# M7 documentation > Public API and SDK guides. Start with M7 Identity. Issuer: Discovery: Guide: Start: ## Start here: M7 Identity - [M7 SSO API reference](https://m7.org/docs/raw/api/sso.user.m7.org/README.md): clean Markdown. - [Discovery and signing keys](https://m7.org/docs/raw/api/sso.user.m7.org/discovery-and-keys.md): clean Markdown. - [Quickstart: authorization code with PKCE](https://m7.org/docs/raw/api/sso.user.m7.org/quickstart.md): clean Markdown. - [M7 OAuth 2.0 and OpenID Connect Provider Profile](https://m7.org/docs/raw/api/sso.user.m7.org/provider-profile.md): clean Markdown. - [M7 provider capability card](https://m7.org/docs/raw/api/sso.user.m7.org/provider-capabilities.md): clean Markdown. - [M7 Identity SDK](https://m7.org/docs/raw/sdk/m7-identity/README.md): clean Markdown. - [Dynamic client registration](https://m7.org/docs/raw/api/sso.user.m7.org/registration.md): clean Markdown. Live discovery defines current endpoint locations and advertised capabilities. The provider profile defines the integration contract and testing status. The SDK release page owns versions and download integrity. Register a client and its exact redirect URI before following the quickstart. Native crypto requirements and release status are separate from ordinary SDK installation. ## Collections - [M7 API Services](https://m7.org/docs/raw/api/README.md) - [BigFS API](https://m7.org/docs/raw/api/api.bigfs.m7.org/README.md) - [M7 Blog Service API](https://m7.org/docs/raw/api/api.blog.service.m7.org/README.md) - [Document API](https://m7.org/docs/raw/api/api.document.m7.org/README.md) - [`api.drop.m7.org` API reference](https://m7.org/docs/raw/api/api.drop.m7.org/README.md) - [`api.post.m7.org` API Reference](https://m7.org/docs/raw/api/api.post.m7.org/README.md) - [`api.user.m7.org` API Reference](https://m7.org/docs/raw/api/api.user.m7.org/README.md) - [M7 SSO API reference](https://m7.org/docs/raw/api/sso.user.m7.org/README.md) - [M7 SDKs and developer integrations](https://m7.org/docs/raw/sdk/README.md) - [M7 C Crypto](https://m7.org/docs/raw/sdk/m7-c-crypto/README.md) - [M7 Identity SDK](https://m7.org/docs/raw/sdk/m7-identity/README.md) - [M7 PHP Crypto](https://m7.org/docs/raw/sdk/m7-php-crypto/README.md) ## Human-readable pages - [Docs home](https://m7.org/docs) - [Provider docs](https://m7.org/docs/api/sso.user.m7.org/) - [SDK docs](https://m7.org/docs/sdk/m7-identity/) - [Full public documentation inventory](https://m7.org/sitemap-docs.xml)