Frihet MCP Server

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What is this

An MCP server that connects your AI assistant to Frihet ERP. 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. 6 resources. Zero boilerplate.

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Install

One line. Pick your tool.

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)

If you prefer not to install anything locally, use the hosted endpoint at mcp.frihet.io:

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

Same 31 tools, zero local dependencies. Runs on Cloudflare Workers.

Get your API key

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

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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"

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Tools reference

Invoices / Facturas

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 / Gastos

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 / Clientes

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 / Productos

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 / Presupuestos

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

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

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How it works

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

The MCP server translates natural language tool calls into REST API requests. It handles authentication, rate limiting (automatic retry on 429), pagination, and error mapping. You just talk.

Environment variables

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

FRIHET_API_URL is useful if you self-host or want to point to a staging environment.

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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. You don't need to think about it.

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Claude Code Skill

Beyond raw MCP tools, Frihet ships a Claude Code skill that adds business intelligence: Spanish tax context, workflow recipes (monthly close, quarterly tax prep, overdue follow-up), formatted financial reports, and natural language commands.

Install the skill

# Clone and symlink
git clone https://github.com/berthelius/frihet-mcp.git
ln -s "$(pwd)/frihet-mcp/skill" ~/.claude/skills/frihet

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. It's your accountant in the terminal.

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

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Development

git clone https://github.com/berthelius/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

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Why Frihet MCP

	Frihet	Holded	Billin	Quipu	Anfix
Official MCP server	Yes	No (third-party)	No	No	No
Claude / Cursor / Windsurf	Yes	No	No	No	No
Public REST API	Yes	Yes	Limited	Yes	No
Webhooks with HMAC verification	Yes	No	No	No	No
AI assistant built-in	Yes	No	No	No	No
Open source tooling	Yes	No	No	No	No

No other Spanish ERP has an official MCP server. Frihet is first.

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Links

• Frihet ERP -- The product
• API documentation -- REST API reference
• Webhook documentation -- Events, signatures, retries
• Remote endpoint -- Hosted MCP server (Cloudflare Workers)
• MCP specification -- The protocol

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License

MIT. See LICENSE.

Built by BRTHLS.