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mika MCP for ChatGPT and Claude

Your bookkeeping, live in ChatGPT and Claude.

mika books your receipts. Connect mika to ChatGPT and Claude once through MCP, a connection for AI assistants, and your assistant can read everything you see in mika and do what you allow. Ask it about your BWA, for example, or have it write an invoice. What you make of it is up to you.

See mika liveLukaNiklasAn expert from our team shows you mika liveA live demo, tailored to your companyYour questions on bookkeeping and German paperwork answered on the spot15 minutes on a video call, free and with no strings attachedHow to connect mika
Recreated chat with an AI assistant connected to mika: you ask for a cockpit, and next to the chat it assembles it tile by tile, with bank balance, open items and gross profit per project from mika, the pipeline from your CRM and this week's events from your calendar.

For example, a cockpit, if you ask for one: your numbers from mika next to your pipeline and your calendar.

More than 900 companies rely on mika

One example of many

A week with your assistant and mika.

You run an agency and handle the finances yourself. Until now, every question about your numbers meant exporting them and rebuilding them in Excel. Now you ask your assistant. Here are four things from one week. Your week looks different, and so do your questions.

  1. A briefing for the week.

    On Monday you have your assistant build you a briefing for the week. It puts the numbers from mika next to your calendar and CRM. You see that your October VAT return has to go out by 10 Nov and which big invoice falls due next. You also see what stays on the account after that, and the assistant's estimate of where Q4 will land.

  2. The investor update for Q3.

    On Tuesday you ask for a quarterly update for your investors. Your assistant takes Q2 and Q3 from your BWA, the German monthly management report, and attaches the BWA 2026 as a PDF.

  3. An invoice in one sentence, out after your OK.

    On Thursday you have your assistant write an invoice. You haven't yet billed your client Nebelkamp Kaffeerösterei GmbH for the social media edits for the autumn campaign. Your assistant takes the hourly rate from your last invoice and shows you the draft. After your OK the invoice goes out, with an e-invoice and a QR code.

  4. A cockpit for the week.

    On Friday you want to see where your agency stands, and ask for a cockpit built the way you want it. Your assistant builds it from mika, CRM and calendar, with Thursday's invoice already in it. Say “Refresh”, and it fetches the latest.

Try it out

Ideas for your bookkeeping.

16 examples you can type into your assistant just like this.

Monday morning

“Give me my Monday briefing.”

Your appointments and deadlines, plus what stays on your account in two weeks.

“Why are other costs so high in October?”

Your assistant goes from the figure in the BWA down to the single receipt.

“How did October go compared with September?”

Both months from your BWA, as a table in the chat.

“How much VAT do I pay next, and by when?”

The estimated amount of your next UStVA, the monthly or quarterly VAT pre-return, and the day it's due.

Month end

“Which clients haven't paid yet? Write me the reminders.”

Your unpaid invoices per client, with a reminder text for each.

“Which payments still have no receipt? The invoices are in this shared Drive folder.”

Your assistant takes the matching invoices from the folder, uploads them to mika and matches them to the payments.

Writes, after you confirm

“Write Nebelkamp the invoice for 16 hours on the autumn campaign.”

After your OK it goes out, with an e-invoice and a QR code.

Writes, after you confirm

“Prepare the payment run for everything that's due.”

The invoices that are due go into the payment run, your batch transfer. You release it yourself.

Writes, after you confirm

Investor call and bank

“Build me the investor update for Q3.”

Your assistant puts Q3 next to Q2 and writes the text for your investors.

“I need the P&L with a prior-year comparison as a PDF for the bank.”

Your GuV, the German P&L, with a prior-year column, as a PDF to forward.

“What was left over from the Nebelkamp autumn campaign? As a BWA PDF.”

The BWA for just the campaign's cost centre, with revenue and costs side by side.

Annual accounts

“What's still missing for my 2025 annual accounts?”

Your assistant tells you which documents are missing. Give it the link to one of them, and it uploads it after your OK.

Writes, after you confirm

“Fill in the details still missing for my annual accounts.”

Your assistant enters details such as shareholders and managing directors in mika after your OK.

Writes, after you confirm

Your own tool

“Build me a cockpit from mika, CRM and calendar.”

One sentence, and your cockpit shows the latest figures.

“Every Monday, tell me which client is more than 30 days late paying.”

You set it up in your assistant as a recurring task. Every Monday it checks your unpaid invoices.

“Create the invoices from our billing software in mika every month.”

Your assistant creates them in mika as drafts. You send them yourself.

Writes, after you confirm
I also use the MCP and API connection to pull my accounting data directly for analyses, without having to export and prepare it first.
LukaszCo-Founder, Worqshop IO UGView on OMR Reviews, June 2026Translated from German
Setup

Copy the address, sign in, done.

Through MCP, a connection for AI assistants, ChatGPT and Claude get your numbers straight from mika.

  1. 1

    Copy the address

    It's right here, and in mika under Settings, Integrations.

  2. 2

    Paste it into ChatGPT or Claude

    Add it there as a connector in the settings.

  3. 3

    Sign in with mika

    One login, and your assistant is connected.

https://mcp.app.getmika.de/mcp

Not on mika yet? In the demo call we show you how your bookkeeping runs with mika.

See mika liveLukaNiklasAn expert from our team shows you mika liveA live demo, tailored to your companyYour questions on bookkeeping and German paperwork answered on the spot15 minutes on a video call, free and with no strings attached
Built with mika

What founders have already built with it.

