What can you do with this server?

The Frihet MCP Server connects AI assistants to the Frihet ERP/business management platform, enabling natural language control over business operations through 31 tools across 6 categories: * Invoicing: Create, list, search, update, and delete invoices with line items, tax rates, due dates, and status tracking * Expenses: Record, categorize, update, and delete business expenses with tax-deductibility tracking * Clients: Maintain a client database with contact info, tax IDs (NIF/CIF), and addresses * Products & Services: Manage a reusable catalog with pricing, SKU, units, and default tax rates for faster invoice/quote creation * Quotes: Create, track, update, and delete quotes/estimates with line items and expiry dates * Webhooks: Configure event-driven notifications for business events like invoice.paid or expense.created Additional capabilities: * Pre-built workflows: Guided multi-step prompts for monthly closing, client onboarding, quarterly tax preparation, overdue invoice follow-ups, and batch expense processing * Static resources: Access Spanish tax rates, filing calendars, expense categories, invoice status flows, and API documentation without extra API calls * Spanish tax compliance: Built-in support for IVA, IGIC, IPSI, and IRPF * Multiple connection options: Local STDIO, remote HTTP endpoint, or OAuth 2.0 * AI tool compatibility: Works with Claude Code, Cursor, Copilot, Gemini CLI, and others

Frihet MCP Server by berthelius

What is this

An MCP server that connects your AI assistant to Frihet. Create invoices by talking. Query expenses in natural language. Manage your entire business from your IDE.

You:     "Create an invoice for TechStart SL, 40 hours of consulting at 75 EUR/hour, due March 1st"
Claude:  Done. Invoice INV-2026-089 created. Total: 3,000.00 EUR + 21% IVA = 3,630.00 EUR.

31 tools. 5 resources. 5 prompts. Structured output on every tool. Zero boilerplate.

Install

One-line (Claude Code, Cursor, Copilot, Codex, Windsurf, Gemini CLI, and more)

npx skills add Frihet-io/frihet-mcp

Claude Code / Claude Desktop

{
  "mcpServers": {
    "frihet": {
      "command": "npx",
      "args": ["-y", "@frihet/mcp-server"],
      "env": {
        "FRIHET_API_KEY": "fri_your_key_here"
      }
    }
  }
}

Tool	Config file
Claude Code	`~/.claude/mcp.json`
Claude Desktop	`~/Library/Application Support/Claude/claude_desktop_config.json`
Cursor	`.cursor/mcp.json` or `~/.cursor/mcp.json`
Windsurf	`~/.windsurf/mcp.json`
Cline	VS Code settings or `.cline/mcp.json`
Codex CLI	`~/.codex/config.toml` (MCP section)

The JSON config is identical for all tools. Only the file path changes.

Remote (no install)

Use the hosted endpoint at mcp.frihet.io -- zero local dependencies, runs on Cloudflare Workers.

With API key:

{
  "mcpServers": {
    "frihet": {
      "type": "streamable-http",
      "url": "https://mcp.frihet.io/mcp",
      "headers": {
        "Authorization": "Bearer fri_your_key_here"
      }
    }
  }
}

With OAuth 2.0 + PKCE (browser-based login, no API key needed):

Clients that support OAuth (Claude Desktop, Smithery, etc.) can connect directly to https://mcp.frihet.io/mcp and authenticate via browser. The server implements the full OAuth 2.1 authorization code flow with PKCE.

Get your API key

Log into app.frihet.io
Go to Settings > API
Click Create API key
Copy the key (starts with fri_) -- it's only shown once

What you can do

Talk to your ERP. These are real prompts, not marketing copy.

Invoicing

"Show me all unpaid invoices"
"Create an invoice for Acme SL with 10h of consulting at 95/hour"
"Mark invoice abc123 as paid"
"How much has ClientName been invoiced this year?"

Expenses

"Log a 59.99 EUR expense for Adobe Creative Cloud, category: software, tax-deductible"
"List all expenses from January"
"What did I spend on travel last quarter?"

Clients

"Add a new client: TechStart SL, NIF B12345678, email admin@techstart.es"
"Show me all my clients"
"Update ClientName's address to Calle Mayor 1, Madrid 28001"

Quotes

"Create a quote for Design Studio: logo design (2000 EUR) + brand guidelines (3500 EUR)"
"Show me all pending quotes"

Webhooks

"Set up a webhook to notify https://my-app.com/hook when invoices are paid"
"List all my active webhooks"

Tools (31)

Invoices (6)

Tool	What it does
`list_invoices`	List invoices with pagination
`get_invoice`	Get full invoice details by ID
`create_invoice`	Create a new invoice with line items
`update_invoice`	Update any invoice field
`delete_invoice`	Permanently delete an invoice
`search_invoices`	Find invoices by client name

Expenses (5)

Tool	What it does
`list_expenses`	List expenses with pagination
`get_expense`	Get expense details
`create_expense`	Record a new expense
`update_expense`	Modify an expense
`delete_expense`	Delete an expense

Clients (5)

Tool	What it does
`list_clients`	List all clients
`get_client`	Get client details
`create_client`	Register a new client
`update_client`	Update client info
`delete_client`	Remove a client

