Ekwo OS MCP server

Ekwo OS

Ekwo OS is free and open source data infrastructure for accounting, finance and tax, under AGPL-3.0: a schema, the rules of each country as data, and tools, for businesses and their accountants. Install it on your own Supabase project and own your accounting data, forever. It is software — not an accounting firm, and not accounting, tax or financial advice (DISCLAIMER.md). Built and maintained by Ekwo. A fully managed edition — your own instance, operated for you, with the AI agents you configure acting on your instructions — is available at ekwo.ai.

An empty Supabase project to a prepared VAT return, for two countries side by side, with the published ekwo-os 0.5.0. How it was recorded, and a longer cut: docs/demo/.

Try it on your own books. Already using Claude? Start with Claude goes from a free Supabase project to your own books taken over, questioned and your next VAT return prepared — Claude Desktop or Claude Code, no web interface, about twenty minutes.

Why Ekwo

The long version — financial autonomy for every business, accounting as a

commons, a network rather than a vendor — is in MANIFESTO.md.

Accounting software has settled into two shapes, and both take something from you. The SaaS keeps your books on its servers, behind its API and its price list, and leaving means exporting a PDF. The open-source ERP gives you the code but keeps the parts that save time — bank feeds, automatic matching, invoice recognition — for the paid edition and a network of integrators.

Ekwo is built on a different premise: the data belongs to the business, and the work of keeping the books can be done by software that the business also owns. So the whole accounting core is open, the data sits in a Postgres database that you control, and the interface is designed for machines as much as for people. A REST API and an OpenAPI description come free with Supabase, and an MCP server sits on top of them, so an AI agent can book a purchase, match a payment, prepare a VAT return or produce a FEC on your own data — as you, under your own row level security, without the data ever leaving your account.

What we are building, in order:

Shortened. The full README is on GitHub.