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Exact Online API and MCP server

Exact Online's API covers invoices, relations and journal entries, but it takes a registered app, OAuth and code you write and host. Sign in to Exact Online once in your own Cloud Browser, and your AI agent does the work there for you. The same tools work over MCP for agents and as a REST API for scripts.

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Not affiliated with Exact Online.

Exact Online has no API for this. So we run one for you.

Exact Online's own API, a GitHub MCP server and Cotlet compared
What you need Exact Online's APIGitHub MCP serverCotlet
Use without an API key or code No No Yes, 12 tools
Acts as you, signed in 24/7 No No Yes, Cloud Browser
Fixed for you when Exact Online changes N/A No Yes, tested every 6h
Runs with your laptop off N/A No Yes, hosted

Checked Oct 14, 2026. Sources: Exact Online REST API: reference documentation · Exact Online REST API: SalesInvoices · Exact Online REST API: PrintedSalesInvoices · Exact Online REST API: GeneralJournalEntries

Your own Cloud Browser, on 24/7. Sign in once. We keep it connected.

  1. 01Sign in to Exact Online in your own Cloud Browser

  2. 02Connect it for your agents

  3. 03Cotlet keeps it signed in and working

How do I connect Exact Online to Claude, ChatGPT or my code?

AI agents connect over MCP, scripts call the REST API. Both reach the same 12 tools with one API key.

For AI agents: MCP

Add Cotlet to your agent once. Exact Online and every other app you connect show up as its tools.

  • Claude
  • ChatGPT
  • OpenClaw
  • Hermes
  • GrokBot
  • Cursor
  • n8n
  • Any MCP client
  1. 1

    Add Cotlet to your agent

    Claude Code
    claude mcp add --transport http cotlet \
  https://cotlet.dev/mcp/v1 \
  --header "Authorization: Bearer $COTLET_API_KEY"
    Cursor
    {
  "mcpServers": {
    "cotlet": {
      "url": "https://cotlet.dev/mcp/v1",
      "headers": {
        "Authorization": "Bearer ${COTLET_API_KEY}"
      }
    }
  }
}
    Codex
    # ~/.codex/config.toml
[mcp_servers.cotlet]
url = "https://cotlet.dev/mcp/v1"
bearer_token_env_var = "COTLET_API_KEY"

    Paste the snippet for your client. The same server and key serve every app you connect, so you do this once.

For scripts: REST API

Every tool is an endpoint under /api/v1/exact-online with its own method and path, such as POST /api/v1/exact-online/sales-invoices, with the same API key. Our open-source repo has ready scripts to start from.

REST API docs

What can the Exact Online API and MCP server do?

12 tools on your own Exact Online account. Agents call them as operations of the MCP tools exact_online_read and exact_online_write; scripts call each one at its own REST endpoint, with the same inputs and answers.

API reference
Exact Online tools in Cotlet's MCP server and REST API
Tool What it does Access
list_divisions The Exact Online companies (divisions) your account can work in. read
search_relations Customers and suppliers (relations) by name, with code, city and status. read
list_sales_invoices Sales invoices of a division with number, customer, date and amount. read
get_sales_invoice One sales invoice with all its lines. read
list_receivables Payments still to be received, with customer, amount, due date and status. read
list_gl_accounts General ledger accounts of a division with code and description. read
list_journal_entries General journal entries of a division with date, description and lines. read
create_relation Add a customer or supplier (relation) to a division. write
create_sales_invoice Create a sales invoice with its lines for a customer. It does not send it. writeasks first
send_sales_invoice Send an existing sales invoice to the customer by email, postbox or Peppol. writeasks first
book_journal_entry Book a general journal entry with debit and credit lines. writeasks first
create_purchase_entry Book a supplier invoice as a purchase entry with its lines. writeasks first

Scroll the table for all 12 tools.

Ask in plain words. Your agent does the rest.

All Exact Online use cases

Is it safe to connect Exact Online?

You sign in yourself in your own Cloud Browser, we never save your password, and anything that reaches your readers waits for your OK. The browser profile is encrypted in the EU. Independent scanners grade cotlet.dev A+.

Security overview

How much do the Exact Online API and MCP server cost?

One price for both: a tool call costs the same over MCP or REST. Free 7-day trial with 2,000 credits, no card needed. Then one-time credit packs, no subscription, valid 12 months. Each call uses 10 credits, and your Cloud Browser uses 50 credits a day while Exact Online is enabled for agents, so 20 calls a day come to 250 credits.

See full pricing
Cotlet credit packs: price, credits and calls at 10 credits each
Credits Price, one time Calls at 10 credits Per 1,000 credits
5,000 $29 500 $5.80
15,000 $79 1,500 $5.27
32,000 $149 3,200 $4.66
60,000 $249 6,000 $4.15

Only successful calls use credits; failed calls and timeouts cost nothing. At a balance of 0 calls pause, never a surprise charge. Authenticate with the Authorization: Bearer header.

Questions

Does Exact Online have an API?

Yes. Exact Online has a full REST API (checked 14 Oct 2026): sales invoices, relations, journal entries, purchase entries and receivables can be read and written per division. It has no official MCP server from Exact, and you must register your own app and handle OAuth and per-division access first.

How do I get access?

Sign up free, open Exact Online under Integrations in the console and press Request access. Your free trial starts with your account, no card needed.

Is the MCP server different from the API?

No, only the way in. Cotlet builds each integration as a REST API and puts an MCP server on top, so both have the same 12 tools, the same inputs and answers, one API key and one price. AI agents such as Claude, ChatGPT or Cursor use MCP; scripts, cron jobs and HTTP steps in n8n, Make or Zapier use the REST API.

What is the Cloud Browser?

Your own Chrome that Cotlet runs for you in the EU, around the clock. You open it from the console, sign in to Exact Online yourself and press Enable for agents. Your agent's calls go through it, from its IP with its cookies, so Exact Online sees the browser you signed in with. Password saving is off and the profile is stored encrypted with AES-256-GCM.

Can my agent act without asking me?

Not on anything that reaches other people: create_sales_invoice, send_sales_invoice, book_journal_entry, create_purchase_entry wait for your OK by default. You can switch that off per tool for scheduled runs.

Should I use a Exact Online MCP server from GitHub instead?

Pick one if you want the code on your own computer and do not mind the upkeep: you install it, sign it in and fix it when Exact Online changes. Pick Cotlet if you want it hosted and kept working for you.

Can I use it in n8n, Make or Zapier?

Yes. Add https://cotlet.dev/mcp/v1 in n8n's MCP Client node, or call the REST endpoints from an HTTP step in Make or Zapier.

Who runs Cotlet?

Cotlet is run by Take Group, a Polish software company working since 2019. Take Group runs about 3,200 websites on its own systems and has its own DevOps team for infrastructure security. We built and used integrations like this inside the company for years before opening them as Cotlet.

Is Cotlet affiliated with Exact Online?

No. Cotlet is independent and not affiliated with Exact Online.

Give your agent access to Exact Online.

Free 7-day trial with 2,000 credits, no card needed.

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