Products (5)

Tool	What it does
`list_products`	List products and services
`get_product`	Get product details
`create_product`	Add a product or service
`update_product`	Update pricing or details
`delete_product`	Remove a product

Quotes (5)

Tool	What it does
`list_quotes`	List all quotes
`get_quote`	Get quote details
`create_quote`	Draft a new quote
`update_quote`	Modify a quote
`delete_quote`	Delete a quote

Webhooks (5)

Tool	What it does
`list_webhooks`	List configured webhooks
`get_webhook`	Get webhook details
`create_webhook`	Register a new webhook endpoint
`update_webhook`	Modify events or URL
`delete_webhook`	Remove a webhook

All 31 tools return structured output via outputSchema -- typed JSON, not raw text. List tools return paginated results ({ data, total, limit, offset }).

Resources (5)

Static context the AI can read without making API calls.

Resource	URI	What it provides
API Schema	`frihet://api/schema`	OpenAPI summary: endpoints, auth, rate limits, pagination, error codes
Tax Rates	`frihet://tax/rates`	Tax rates by Spanish fiscal zone: IVA, IGIC, IPSI, EU reverse charge, IRPF
Tax Calendar	`frihet://tax/calendar`	Quarterly filing deadlines: Modelo 303, 130, 390, 420, VeriFactu timeline
Expense Categories	`frihet://config/expense-categories`	8 categories with deductibility rules, IVA treatment, amortization
Invoice Statuses	`frihet://config/invoice-statuses`	Status flow (draft > sent > paid/overdue > cancelled), transition rules, webhook events

Prompts (5)

Pre-built workflows the AI can execute as guided multi-step operations.

Prompt	What it does	Arguments
`monthly-close`	Close the month: review unpaid invoices, categorize expenses, check tax obligations, generate summary	`month?` (YYYY-MM)
`onboard-client`	Set up a new client with correct tax rates by location, optionally create a welcome quote	`clientName`, `country?`, `region?`
`quarterly-tax-prep`	Prepare quarterly tax filing: calculate IVA/IGIC, identify deductibles, preview Modelo 303/130/420	`quarter?`, `fiscalZone?`
`overdue-followup`	Find overdue invoices, draft follow-up messages, suggest payment reminders	--
`expense-batch`	Process expenses in bulk: categorize, apply tax rates, flag missing receipts	`fiscalZone?`

How it works

Your AI assistant          frihet-mcp           Frihet API
      |                        |                    |
      |-- "create invoice" --> |                    |
      |                        |-- POST /invoices ->|
      |                        |<-- 201 Created ----|
      |<-- structured JSON --- |                    |

The server translates tool calls into REST API requests. It handles authentication, rate limiting (automatic retry with backoff on 429), pagination, and error mapping.

Two transports:

stdio (local) -- npx @frihet/mcp-server with FRIHET_API_KEY
Streamable HTTP (remote) -- https://mcp.frihet.io/mcp with Bearer token or OAuth 2.0+PKCE

Environment variables

Variable	Required	Default
`FRIHET_API_KEY`	Yes (stdio)	--
`FRIHET_API_URL`	No	`https://api.frihet.io/v1`

API limits

Limit	Value
Requests per minute	100 per API key
Results per page	100 max (50 default)
Request body	1 MB max
Webhook payload	100 KB max
Webhooks per account	20 max

Rate limiting is handled automatically with exponential backoff.

Claude Code Skill

Beyond raw MCP tools, this repo includes a Claude Code skill that adds business context: Spanish tax rules, workflow recipes, financial reports, and natural language commands.

Install the skill

git clone https://github.com/Frihet-io/frihet-mcp.git
ln -s "$(pwd)/frihet-mcp/skill" ~/.claude/skills/frihet

Or with the universal installer:

npx skills add Frihet-io/frihet-mcp

Commands

Command	What it does
`/frihet status`	Account overview, recent activity, pending payments
`/frihet invoice`	Create, list, search invoices
`/frihet expense`	Log and query expenses
`/frihet clients`	Manage client database
`/frihet quote`	Create and manage quotes
`/frihet report`	Financial summaries (P&L, quarterly, overdue)
`/frihet webhooks`	Configure automation triggers
`/frihet setup`	Guided setup and connection test

The skill knows about IVA rates, IRPF retention, Modelo 303 prep, expense deductibility rules, and VeriFactu compliance.

Full documentation: docs.frihet.io/desarrolladores/skill-claude-code

Development

git clone https://github.com/Frihet-io/frihet-mcp.git
cd frihet-mcp
npm install
npm run build

Run locally:

FRIHET_API_KEY=fri_xxx node dist/index.js

Test with the MCP Inspector:

npx @modelcontextprotocol/inspector node dist/index.js

Contributing

Contributions are welcome. Please open an issue first to discuss what you'd like to change.

git clone https://github.com/Frihet-io/frihet-mcp.git
cd frihet-mcp
npm install
npm run build   # must pass before submitting

License

MIT. See LICENSE.

Built by Frihet.

Frihet MCP Server