Franchise with many locations

A franchise has built one cockpit across all its locations. Through MCP it pulls each location's numbers from mika.

  1. mika MCP
  2. BWA, Bilanz, UStVA, receipts, transactions
  3. One cockpit across all locations
A UG with its own cost dashboard

A UG, the mini GmbH with less share capital, has built its own cost dashboard. Every number in it comes straight from mika, with no export and no retyping.

  1. mika MCP
  2. Bookkeeping from mika
  3. Own cost dashboard
Build it yourself

Build your own tool.

You connect Claude Code and Codex, the coding assistants from Anthropic and OpenAI, through the same address. Then they write you the scripts and dashboards you have in mind, with your numbers from mika.

  • An API key works for one company or for all your companies.
  • One login sees all your companies, say your holding and your GmbH side by side.
  • For your other tools there's API & Zapier.
Safety

Your assistant asks first.

Plans

MCP comes with every plan.

You pay for your bookkeeping. The connection for ChatGPT and Claude comes with it.

Bookkeeping

Mika prepares your bookkeeping, your tax advisor the annual financial statements

from

49€

/month *

See mika liveLukaNiklasAn expert from our team shows you mika liveA live demo, tailored to your companyYour questions on bookkeeping and German paperwork answered on the spot15 minutes on a video call, free and with no strings attached

as an alternative to bookkeeping from a tax advisor + accounting software

  • Invoice validation
  • Account assignment
  • Payment reminder
  • Create invoices
  • Advance VAT return
  • Review by accountant
  • Handing over error-free accounting to your tax advisor for a more favourable financial statement

Accounting and financial statements

Mika does your bookkeeping and annual financial statements

from

99€

/month *

See mika liveLukaNiklasAn expert from our team shows you mika liveA live demo, tailored to your companyYour questions on bookkeeping and German paperwork answered on the spot15 minutes on a video call, free and with no strings attached

as an alternative to accounting & annual financial statements from a tax advisor

  • Invoice validation
  • Account assignment
  • Payment reminder
  • Create invoices
  • Advance VAT return
  • Review by accountant
  • You prepare the annual financial statements yourself with Mika. We provide you with everything you need
  • If you have tax questions, we will provide you with a tax advisor from our network

All Inclusive

Mika does your bookkeeping and provides you with a partner tax advisor for the annual financial statements

upon request

See mika liveLukaNiklasAn expert from our team shows you mika liveA live demo, tailored to your companyYour questions on bookkeeping and German paperwork answered on the spot15 minutes on a video call, free and with no strings attached

as a complete alternative to your current tax advisor

  • Invoice validation
  • Mika-bot, accountant and tax advisor chat
  • Account assignment of AI & accountant
  • DATEV export
  • Payment reminders
  • Create invoices
  • Advance VAT return
  • Financial statements with tax advisor

* Prices vary depending on the number of expected monthly receipts and transactions. You will receive an individual offer from us.

Cost comparison

Work out with your own figures what mika costs and what a traditional tax firm costs.

Open the cost calculator

Questions about MCP

MCP stands for Model Context Protocol, a connection through which AI assistants like ChatGPT and Claude work with your bookkeeping in mika. You copy an address, paste it into your assistant and sign in with your mika account. You don't need to write any code.

Your bookkeeping stays in mika. Your assistant gets the answers to your questions and processes them under its provider's rules, OpenAI's for ChatGPT, Anthropic's for Claude. Whether your provider may use your chats for training is something you set in the privacy settings of ChatGPT or Claude. It works with your login and sees only what you can see in mika.

With ChatGPT and Claude. Claude Code and Codex sign in with your mika account the same way. For your own scripts and other tools, you create an API key.

Yes. Every company starts in read mode, and we switch on writing for your company whenever you like. Then your assistant creates invoices, uploads receipts, matches them to payments, prepares the payment run and keeps your cost centres up to date. Writes only after you confirm: your assistant asks before it changes anything.

Your assistant asks before it changes anything. If an invoice goes to your client, you confirm the recipient and the text first. No change goes through without a reason from your assistant, and the audit log shows each one with its reason, time and assistant. Booking rules from your assistant wait until you activate them.

In mika, copy the address https://mcp.app.getmika.de/mcp under Settings, Integrations. In ChatGPT or Claude, add it as a connector and sign in with your mika account. You don't need an API key for it.

The mika Agent is the chat in the mika app, there without any setup. With MCP you bring your bookkeeping into ChatGPT and Claude. There your assistant puts your numbers next to your other sources, say your calendar and CRM.

Yes. Under Settings, Integrations, API Keys you create a key for one company, or one for all your companies. With it you connect your own scripts, dashboards and tools, also through Zapier.

Yes, in every plan, for reading and for writing. You pay for your bookkeeping, and you connect ChatGPT and Claude at no extra cost.

Bring your bookkeeping into ChatGPT and Claude.

See mika liveLukaNiklasAn expert from our team shows you mika liveA live demo, tailored to your companyYour questions on bookkeeping and German paperwork answered on the spot15 minutes on a video call, free and with no strings attached

Book a demo and get your first month free

Find out in 15 minutes how you automate your bookkeeping and Jahresabschluss (annual financial statements) with mika.

  • Tailored to your company
  • Your questions answered on the spot
  • An offer made for you
See mika live

Applies to the first month of your mika subscription.

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