Credo documentation

Credo is an open source TypeScript framework for verifiable credentials. You use it to build issuers, verifiers, wallets and mediators that exchange SD-JWT VC, mdoc, W3C and AnonCreds credentials over OpenID4VC and DIDComm, on Node.js and React Native.

Start here

Choose your setup recommends a platform, protocol, credential format and storage to start with.

Installation

Set up a Node.js or React Native project and install Credo.

Your first agent

Configure storage and keys, initialize an agent and create a DID.

Verifiable credentials

Issuers, holders and verifiers, and how protocols and formats fit together.

Example setups

Complete agent configurations for a mobile wallet, an issuer and verifier service, a multi-tenant service, a mediator and tests.

Build by role

Issue credentials

Run an OpenID4VCI issuer and offer credentials to any compliant wallet.

Build a wallet

Receive, store and present credentials from a mobile or cloud wallet.

Verify credentials

Request claims with DCQL and verify presentations with OpenID4VP.

Run a mediator

Relay DIDComm messages for mobile wallets that can't receive them directly.

Explore the docs

Agent setup

Storage, key management, caching, multi-tenancy and logging.

Protocols

OpenID4VC and DIDComm, role by role, and how to use each credential format with them.

Credential formats

SD-JWT VC, mdoc, W3C Verifiable Credentials, AnonCreds and status lists.

DIDs and trust

DID methods, X.509 certificates and deciding which issuers to trust.

Use with AI coding agents

Point your coding agent at llms.txt, an index of these docs as Markdown. Every page is also available as Markdown by adding .md to its URL. See AI coding agents.

Get help

Ask questions in the #credo channel on Discord, open an issue on GitHub, or join the working group calls.