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Ory Hydra is a hardened, OpenID Certified OAuth 2.0 Server and OpenID Connect Provider optimized for low-latency, high throughput, and low resource consumption. Ory Hydra is not an identity provider (user sign up, user login, password reset flow), but connects to your existing identity provider through a login and consent app. Implementing the login and consent app in a different language is easy, and exemplary consent apps (Node) and SDKs for common languages are provided.
The easiest way to get started with Ory Software is in Ory Cloud! It is free for developers, forever, no credit card required!
Ory Cloud has easy examples, administrative user interfaces, hosted pages (e.g. for login or registration), support for custom domains, collaborative features for your colleagues, and much more!
If you're looking to jump straight into it, go ahead:
- Run your own OAuth 2.0 Server - step by step guide: A in-depth look at setting up Ory Hydra and performing a variety of OAuth 2.0 Flows.
- Ory Hydra 5 Minute Tutorial: Set up and use Ory Hydra using Docker Compose in under 5 Minutes. Good for hacking a Proof of Concept.
- Run Ory Hydra in Docker: An advanced guide to a fully functional set up with Ory Hydra.
- Integrating your Login and Consent UI with Ory Hydra: The go-to place if you wish to adopt Ory Hydra in your new or existing stack.
Besides mitigating various attack vectors, such as a compromised database and OAuth 2.0 weaknesses, Ory Hydra is also able to securely manage JSON Web Keys. Click here to read more about security.
Table of Contents
- What is Ory Hydra?
- Libraries and third-party projects
- Blog posts & articles
What is Ory Hydra?
Ory Hydra is a server implementation of the OAuth 2.0 authorization framework and the OpenID Connect Core 1.0. Existing OAuth2 implementations usually ship as libraries or SDKs such as node-oauth2-server or Ory Fosite, or as fully featured identity solutions with user management and user interfaces, such as Keycloak.
Implementing and using OAuth2 without understanding the whole specification is challenging and prone to errors, even when SDKs are being used. The primary goal of Ory Hydra is to make OAuth 2.0 and OpenID Connect 1.0 better accessible.
Ory Hydra implements the flows described in OAuth2 and OpenID Connect 1.0 without forcing you to use a "Hydra User Management" or some template engine or a predefined front-end. Instead, it relies on HTTP redirection and cryptographic methods to verify user consent allowing you to use Ory Hydra with any authentication endpoint, be it Ory Kratos, authboss, User Frosting or your proprietary Java authentication.
Who's using it?
The Ory community stands on the shoulders of individuals, companies, and maintainers. We thank everyone involved - from submitting bug reports and feature requests, to contributing patches, to sponsoring our work. Our community is 1000+ strong and growing rapidly. The Ory stack protects 16.000.000.000+ API requests every month with over 250.000+ active service nodes. We would have never been able to achieve this without each and everyone of you!
The following list represents companies that have accompanied us along the way and that have made outstanding contributions to our ecosystem. If you think that your company deserves a spot here, reach out to firstname.lastname@example.org now!
|Sponsor||Raspberry PI Foundation||raspberrypi.org|
|Sponsor||Cashdeck / All My Funds||cashdeck.com.au|
|Adopter *||Security Onion Solutions||securityonionsolutions.com|
We also want to thank all individual contributors
as well as all of our backers
and past & current supporters (in alphabetical order) on Patreon: Alexander Alimovs, Billy, Chancy Kennedy, Drozzy, Edwin Trejos, Howard Edidin, Ken Adler Oz Haven, Stefan Hans, TheCrealm.
* Uses one of Ory's major projects in production.
OAuth2 and OpenID Connect: Open Standards!
Ory Hydra implements Open Standards set by the IETF:
- The OAuth 2.0 Authorization Framework
- OAuth 2.0 Threat Model and Security Considerations
- OAuth 2.0 Token Revocation
- OAuth 2.0 Token Introspection
- OAuth 2.0 for Native Apps
- OAuth 2.0 Dynamic Client Registration Protocol
- OAuth 2.0 Dynamic Client Registration Management Protocol
- Proof Key for Code Exchange by OAuth Public Clients
- JSON Web Token (JWT) Profile for OAuth 2.0 Client Authentication and Authorization Grants
and the OpenID Foundation:
- OpenID Connect Core 1.0
- OpenID Connect Discovery 1.0
- OpenID Connect Dynamic Client Registration 1.0
- OpenID Connect Front-Channel Logout 1.0
- OpenID Connect Back-Channel Logout 1.0
OpenID Connect Certified
Ory Hydra is an OpenID Foundation certified OpenID Provider (OP).
