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DescriptionDistributed ledger purpose-built for decentralized identity

Hyperledger Indy provides tools, libraries, and reusable components for providing digital identities rooted on blockchains or other distributed ledgers so that they are interoperable across administrative domains, applications, and any other silo. 

Indy is in active development across the following areas: 

Distributed Ledger

Client Tools

Note: We are in the process of moving our Client Tools work to Hyperledger Aries. We recommend engaging with both communities for the time being if you interested in building applications on top of an Indy network.

Shared Components

Key Characteristics

  • Distributed ledger purpose-built for decentralized identity

  • Correlation-resistant by design

  • DIDs (Decentralized Identifiers) that are globally unique and resolvable (via a ledger) without requiring any centralized resolution authority

  • Pairwise Identifiers create secure, 1:1 relationships between any two entities

  • Verifiable Credentials in an interoperable format for exchange of digital identity attributes and relationships, currently in the standardization pipeline at the W3C 

  • Zero Knowledge Proofs which prove that some or all of the data in a set of Claims is true without revealing any additional information, including the identity of the Prover


  • An index of Indy documentation can be found here.
  • The documentation of the nitty gritty of the underpinnings of the code is located in the “docs” folder of each repo.
  • Note: Indy Documentation is in the process of migrating to:

Project Management



Mailing List

Sign up for the  Hyperledger Indy Mailing List here

Chat (for questions and ephemeral discussions)

General Discussion

  • #indy: questions and discussion about stable releases.

  • #indy-outreach : documentation improvements and efforts to invite and onboard contributors to the community.

Discussion about new development

  • #indy-agent: developing off-ledger identity services and interaction capabilities.

  • #indy-node: discussions about the distributed ledger.

  • #indy-sdk: client library that allows identity agents to talk to the distributed ledger.

  • #indy-pr-review: maintainer coordination and discussion.

  • #indy-maintainers: maintainer coordination and discussion.

  • #indy-outreach: discussions about education and cooperation efforst.

  • #indy-semantics: discussion on terminology and roles.


Indy Working Group Call

This call is a general call for any updates with the entire Indy community

Calls happen every Thursday 8amPT, 9amMT, 11amET, 4pmBST

Join from any device at:

Or iPhone one-tap (US Toll): +16465588656,232861185# or +14086380968,232861185#

Or Telephone: Dial: +1 646 558 8656 (US Toll) or +1 408 638 0968 (US Toll) Meeting ID: 232 861 185 International numbers available:

NOTE: There is a chance that the schedules here will conflict. Hyperledger should be taken as the source of truth if/when that happens. Efforts are likely being made to consolidate the calendar into Hyperledger's calendar. Please check the Indy rocket chat channel for the most current information.

Meeting agendas: INDY WG Call Agenda/Notes/Links

Recordings can be found here: Indy WG Recordings

Historical agendas can be found here: Indy WG Agendas

Indy Agent Working Group Call

This call is for people who are building agents or apps with Indy and want to know what others in the ecosystem are doing.

Calls happen every Wednesday 12noonPT, 1pmMT, 2pmET.

Join from PC, Mac, Linux, iOS or Android:

Look on the Indy-Agent channel on rocket chat for pre-meeting notifications.

Meetings and Agendas can be found here: Indy Agent Working Group

Indy SDK Working Group Call

People who want to contribute to the SDK should join this call. This does not replace our asynchronous collaboration, but should help us keep everyone up-to-date and moving together.

Calls happen every other Wednesday at 7AM Pacific, 10AM Eastern, 15H London, 17H Moscow


Discussion items: upcoming releases, current PRs, work that will generate future PRs, architecture changes that will impact downstream teams, project standards, best practices, design, etc.

Agendas: Indy SDK Working Group Agendas

You can work with us between calls on the Indy-SDK channel on Rocket Chat.



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