms.txt for coding agents.Docs
# Start a new app with passkeys wired in
$ npx seamless-cli init my-app
Contribute

Found a bug? Tell us.

Open an issue on any repo, pick up a good first issue, or email us. Every report gets a reply from the person who wrote the code.

Open an issueGood first issues
Standards and outside review
  • FIDO conformance tools pretestPassed Sep 2026
  • FIDO Functional CertificationNot yet submitted
  • OpenID certificationPlanned, v0.21
  • Independent security reviewPlanned, v1.0

Run your own identity this afternoon.

One command scaffolds a web app, an API and a Seamless Auth server, already wired together. Free, open source, and yours to keep.

$ npx seamless-cli init my-app
Start the quickstartStar it on GitHub

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