# Stackure

> Passwordless auth for B2B apps.

Stackure signs people in to B2B apps by email link or 6-digit code, with no passwords. It decides who can open each app through roles, teams and partner organizations, onboards partners through signups you approve and keeps an append-only activity log of sign-ins and changes. Apps add it with SDKs for Go, JavaScript, Python and Rust or with its HTTP API, and AI clients connect through its MCP server. The service at https://stackure.com is hosted in the EU, with its database in the EU. Stackure is from Mappstack, the registered business name of SY Innovations Pty Ltd.

## Docs

- [Docs Overview](https://stackure.com/docs): register an app, give people access, add sign-in and run it headless.
- [Go SDK](https://stackure.com/docs/go): net/http middleware for Go 1.27 or later, zero dependencies.
- [JavaScript SDK](https://stackure.com/docs/javascript): Express, Connect or plain Node.js 22 or later, zero dependencies.
- [Python SDK](https://stackure.com/docs/python): ASGI and WSGI middleware for FastAPI, Flask and Django on Python 3.14 or later, zero dependencies.
- [Rust SDK](https://stackure.com/docs/rust): tower middleware for axum, tonic and hyper.
- [API Reference](https://stackure.com/docs/api): every endpoint of the Sign-in API and the Management API.
- [MCP Server](https://stackure.com/docs/mcp): connect Claude or another AI client to your organization.
- [OpenAPI Spec](https://stackure.com/openapi.json): the Sign-in API and the Management API as OpenAPI.
- [Full Docs](https://stackure.com/llms-full.txt): every docs page, the FAQ and the policies as Markdown in one file.

## About

- [FAQ](https://stackure.com/faq): what it is, how it works, where data lives and how it compares with Auth0, Clerk, WorkOS and Supabase Auth.
- [Privacy Policy](https://stackure.com/privacy): what is collected, why, who receives it, how long it's kept and where.
- [Security](https://stackure.com/security): how to report a vulnerability.
- [Get Started](https://stackure.com/signup): apply for an organization. Every signup is read and answered by email.

## Optional

- [Go SDK Source](https://github.com/syi-stackure/sdk-go): the Stackure Go SDK on GitHub.
- [JavaScript SDK Source](https://github.com/syi-stackure/sdk-js): the Stackure JavaScript SDK on GitHub.
- [Python SDK Source](https://github.com/syi-stackure/sdk-py): the Stackure Python SDK on GitHub.
- [Rust SDK Source](https://github.com/syi-stackure/sdk-rust): the Stackure Rust SDK on GitHub.
- [Mappstack](https://mappstack.com/): the company behind Stackure.