cratis.io valid

Cratis

Cratis is an open-source, MIT-licensed platform for building event-sourced and CQRS applications. At its center is Chronicle, an event-sourcing database and processing runtime with a first-class .NET SDK and additional TypeScript, Kotlin/Java (JVM), and Elixir clients, plus an experimental Go client — with a Python client coming soon — plus pluggable storage-provider implementations including MongoDB (default), PostgreSQL, SQL Server, and SQLite.

Visit publisher ↗

For agents: Cratis: MIT-licensed open-source event-sourcing database (Chronicle) and Arc/CQRS framework with .NET, TypeScript, JVM and Elixir SDKs and extensive product doc

event sourcing cqrs chronicle database .net sdk mongodb

Authority: 45 reach 0 · trust 5 · quality 25 · freshness 15
Tier: listed
llms.txt: https://www.cratis.io/llms.txt
llms-full.txt: https://www.cratis.io/llms-full.txt
Sections: 6
Links: 48
Size: 9245 bytes
Country: United States Hosting inference
Hosting country: United States Hosting inference
Country evidence: No published address evidence collected yet
Categories: Data and analytics · Open source projects · Developer tools
For agents: Documentation: developer or product docs worth reading, nothing to call
Inferred actions: Read documentation Download data About these labels
Audience: developers · agents can: read docs, download data · en
First seen: 2026-10-25T04:52:15.343Z
Last checked: 2026-10-25T04:52:18.194Z
Badge

Their llms.txt

The beginning of the file, from our validated copy saved 2026-10-25T04:52:15.447Z. Cached copy · Source on cratis.io

# Cratis

> Cratis is an open-source, MIT-licensed platform for building event-sourced and CQRS applications. At its center is Chronicle, an event-sourcing database and processing runtime with a first-class .NET SDK and additional TypeScript, Kotlin/Java (JVM), and Elixir clients, plus an experimental Go client — with a Python client coming soon — plus pluggable storage-provider implementations including MongoDB (default), PostgreSQL, SQL Server, and SQLite.

## About Cratis

- Cratis is an open-source (MIT) event sourcing and CQRS platform for .NET, built around the Chronicle event-sourcing database.
- Products: Chronicle (event store and runtime), Arc (CQRS framework with generated TypeScript proxies), Components (React UI library), Fundamentals, Specifications, CLI, Workbench, Chronicle MCP, and Cratis AI (rules and skills for AI agents). Screenplay, Stage, and Prologue are experimental; Studio is a paid product in Preview.
- Licence: the open-source Cratis products are MIT licensed. Studio is paid.
- Languages: Chronicle has a first-class .NET client and clients for TypeScript, Kotlin/Java, and Elixir, plus an experimental Go client; a Python client is coming soon and not yet published. Arc runs on ASP.NET Core and Spring Boot; Components targets React.
- Storage: MongoDB (default), PostgreSQL, Microsoft SQL Server, or SQLite.
- Downloads: over 2.5 million downloads across NuGet, npm, Docker Hub and Hex, counted October 2026. Chronicle, including its predecessors Aksio Cratis and the Dolittle Runtime: over 1.5 million downloads. Arc, including Aksio Cratis Applications and the Dolittle SDK: over 1.2 million downloads.
- Get it from NuGet, npm, Maven Central, Hex, Docker Hub, and GitHub (https://github.com/Cratis).
- Built by Cratis, a small company that builds and maintains the platform.
- Capability map: https://www.cratis.io/cratis-stack/#capability-map. Support matrix: https://www.cratis.io/compatibility/#support-matrix.

## Key facts

- Chronicle exposes a language-agnostic gRPC/protobuf boundary; its kernel runs on Microsoft Orleans.
- Arc is an opinionated CQRS application framework — commands, queries, validation, authorization, and TypeScript proxy generation. It is implemented for ASP.NET Core and for Spring Boot on the JVM, and both generate against the same TypeScript packages. It works without event sourcing; Chronicle integration is optional.
- Components is a React component library aligned with Arc patterns: command dialogs, typed forms, and query-backed data tables.
- The CLI and Workbench are the inspection and diagnosis surfaces for Chronicle: events, observers, projections, read models, and failed partitions.
- Screenplay is the declarative event-modeling language that Stage and Studio build on.

## Product documentation

Choose a product and then a task area. The full-site downloads below are bulk archives, not the best default context for one question.

- [Chronicle documentation](https://www.cratis.io/chronicle/llms.txt)
…

Related sites

Explore similar publishers →

Similar publisher descriptions and documentation. Similarity does not imply affiliation or equivalent capabilities.

Domain	Title	Category	Country	Authority	llms.txt	llms-full.txt
dapr.io	Dapr	documentation AI and machine learning Infrastructure +2 Read documentation	US	52	✓
railseventstore.org	Rails Event Store	documentation Open source projects Developer tools Read documentation	US	46	✓
sentio.xyz	Sentio	interface Data and analytics Developer tools +1 Read documentation Call an API+1	—	63	✓	✓
questdb.com	QuestDB	documentation Data and analytics Databases Read documentation Download data+1	US	62	✓	✓
redis.io	Redis Documentation	documentation Data and analytics Databases +1 Read documentation	—	63	✓
arbitrum.io	Arbitrum Documentation	interface Crypto and Web3 Documentation and reference +1 Read documentation Call an API	US	50	✓	✓
memorilabs.ai	Memori	interface AI and machine learning AI agents and MCP +1 Read documentation Call an API	—	49	✓
trychroma.com	Chroma	interface AI and machine learning Data and analytics +1 Read documentation Call an API	US	56	✓

Machine-readable: GET /v1/resolve?q=cratis.io · GET /v1/domain/cratis.io · this page as Accept: application/json or text/markdown · MCP lookup_domain

Automatically discovered from public files. Inclusion does not imply endorsement or publisher participation.

Own or manage this website?

If you own or manage cratis.io, you can update its listing and review file health, discovery activity and score history.

Manage this listing — optional

What verification unlocks

See how your site is discovered—and control what agents see.

See your website in the map
Review your indexed topics, nearby publishers sharing headings, measured listing exposure and map snapshots in a private report for your website.
Control what agents see
Edit your listing description, tags, public contact details and additional llms.txt paths. Publish your terms for automated access, attribution and pricing.
Make your profile eligible for search
A valid, listed, unblocked, verified profile can appear in our publisher sitemap and become eligible for search-engine visibility. Search engines decide what to index and rank.
Appear in our llms-full.txt
Eligible verified publishers are listed by name, with their file links and summaries, in the service overview agents can read.

Free. No account registration, backlink or payment required. Public discovery remains available without verification.

Verify your website—free

Preview the owner dashboard · All verification benefits

Let your coding agent verify it

If your coding agent is authorized to manage this website, paste these instructions into it.

Claim my listing on Agent Web Map for cratis.io:
1. POST https://agentwebmap.com/v1/sites/cratis.io/claims and keep claim_id and claim_secret private.
2. Publish the verification line "AgentWebMap verification: <token>" (token from step 1) in https://cratis.io/llms.txt, or use the DNS, meta-tag or well-known method the response describes. This only verifies the listing; your website and domain remain yours.
3. POST https://agentwebmap.com/v1/sites/cratis.io/verify with {"claim_id": "...", "claim_secret": "..."}.
4. Save the api_key from the answer; it manages the listing (PATCH https://agentwebmap.com/v1/sites/cratis.io).
MCP equivalent: tools begin_ownership_claim, then verify_domain, at https://agentwebmap.com/mcp. Docs: https://agentwebmap.com/docs#verify

Corrections or removal requests: contact the directory.