The following OpenID profiles are certified:
- Basic OpenID Provider
- Implicit OpenID Provider
- Hybrid OpenID Provider
- OpenID Provider Publishing Configuration Information
- Dynamic OpenID Provider
To obtain certification, we deployed the reference user login and consent app (unmodified) and Ory Hydra v1.0.0.
This section is a starter guide to working with Ory Hydra. In-depth docs are available as well:
5 minutes tutorial: Host your own OAuth2 environment
Head over to the Ory Developer Documentation to learn how to install Ory Hydra on Linux, macOS, Windows, and Docker and how to build Ory Hydra from source.
We build Ory on several guiding principles when it comes to our architecture design:
- Minimal dependencies
- Runs everywhere
- Scales without effort
- Minimize room for human and network errors
Ory's architecture is designed to run best on a Container Orchestration system such as Kubernetes, CloudFoundry, OpenShift, and similar projects. Binaries are small (5-15MB) and available for all popular processor types (ARM, AMD64, i386) and operating systems (FreeBSD, Linux, macOS, Windows) without system dependencies (Java, Node, Ruby, libxml, ...).
Ory Kratos: Identity and User Infrastructure and Management
Ory Kratos is an API-first Identity and User Management system that is built according to cloud architecture best practices. It implements core use cases that almost every software application needs to deal with: Self-service Login and Registration, Multi-Factor Authentication (MFA/2FA), Account Recovery and Verification, Profile, and Account Management.
Ory Hydra: OAuth2 & OpenID Connect Server
Ory Hydra is an OpenID Certified™ OAuth2 and OpenID Connect Provider which easily connects to any existing identity system by writing a tiny "bridge" application. Gives absolute control over user interface and user experience flows.
Ory Oathkeeper: Identity & Access Proxy
Ory Oathkeeper is a BeyondCorp/Zero Trust
Identity & Access Proxy (IAP) with configurable authentication, authorization,
and request mutation rules for your web services: Authenticate JWT, Access
Tokens, API Keys, mTLS; Check if the contained subject is allowed to perform the
request; Encode resulting content into custom headers (
X-User-ID), JSON Web
Tokens and more!
Ory Keto: Access Control Policies as a Server
Ory Keto is a policy decision point. It uses a set of access control policies, similar to AWS IAM Policies, in order to determine whether a subject (user, application, service, car, ...) is authorized to perform a certain action on a resource.
Why should I use Ory Hydra? It's not that hard to implement two OAuth2 endpoints and there are numerous SDKs out there!
OAuth2 and OAuth2 related specifications are over 400 written pages. Implementing OAuth2 is easy, getting it right is hard. Ory Hydra is trusted by companies all around the world, has a vibrant community and faces millions of requests in production each day. Of course, we also compiled a security guide with more details on cryptography and security concepts. Read the security guide now.
If you think you found a security vulnerability, please refrain from posting it publicly on the forums, the chat, or GitHub and send us an email to email@example.com instead.
Our continuous integration runs a collection of benchmarks against Ory Hydra. You can find the results here.
Our services collect summarized, anonymized data that can optionally be turned off. Click here to learn more.
The full Ory Hydra documentation is available here.
HTTP API documentation
The HTTP API is documented here.
Upgrading and Changelog
New releases might introduce breaking changes. To help you identify and incorporate those changes, we document these changes in CHANGELOG.md.
Command line documentation
hydra -h or
We love all contributions! Please read our contribution guidelines.
You need Go 1.13+ with
GO111MODULE=on and (for the test suites):
- Docker and Docker Compose
- NodeJS / npm
It is possible to develop Ory Hydra on Windows, but please be aware that all guides assume a Unix shell like bash or zsh.
You can format all code using
make format. Our CI checks if your code is
There are three types of tests you can run:
- Short tests (do not require a SQL database like PostgreSQL)
- Regular tests (do require PostgreSQL, MySQL, CockroachDB)
- End to end tests (do require databases and will use a test browser)
All of the above tests can be run using the makefile. See the commands below.
