# Archstone

> Archstone is the Capability Platform: describe what a business does once, as a capability document (CDL), and compile it into interfaces every AI assistant can use. © 2026 NousVigil LLC. The core and @archstone/collector are open source (Apache-2.0); the hosted console is closed-source software of NousVigil LLC.

Machine-readable index of the API surface: https://archstone.dev/apis.json

## Docs

- [Source repository and README](https://github.com/NousVigil/archstone): what Archstone is, how to install it, what is free and what is sold
- [Documentation](https://github.com/NousVigil/archstone/tree/main/docs): specification, glossary, ADRs and RFCs
- [Getting started](https://github.com/NousVigil/archstone/blob/main/docs/ONBOARDING.md)
- [CDL specification](https://github.com/NousVigil/archstone/blob/main/docs/cdl-specification.md): the capability document language
- [Live demo](https://archstone.dev/demo): a page for non-technical readers: scenario cards on an invented travel agency, each with what you ask, what happens and what Archstone refuses or withholds, runnable live; no code on the page
- [How the Showcase works](https://archstone.dev/demo/how-it-works): the technical companion to the demo, in English: for each of 23 scenarios on one synthetic travel agency, the CDL and binding with the declared fields marked, what the agency's API returned against what the model received, the raw MCP exchange, the denial payload and the test that proves it; what is locked or not yet built is stated; the earlier technical walkthrough's commands are re-pointed at the same agency

## APIs and packages

- [OpenAPI description](https://archstone.dev/openapi.yaml): machine-readable contract for the console's two public operations above (the demo capability below has its own contract, described separately)
- [For developers](https://archstone.dev/developers): the technical side — the connector URL, Claude Code one-liner and curl for the demo, the CDL capability declaration, how the compiler and verify work, neutral hosting, and what is open source
- [Demo capability: tourism.search](https://archstone.dev/developers#try-it): public remote MCP server at https://demo.archstone.dev/mcp and JSON endpoint POST https://demo.archstone.dev/v1/search; synthetic data, no key
- [Verify my API](https://archstone.dev/verify): paste your own OpenAPI document's address and get a free, read-only report of what an agent gateway would call and what it would leave alone; nothing stored beyond the access log, no account
- [Postgres database input (sql connector), experimental](https://github.com/NousVigil/archstone/blob/main/docs/guides/sql-connector.md): a binding is written by hand, or drafted from a Postgres catalog by `archstone init --source postgres --dsn-env VAR` (in the repository, not yet in a published release); Postgres only and read-only, isolation enforced by the database (row-level security, unprivileged runtime role, caller identity set per call in a read-only transaction) and checked by a mandatory negative-isolation test; embedded via the SDK or stdio with a host-supplied caller; since @archstone/* 0.34.0; experimental means the interface may change before it is declared stable
- [@archstone/collector](https://www.npmjs.com/package/@archstone/collector): console collector (SDK); outbound-only audit sink and scheduled verify probe
- [Pricing](https://console.archstone.dev/pricing): public plans and prices for the hosted console, per billing period, with what each plan includes and the credit packs; no account needed. Add `?locale=` (en, ro, de, es, fr, pt, ja, zh) for a language
- [Console](https://console.archstone.dev/sign-up): hosted Archstone console, with a Free plan and paid Starter, Growth and Enterprise plans (see Pricing above); import an OpenAPI description, publish capabilities as MCP endpoints, and keep drift history and audit records

## Policies

- [Changelog](https://github.com/NousVigil/archstone/blob/main/CHANGELOG.md)
- [Security policy](https://github.com/NousVigil/archstone/blob/main/SECURITY.md): how to report a vulnerability
- [Support](https://github.com/NousVigil/archstone/blob/main/SUPPORT.md)
- [License](https://github.com/NousVigil/archstone/blob/main/LICENSE): Apache-2.0, for the open-source core
- [Console terms](https://console.archstone.dev/terms) and [console privacy notice](https://console.archstone.dev/privacy-notice): govern the hosted console, not archstone.dev

## Optional

- [Why a compiler, not the fifth MCP server](https://archstone.dev/why-a-compiler-not-the-fifth-mcp-server): launch essay