Housecarl · Built for serious systems

Decisions you can defend.

Housecarl builds the decision layer for serious systems. Arbiter, our flagship, decides what to believe. AuthZ decides who may act. Tupshar stores knowledge for AI systems. All are fully audited and verifiable after the fact.

Arbiter → ▸ AuthZ ▸ Tupshar

The flagship · production system

What we build.

UDR-HC-02

Operational

Arbiter

reasoning engine

Source-weighted claim fusion you can audit.

Arbiter weighs every source by reliability and recency, fuses contradictory claims into a single scored verdict, and shows you exactly where the uncertainty lives.

Run investigations from the console, or connect from Claude, ChatGPT, or any MCP agent. Outputs are reproducible and fit for record.

arbiter.housecarl.cloud → Open the console →

Specification

Release Rolling

Hosting GCP · us-central1

Interfaces API · MCP

Output Scored verdict + audit

License Commercial

The portfolio · supporting products

Also in service.

UDR-HC-01

Operational

AuthZ

authorization

Unbundled authorization for platform teams.

AuthZ is the authorization service a platform team runs behind its own products: one policy engine, one decision point, one audit trail. Policies match by string, prefix, regex, or glob. Domains compose into a lattice with diamond inheritance. Tenant isolation is a property of the data model, not a flag.

Sold directly for on-prem deployment — your cluster, your data, your audit log. Evaluate it in the hosted demo environment.

authz.housecarl.cloud → Get AuthZ →

Specification

Availability On-prem license · hosted demo

Deploys on Kubernetes · Linux

Interfaces gRPC · REST · CLI

Audit Every decision logged

License Commercial

UDR-RES-01

Research Preview

Tupshar

AI-native knowledge base

Structured, searchable document store for LLM systems.

Tupshar is a research platform exploring how AI systems work with knowledge bases. Store and retrieve documents via HTTP API or MCP tools. Designed for LLM context windows with full-text search and structured metadata.

Free access during research preview. Multi-tenant, self-hosted or cloud. Your feedback shapes the roadmap.

tupshar.housecarl.cloud →

Status

Phase Research Preview

Access Free · By request

Interfaces HTTP API · MCP

Stability Subject to change

License Commercial

Decision systems that learn from data.

Write to support@housecarl.cloud for access or talk to sales@housecarl.cloud for enterprise terms.

Arbiter AuthZ Tupshar