Housecarl · Built for serious systems

Decisions you can defend.

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

Arbiter → ▸ AuthZ

The catalog · production systems

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

UDR-HC-01

Operational

AuthZ

authorization

Policy-as-contract authorization for production services.

Policies match by string, prefix, regex, or glob. Domains compose into a lattice with diamond inheritance. Multi-tenant isolation is a property of the data model, not a flag.

Self-hosted or cloud. Interfaces are gRPC and REST. Every decision is logged with principal, action, resource, and policy reference.

authz.housecarl.cloud →

Specification

Release v1.0 · GA Q2 2026

Deploys on Kubernetes · Linux

Interfaces gRPC · REST · CLI

p99 < 5ms

License Source-available

Research · experimental systems

Systems we're exploring.

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 Source-available

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