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In progressMCP servers

Lacerte MCP

Professional tax software, callable by AI.

A local Windows server that lets an AI assistant read and update returns in Intuit Lacerte professional tax software. It includes a simulation mode for safe testing and deliberately leaves e-filing to humans.

View source on GitHub
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lacertmcp — illustration
LaMCP servers

→Read, write and create client returns through the vendor SDK

→Simulation mode with seeded demo clients

→Bulk writes with dry-run preview and idempotency

C#.NET 4.8COM interopODBCMCP

Two ways to read it

In plain English

A local Windows server that lets an AI assistant read and update returns in Intuit Lacerte professional tax software. It includes a simulation mode for safe testing and deliberately leaves e-filing to humans.

For engineers

C# on .NET Framework 4.8 over COM interop and ODBC, speaking MCP over JSON-RPC/stdio, with dry-run bulk writes, idempotency, a doctor probe, correlation IDs and redacted wire logs.

What it does.

  • Read, write and create client returns through the vendor SDK
  • Simulation mode with seeded demo clients
  • Bulk writes with dry-run preview and idempotency
  • E-filing stays a human decision, by design

Built with

  • C#
  • .NET 4.8
  • COM interop
  • ODBC
  • MCP

Status: In progress · started June 2026 · open on GitHub

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