# quick tests make quicktest # regular tests make test test-resetdb # end-to-end tests make e2e
It is recommended to use the make file to run your tests using
, however, you can still use the
go test command.
All tests run against a sqlite in-memory database, thus it is required to use
-tags sqlite build tag.
Short tests run fairly quickly. You can either test all of the code at once:
go test -v -failfast -short -tags sqlite ./...
or test just a specific module:
go test -v -failfast -short -tags sqlite ./client
or a specific test:
go test -v -failfast -short -tags sqlite -run ^TestName$ ./...
Regular tests require a database set up. Our test suite is able to work with docker directly (using ory/dockertest) but we encourage to use the Makefile instead. Using dockertest can bloat the number of Docker Images on your system and are quite slow. Instead we recommend doing:
Please be aware that
make test recreates the databases every time you run
make test. This can be annoying if you are trying to fix something very
specific and need the database tests all the time. In that case we suggest that
you initialize the databases with:
make test-resetdb export TEST_DATABASE_MYSQL='mysql://root:secret@(127.0.0.1:3444)/mysql?parseTime=true&multiStatements=true' export TEST_DATABASE_POSTGRESQL='postgres://postgres:firstname.lastname@example.org:3445/postgres?sslmode=disable' export TEST_DATABASE_COCKROACHDB='cockroach://email@example.com:3446/defaultdb?sslmode=disable'
Then you can run
go test as often as you'd like:
go test -p 1 ./... # or in a module: cd client; go test .
The E2E tests use Cypress to run full browser tests. You can execute these tests with:
The runner will not show the Browser window, as it runs in the CI Mode (background). That makes debugging these type of tests very difficult, but thankfully you can run the e2e test in the browser which helps with debugging! Just run:
./test/e2e/circle-ci.bash memory --watch # Or for the JSON Web Token Access Token strategy: # ./test/e2e/circle-ci.bash memory-jwt --watch
or if you would like to test one of the databases:
make test-resetdb export TEST_DATABASE_MYSQL='mysql://root:secret@(127.0.0.1:3444)/mysql?parseTime=true&multiStatements=true' export TEST_DATABASE_POSTGRESQL='postgres://postgres:firstname.lastname@example.org:3445/postgres?sslmode=disable' export TEST_DATABASE_COCKROACHDB='cockroach://email@example.com:3446/defaultdb?sslmode=disable' # You can test against each individual database: ./test/e2e/circle-ci.bash postgres --watch ./test/e2e/circle-ci.bash memory --watch ./test/e2e/circle-ci.bash mysql --watch # ...
Once you run the script, a Cypress window will appear. Hit the button "Run all Specs"!
OpenID Connect Conformity Tests
To run Ory Hydra against the OpenID Connect conformity suite, run
$ test/conformity/start.sh --build
and then in a separate shell
Running these tests will take a significant amount of time which is why they are not part of the CircleCI pipeline.
You can build a development Docker Image using:
Run the Docker Compose quickstarts
If you wish to check your code changes against any of the docker-compose quickstart files, run:
make docker docker compose -f quickstart.yml up # ....
Libraries and third-party projects
- Visit the Ory Blog for guides, tutorials and articles around Ory Hydra and the Ory ecosystem.
Package main ORY Hydra
Welcome to the ORY Hydra HTTP API documentation. You will find documentation for all HTTP APIs here.
Schemes: http, https Host: BasePath: / Version: latest Consumes: - application/json - application/x-www-form-urlencoded Produces: - application/json SecurityDefinitions: oauth2: type: oauth2 authorizationUrl: https://hydra.demo.ory.sh/oauth2/auth tokenUrl: https://hydra.demo.ory.sh/oauth2/token flow: accessCode scopes: offline: "A scope required when requesting refresh tokens (alias for `offline_access`)" offline_access: "A scope required when requesting refresh tokens" openid: "Request an OpenID Connect ID Token" basic: type: basic Extensions: --- x-request-id: string x-forwarded-proto: string ---
Package jwk implements JSON Web Key management capabilities
|Package jwk implements JSON Web Key management capabilities|
Package trust implements jwt-bearer grant management capabilities
|Package trust implements jwt-bearer grant management capabilities|