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Grok Build + AccountsOS

The AccountsOS plugin for Grok Build brings your accounts into xAI's terminal agent. The same 6 slash commands, 4 auto-firing UK tax skill packs and 13 accounting tools that power our Claude plugin, installed straight from the Grok plugin marketplace.

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Commands

Skills

Tools

Focused

Install plugin

# In Grok Build
/plugin install accountsos

# Set your API key
export ACCOUNTSOS_API_KEY="sk_live_..."

# Available commands:
# /weekly-check  - Balance, P&L, deadlines
# /log-expense   - Quick expense entry
# /vat-check     - VAT position
# /deadlines     - Upcoming filings
# /invoices      - Invoice overview
# /categorize    - Bulk categorisation

Available Tools

Tool	Description	Scope
`get_transactions`	Query income and expenses with date and direction filters	read
`get_balance`	Check current account balances across all accounts	read
`get_vat_summary`	Get VAT position for any quarter	read
`get_deadlines`	List upcoming filing deadlines	read
`create_transaction`	Record income or expense entries	write
`update_transaction`	Modify transaction details or categories	write
`categorize_transaction`	Get AI category suggestion for a transaction	write
`list_categories`	Browse HMRC-aligned expense and income categories	read
`create_deadline`	Add custom filing deadlines and reminders	write
`search_documents`	Find receipts, invoices, and contracts	read
`upload_document`	Store receipts and invoices with metadata	write
`get_dla_balance`	Check Director's Loan Account with S455 warnings	read
`get_invoices`	List and filter invoices by status	read

Features

6 slash commands: /weekly-check, /log-expense, /vat-check, /deadlines, /invoices, /categorize

4 auto-firing skill packs for UK accounting, VAT, expenses, and tax deadlines

All 13 AccountsOS tools available via the hosted MCP server

Installed from the official xAI plugin marketplace, pinned to a verified commit

Same plugin source as our Claude version: one repo, every agent

Weekly finance check without leaving your terminal

How It Works

Install from the marketplace

Open the plugin marketplace inside Grok Build and install the accountsos plugin.

/plugin install accountsos

Set your API key

Export your AccountsOS API key as an environment variable.

export ACCOUNTSOS_API_KEY="sk_live_..."

Use slash commands

Start any Grok Build session and use /weekly-check, /log-expense, /vat-check, and more.

/weekly-check
/log-expense Figma subscription £45
/vat-check Q4 2026

Benefits

Run a full weekly finance check with one command

Log expenses without leaving your coding session

Auto-firing skills inject verified UK tax rules when needed

Check VAT position before quarterly deadlines

Installed and updated through xAI's own marketplace

What is Grok Build?

Grok Build is xAI's terminal coding agent. Its plugin marketplace lets you install packages that bundle skills, slash commands and MCP servers. The AccountsOS plugin connects it to your books.

When will the plugin be available?

The plugin has been submitted to the official xAI plugin marketplace and is awaiting review. The same plugin is already available today for Claude Code and Claude Cowork.

Do I need a separate AccountsOS account?

Yes. Sign up at accounts-os.com and generate an API key from your dashboard. The plugin uses this key to access your accounting data securely.

Is my financial data sent to xAI?

The plugin calls one endpoint: the AccountsOS hosted MCP server, authenticated with your own revocable API key. Only the answers to your queries enter the agent's context, and your data stays in your AccountsOS account.

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AI-powered accounting for your UK limited company.

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